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Marc-Alexandre Chan  committed 4f1409f

Initial Mercurial import. Partial development of the minibot.

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File .hgignore

Empty file added.

File data/orangereds.txt

+{'body': u'This is a test comment.'
+ 'was_comment': True
+ 'first_message': None
+ '_info_url': 'http://www.reddit.com/button_info/'
+ 'name': u't1_c5999v7'
+ 'reddit_session': <reddit.Reddit object at 0x02E2F0D0>
+ 'dest': u'DailyPromptBot'
+ '_populated': True
+ 'created': 1341413186.0
+ 'created_utc': 1341387986.0
+ 'body_html': u'&lt;!-- SC_OFF --&gt;&lt;div class="md"&gt;&lt;p&gt;This is a test comment.&lt;/p&gt;\n&lt;/div&gt;&lt;!-- SC_ON --&gt;'
+ 'subreddit': <reddit.objects.Subreddit object at 0x0306B7F0>
+ '_submission': None
+ 'parent_id': None
+ 'author': <reddit.objects.Redditor object at 0x0306B9F0>
+ 'context': u'/r/ircwritingchallenge/comments/w0u3k/this_is_a_test_post_for_some_botapi_stuff_for_an/c5999v7?context=3'
+ 'new': True
+ '_replies': None
+ 'subject': u'post reply'
+ 'id': u'c5999v7'
+ '_underscore_names': ['replies']}
+ 
+{'body': u'This is a test reply.'
+ 'was_comment': True
+ 'first_message': None
+ '_info_url': 'http://www.reddit.com/button_info/'
+ 'name': u't1_c5999hv'
+ 'reddit_session': <reddit.Reddit object at 0x02E2F0D0>
+ 'dest': u'DailyPromptBot'
+ '_populated': True
+ 'created': 1341413108.0
+ 'created_utc': 1341387908.0
+ 'body_html': u'&lt;!-- SC_OFF --&gt;&lt;div class="md"&gt;&lt;p&gt;This is a test reply.&lt;/p&gt;\n&lt;/div&gt;&lt;!-- SC_ON --&gt;'
+ 'subreddit': <reddit.objects.Subreddit object at 0x0306BC30>
+ '_submission': None
+ 'parent_id': u't4_c5999cp'
+ 'author': <reddit.objects.Redditor object at 0x0306BC50>
+ 'context': u'/r/ircwritingchallenge/comments/ss1hi/0427_to_0504_prompt_suggestions/c5999hv?context=3'
+ 'new': True
+ '_replies': None
+ 'subject': u'comment reply'
+ 'id': u'c5999hv'
+ '_underscore_names': ['replies']}
+ 
+{'body': u'you sexy sexy thing'
+ 'was_comment': False
+ 'first_message': None
+ '_info_url': 'http://www.reddit.com/button_info/'
+ 'name': u't4_cofpj'
+ 'reddit_session': <reddit.Reddit object at 0x02E2F0D0>
+ 'dest': u'DailyPromptBot'
+ '_populated': True
+ 'created': 1341169449.0
+ 'created_utc': 1341169449.0
+ 'body_html': u'&lt;!-- SC_OFF --&gt;&lt;div class="md"&gt;&lt;p&gt;you sexy sexy thing&lt;/p&gt;\n&lt;/div&gt;&lt;!-- SC_ON --&gt;'
+ 'subreddit': None
+ 'parent_id': None
+ 'author': <reddit.objects.Redditor object at 0x0306BC90>
+ 'context': u''
+ 'replies': []
+ 'new': True
+ 'subject': u'hello'
+ 'id': u'cofpj'
+ '_underscore_names': None}
+#!/usr/bin/env python
+#-------------------------------------------------------------------------------
+# The Daily Prompt Mini-Bot - A Shut Up and Write Project
+# Version 0.0.1a
+# Author: Marc-Alexandre Chan <laogeodritt at arenthil.net>
+#-------------------------------------------------------------------------------
+#
+# Copyright (c) 2012 Marc-Alexandre Chan. Licensed under the GNU GPL version 3
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+#-------------------------------------------------------------------------------
+
+""" Daemon bootstrap script. """
+
+from minibot.minibot import DailyPromptMinibot
+
+from daemon.runner import DaemonRunner
+
+def main():
+    pass
+
+if __name__ == '__main__':
+    main()

File minibot/COPYING

+                    GNU GENERAL PUBLIC LICENSE
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+party means to make such an agreement or commitment not to enforce a
+patent against the party.
+
+  If you convey a covered work, knowingly relying on a patent license,
+and the Corresponding Source of the work is not available for anyone
+to copy, free of charge and under the terms of this License, through a
+publicly available network server or other readily accessible means,
+then you must either (1) cause the Corresponding Source to be so
+available, or (2) arrange to deprive yourself of the benefit of the
+patent license for this particular work, or (3) arrange, in a manner
+consistent with the requirements of this License, to extend the patent
+license to downstream recipients.  "Knowingly relying" means you have
+actual knowledge that, but for the patent license, your conveying the
+covered work in a country, or your recipient's use of the covered work
+in a country, would infringe one or more identifiable patents in that
+country that you have reason to believe are valid.
+
+  If, pursuant to or in connection with a single transaction or
+arrangement, you convey, or propagate by procuring conveyance of, a
+covered work, and grant a patent license to some of the parties
+receiving the covered work authorizing them to use, propagate, modify
+or convey a specific copy of the covered work, then the patent license
+you grant is automatically extended to all recipients of the covered
+work and works based on it.
+
+  A patent license is "discriminatory" if it does not include within
+the scope of its coverage, prohibits the exercise of, or is
+conditioned on the non-exercise of one or more of the rights that are
+specifically granted under this License.  You may not convey a covered
+work if you are a party to an arrangement with a third party that is
+in the business of distributing software, under which you make payment
+to the third party based on the extent of your activity of conveying
+the work, and under which the third party grants, to any of the
+parties who would receive the covered work from you, a discriminatory
+patent license (a) in connection with copies of the covered work
+conveyed by you (or copies made from those copies), or (b) primarily
+for and in connection with specific products or compilations that
+contain the covered work, unless you entered into that arrangement,
+or that patent license was granted, prior to 28 March 2007.
+
+  Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+  12. No Surrender of Others' Freedom.
+
+  If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot convey a
+covered work so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you may
+not convey it at all.  For example, if you agree to terms that obligate you
+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+  13. Use with the GNU Affero General Public License.
+
+  Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU Affero General Public License into a single
+combined work, and to convey the resulting work.  The terms of this
+License will continue to apply to the part which is the covered work,
+but the special requirements of the GNU Affero General Public License,
+section 13, concerning interaction through a network will apply to the
+combination as such.
+
+  14. Revised Versions of this License.
+
+  The Free Software Foundation may publish revised and/or new versions of
+the GNU General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.

File minibot/DailyPrompt-minibot.psproj

+[PyScripter]
+Version=2.5.3.0
+
+[Project]
+ClassName=TProjectRootNode
+StoreRelativePaths=TRUE
+ShowFileExtensions=TRUE
+
+[Project\ChildNodes\Node0]
+ClassName=TProjectFilesNode
+
+[Project\ChildNodes\Node0\ChildNodes\Node0]
+ClassName=TProjectFolderNode
+Name=config
+
+[Project\ChildNodes\Node0\ChildNodes\Node0\ChildNodes\Node0]
+ClassName=TProjectFileNode
+FileName=$[Project-Path]minibot.ini.default
+
+[Project\ChildNodes\Node0\ChildNodes\Node0\ChildNodes]
+Count=1
+
+[Project\ChildNodes\Node0\ChildNodes\Node1]
+ClassName=TProjectFolderNode
+Name=docs
+
+[Project\ChildNodes\Node0\ChildNodes\Node1\ChildNodes\Node0]
+ClassName=TProjectFileNode
+FileName=$[Project-Path]commands.txt
+
+[Project\ChildNodes\Node0\ChildNodes\Node1\ChildNodes\Node1]
+ClassName=TProjectFileNode
+FileName=$[Project-Path]COPYING
+
+[Project\ChildNodes\Node0\ChildNodes\Node1\ChildNodes\Node2]
+ClassName=TProjectFileNode
+FileName=D:\Projects\Software\DailyPrompt\data\orangereds.txt
+
+[Project\ChildNodes\Node0\ChildNodes\Node1\ChildNodes\Node3]
+ClassName=TProjectFileNode
+FileName=$[Project-Path]README
+
+[Project\ChildNodes\Node0\ChildNodes\Node1\ChildNodes]
+Count=4
+
+[Project\ChildNodes\Node0\ChildNodes\Node2]
+ClassName=TProjectFileNode
+FileName=$[Project-Path]../minibot.py
+
+[Project\ChildNodes\Node0\ChildNodes\Node3]
+ClassName=TProjectFileNode
+FileName=$[Project-Path]__init__.py
+
+[Project\ChildNodes\Node0\ChildNodes\Node4]
+ClassName=TProjectFileNode
+FileName=$[Project-Path]config.py
+
+[Project\ChildNodes\Node0\ChildNodes\Node5]
+ClassName=TProjectFileNode
+FileName=$[Project-Path]db.py
+
+[Project\ChildNodes\Node0\ChildNodes\Node6]
+ClassName=TProjectFileNode
+FileName=$[Project-Path]events.py
+
+[Project\ChildNodes\Node0\ChildNodes\Node7]
+ClassName=TProjectFileNode
+FileName=$[Project-Path]minibot.py
+
+[Project\ChildNodes\Node0\ChildNodes\Node8]
+ClassName=TProjectFileNode
+FileName=D:\Projects\Software\ScrivBot\pyGBot\pyGBot\util.py
+
+[Project\ChildNodes\Node0\ChildNodes]
+Count=9
+
+[Project\ChildNodes\Node1]
+ClassName=TProjectRunConfiguationsNode
+
+[Project\ChildNodes]
+Count=2
+
+[Project\ExtraPythonPath]
+Count=0
+

File minibot/README

+The Daily Prompt Mini-Bot - A Shut Up and Write Project
+Version 0.0.1a
+
+Author: Marc-Alexandre Chan <laogeodritt at arenthil.net>
+
+Copyright (c) 2012 Marc-Alexandre Chan. Licensed under the GNU General Public
+License version 3.0 or, at your option, any later version. See the COPYING file
+included with this program.
+
+For The Daily Prompt <http://reddit.com/r/thedailyprompt>
+        A Shut Up and Write Project <http://reddit.com/r/shutupandwrite>
+
+This application is the first step to automation of daily fiction-writing
+prompts on The Daily Prompt reddit. It serves to check a reddit account's
+private (generally a dedicated bot account), messages collect writing prompts
+sent to it by authorized users (mods of a subreddit), queue them according to
+the specified date, and post queued writing prompts at midnight on the specified
+date.
+
+Two scripts are provided in the root directory of this archive (NOT in the
+minibot directory) to execute this application.
+
+The minibotd.py script will run the bot as a daemon on UNIX-like systems. The
+minibot.py script will run it as a general application.
+
+minibotd.py takes one argument with the value "start", "stop" or "restart". For
+example, to start the Mini-Bot as a daemon, while in the root directory,
+type "./minibotd start" at the terminal.
+
+Windows users must use the minibot.py script (execute without arguments). The
+application may be safely stopped by typing Ctrl+C into the command-line or
+terminal window on both UNIX-like and Windows systems. It is possible to use
+pythonw.exe instead of python.exe to avoid spawning a command line window, but
+no method for stopping the process is provided.

File minibot/__init__.py

+

File minibot/commands.txt

+Welcome to The Daily Prompt Bot! I'm the management bot for r/TheDailyPrompt. My
+duties include managing a queue of prompts, posting prompts daily, and posting
+suggestion threads weekly.
+
+___
+
+## 1 Private Message Command Format
+
+You can communicate with me to add or update entries in my prompt queue and
+check my prompt queue by PMing me commands. An example of the private message
+command format follows. (The formal specification is included at the end of
+this message for reference).
+
+For example:
+
+**Subject:** add
+
+**Body:**
+
+    user=WriterPerson
+    date=2012-12-21
+    time=15:11:11
+    title=The huge mirror
+
+    There's a HUGE mirror. Blah blah character blah?
+
+Note that you must _only_ use single newlines between parameters, even though
+single newlines do not appear in the message after you send it (it'll look like
+one big line/paragraph). A double newline indicates the end of the parameters
+and the beginning of the "text block" parameter (e.g. for the text of the prompt
+to add or update in the queue).
+
+The date/time are in the server's local time, which is the U.S. Eastern Time
+(with Daylight Savings Time applied according to the U.S. dates).
+
+___
+
+## 2 Commands
+
+The commands and their parameters are specified as follows:
+
+### add
+
+Adds a prompt to the queue.
+
+* **user** Optional. The Reddit username of the user who submitted the prompt.
+* **submission** Optional. The permalink to the original prompt suggestion's
+  comment.
+* **date** Optional. The date on which this prompt must be posted, in the format
+YYYY-MM-DD. If not specified, the nearest future date on which a prompt is not
+scheduled will be used.
+* **time** Optional. The time at which this prompt must be posted, in the format
+    hh:mm:ss or hh:mm (24-hour format) or hh:mm:ssx or hh:mmx (12-hour format, x
+    is either 'am' or 'pm'). If not specified, a default value specified in the
+    configuration will be used. The timezone is set in the configuration file.
+    Time accuracy is not guaranteed to more than 1-3x times the ``refresh_rate``
+    option (more if Reddit servers are being slow).
+* **title**
+    The title of the prompt. Keep it short, since it will be wrapped in
+    meta-data text on the actual Reddit post (e.g. "Prompt for <date>:
+    <title>").
+* **(text block)**
+    The prompt text itself. This makes up the major part of the self.post
+    (along with metadata such as date and submitter info).
+
+### delete
+
+Removes a prompt from the queue. The bot will respond with confirmation
+of the removal and the prompt's full data.
+
+* **id**
+    Optional. Prompt ID, as obtained from the `list` command. If not
+    specified, the last added prompt is removed.
+
+### update
+
+Changes a prompt in the queue. Parameters that are not specified are left
+unchanged.
+
+* **id**
+    Same as for `delete`.
+* **user**
+    Optional. Same as for `add`.
+* **submission**
+    Optional. Same as for `add`.
+* **date**
+    Optional. Same as for `add`.
+* **time**
+    Optional. Same for as `add`.
+* **title**
+    Optional. Same as for `add`.
+* **(text block)**
+    Optional. Same as for `add`.
+
+### list
+
+Reply with a list containing the prompt queue. Results are always
+returned in chronological order of (scheduled) post time unless ``by_id``
+is ``true``.
+
+* **id**
+    Optional. A specific id to search for, or a list of ids to search for
+    (space- or comma-delimited). Overrides all other parameters except
+    short_entry, by_id and limit.
+* **past**
+    Optional. If ``true``, include past prompts. If ``false``, show only
+    future prompts. Default: ``false``.
+* **start_date**
+    Optional. The earliest date to return results for. Same syntax as for
+    `add`'s `date` parameter.
+* **end_date**
+    Optional. The latest date to return results for. Same syntax as for
+    `add`'s `date` parameter.
+* **user**
+    Optional. The name of a submitter to search for.
+* **approver**
+    Optional. The name of the user who approved/added the prompt to the
+    queue.
+* **short_entry**
+    Optional. If ``true``, show abridged information in a tabular format and
+    only display an excerpt of the prompt. If ``false``, show the full data
+    in block format, including the full text of the prompt. Default:
+    ``true``.
+* **by_id**
+    Optional. If ``true``, orders entries by ``id`` instead of by post
+    date. Default: ``false``.
+* **limit**
+    Optional. The maximum number of results to return. Default: 30. This
+    parameter cannot exceed its default value.
+
+### help
+
+Returns this help message.
+
+___
+
+## Appendix A Private Message Command Specification
+
+1. The subject line of the message shall be the command name.
+2. a. The message may specify additional parameters, one per line.
+   b. Exactly one parameter shall be specified per additional line. A blank line
+      between parameters is not permitted.
+   c. Parameters not marked 'optional' for a given command must be specified.
+   d. Parameter lines shall take the form `name: value` or `name = value`.
+      Whitespace rules are defined in (3).
+   e. Parameter values may contain the characters `:` and `=`, but shall not
+      contain newlines.
+3. a. Whitespace shall be ignored at the beginning or end of the message, at the
+      beginning and end of a line, and around the characters `:` and `=` when
+      used to specify an attribute.
+   b. Whitespace shall be maintained within within a parameter's value.
+4. a. A command may optionally specify a "text block" parameter.
+   b. A text block must be identified by two newlines after a parameter line.
+   c. The text block constitutes the entirety of the text from the two newlines
+      described in (4b) to the end of the private message. Whitespace is handled
+      as in (3b).
+   d. The text block shall not formally named.
+   e. Parameters cannot be specified after a text block.
+5. All date and time parameters are in server local time. This should currently
+   be U.S. Eastern Time with Daylight Savings applied according to the U.S.
+   dates.

File minibot/config.py

+#-------------------------------------------------------------------------------
+# The Daily Prompt Mini-Bot - A Shut Up and Write Project
+# Author: Marc-Alexandre Chan <laogeodritt at arenthil.net>
+#-------------------------------------------------------------------------------
+#
+# Copyright (c) 2012 Marc-Alexandre Chan. Licensed under the GNU GPL version 3
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+#-------------------------------------------------------------------------------
+
+""" Configuration classes. """
+
+from ConfigParser import SafeConfigParser
+from logging import DEBUG, INFO, WARN, ERROR
+
+
+class Section(object):
+    """ Abstract class representing a configuration section. Defines a generic
+    constructor that loads a dictionary, as well as a method to collapse the
+    current settings into a dictionary. Generally, __init__ should be overridden
+    by derived classes with the prototype __init__(self, values_dict), and
+    should call Section's __init__ with its own default and allowed arguments
+    (if applicable).
+
+    Options are to be accessible within a section as an *attribute* of the
+    section object. Hence, get() and set() are meant for use by derived classes
+    for defining properties. """
+    def __init__(self, values_dict, default=dict(), allowed=None):
+        """ Load a ConfigParser.items()-style dictionary. Optionally pass a
+        dictionary containing default values and/or a list of allowed options.
+        """
+        self.options = {}
+        # first set defaults
+        for key, val in default.iteritems():
+            if allowed is None or key in allowed:
+                self._opts[key] = val
+
+        # then specified options to overwrite defaults if applicable
+        for key, val in values_dict.iteritems():
+            if allowed is None or key in allowed:
+                self._opts[key] = val
+
+    def items(self):
+        """ Return a ConfigParser.items()-style dictionary. """
+        return dict(self._opts)
+
+    def iteritems(self):
+        """ Return a generator for the options in the section. """
+        for opt, val in self._opts.iteritems():
+            yield (opt, val)
+
+    def get(self, name, typename=None):
+        """ Return the specified option `opt`, converted to `typename`.
+        `typename` may also be a callable that takes one parameter (the string
+        value of name OR the desired type/value) and returns the desired value.
+        For use by derived classes. """
+        return (typename(self._opts[name]) if typename is not None
+                                           else self._opts[name])
+
+    def set(self, name, value):
+        """ Set a specified option `opt` to `value`. For use by derived classes.
+        """
+        self._opts[name] = value
+
+
+class SMinibot(Section):
+    """ Represents the [minibot] section of the configuration file. """
+    def __init__(self, values_dict):
+        defaults = {'salt' : 'Write a little every day!',\
+                    'refresh_rate' : 10,\
+                    'queue_rate' : 15,\
+                    'msg_rate' : 10,\
+                    'msg_chunk' : 25,\
+                    'user_agent' : 'DailyPromptMinibot/Default (no operator)',\
+                    'pidfile_path' : 'minibot.pid',\
+                    'pidfile_timeout' : 300}
+        super().__init__(values_dict, defaults)
+
+    @property
+    def salt(self): return self.get('salt')
+    @property
+    def refresh_rate(self): return self.get('refresh_rate', int)
+    @property
+    def queue_rate(self): return self.get('queue_rate', int)
+    @property
+    def msg_rate(self): return self.get('msg_rate', int)
+    @property
+    def msg_chunk(self): return self.get('msg_chunk', int)
+    @property
+    def user_agent(self): return self.get('user_agent')
+
+    @property
+    def pidfile_path(self): return self.get('pidfile_path')
+    @property
+    def pidfile_timeout(self): return self.get('pidfile_timeout', int)
+
+
+class SEvents(Section):
+    """ Represents the [events] section of the configuration file. """
+    def __init__(self, values_dict):
+        defaults = {'default_time' : '00:00:00',
+                    'time_zone'    : '0'}
+
+    @property
+    def default_time(self): return self.get('default_time')
+    @property
+    def suggestions_time(self):
+        return self.get('suggestions_time')
+    @property
+    def suggestions_period(self):
+        return self.get('suggestions_period', int)
+
+
+
+class SLog(Section):
+
+    level_dict = {'DEBUG'   : DEBUG,
+                  'INFO'    : INFO,
+                  'WARN'    : WARN,
+                  'WARNING' : WARN,
+                  'ERROR'   : ERROR,
+                  ''        : WARN} # default is WARN
+
+    """ Represents the [log] section of the configuration file. """
+    def __init__(self, values_dict):
+        defaults = {'file' : 'minibot.log',\
+                    'db_file' : 'minibot-db.log',\
+                    'format' : None,\
+                    'date_format' : None,\
+                    'level' : levels_dict[''],\
+                    'db_level' : levels_dict['']}
+        super().__init__(values_dict, defaults)
+
+    @property
+    def file(self): return self.get('file')
+    @property
+    def db_file(self): return self.get('db_file')
+    @property
+    def format(self): return self.get('format')
+    @property
+    def date_format(self): return self.get('date_format')
+    @property
+    def level(self): return self.get('level', self._convert_level_string)
+    @property
+    def db_level(self): return self.get('db_level', self._convert_level_string)
+
+    def _convert_level_string(self, value):
+        """ Return a level value from its corresponding string, or the default
+        logging value if the current value is invalid. """
+        return self.levels_dict.get(value.upper(), self.levels_dict[''])
+
+
+class SSqlite(Section):
+    """ Represents the [sqlite] section of the configuration file. """
+    def __init__(self, values_dict):
+        defaults = {'file' : 'minibot.sql',\
+                    'tableprefix' : ''}
+        super().__init__(values_dict, defaults)
+
+    @property
+    def file(self): return self.get('file')
+    @property
+    def tableprefix(self): return self.get('tableprefix')
+
+
+class SReddit(Section):
+    """ Represents the [reddit] section of the configuration file. """
+    @property
+    def user(self): return self.get('user')
+    @property
+    def password(self): return self.get('password')
+    @property
+    def target(self): return self.get('target')
+    @property
+    def target_url(self): return 'http://reddit.com/r/' + self.target
+
+
+class SUsers(Section):
+    """ Represents the [users] section of the configuration file. """
+    def __init__(self, values_dict):
+        self.users = {}
+        for key, val in values_dict.iteritems():
+            self.users[key] = int(val)
+
+    def get_level(self, user):
+        return self.users[user]
+
+    def set_level(self, user, level):
+        self.users[user] = level
+
+    def list(self):
+        return self.users.keys()
+
+
+class Config(object):
+    """ Configuration class for Daily Prompt Mini-Bot. Options are readable
+    via ``config_object.section.option``. For the users section, see the
+    SUsers class. """
+
+    # A list of all sections expected in the configuration file and their
+    # related classes.
+    SECTIONS = {'minibot' : SMinibot, 'sqlite' : SSqlite,\
+                'reddit'  : SReddi  , 'users'  : SUsers}
+
+    def __init__(self, inifile='minibot.ini'):
+        parser = SafeConfigParser()
+        self.file = inifile
+        with open(inifile) as fpIni:
+            parser.readfp(fpIni)
+
+        for section in SECTIONS.iterkeys():
+            if parser.has_section(section):
+                self.__dict__[section] = \
+                    SECTIONS[section](parser.items(section, True))
+            else:
+                self.__dict__[section] = SECTIONS[section](dict())
+
+    def get_filename(self):
+        return self.file
+
+    def write(self, filepath=None):
+        """ Writes the current settings to a configuration file. ``file`` is
+        is a (relative or absolute) path to the configuration file to write;
+        if ``None``, the loaded INI file is written. """
+
+        if filepath is None:
+            filepath = self.file
+
+        with open(filepath) as fp_file:
+            self.writefp(fp_file)
+
+
+    def writefp(self, fp):
+        """ Writes the current settings to a configuration file. ``fp`` is a
+        file object. """
+        parser = SafeConfigParser()
+        for section in SECTIONS.iterkeys():
+            parser.add_section(section)
+
+            for opt, val in self.__dict__[section].items():
+                parser.set(section, opt, val)
+
+        parser.write(fp)

File minibot/db.py

+#-------------------------------------------------------------------------------
+# The Daily Prompt Mini-Bot - A Shut Up and Write Project
+# Author: Marc-Alexandre Chan <laogeodritt at arenthil.net>
+#-------------------------------------------------------------------------------
+#
+# Copyright (c) 2012 Marc-Alexandre Chan. Licensed under the GNU GPL version 3
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+#-------------------------------------------------------------------------------
+
+""" Database abstraction classes using the SQLAlchemy ORM module. """
+
+from sqlalchemy import create_engine, Column, SmallInteger, Integer, String,\
+    Unicode, UnicodeText, DateTime, Date, TIMESTAMP
+from sqlalchemy.orm import sessionmaker, relationship, backref
+from sqlalchemy.ext.declarative import declarative_base, DeclarativeMeta
+
+import hashlib.sha256
+import datetime
+import logging
+
+
+class TablePrefixer(DeclarativeMeta):
+    """ DeclarativeMeta class to add table prefix to table names, if applicable.
+    """
+
+    def __init__(self, classname, bases, dict_):
+        return DeclarativeMeta.__init__(self, classname, bases, dict_)
+
+        # TODO: get table prefixes working/runtime configurable without directly
+        # depending on the global config. gconfig does not exist now.
+        #if '__tablename__' in dict_ and gconfig.db.tableprefix != None:
+        #    newname = gconfig.db.tableprefix + self.__tablename__
+        #    self.__tablename__ = dict_['__tablename__'] = newname
+        #return DeclarativeMeta.__init__(self, classname, bases, dict_)
+
+Base = declarative_base(name='MinibotDatabase', metaclass=TablePrefixer)
+Session = sessionmaker()
+
+
+class User(Base):
+    """ A user of the minibot application. """
+    __tablename__ = 'users'
+    r_id      = Column(String(8), primary_key=True)
+    # https://github.com/reddit/reddit/blob/master/r2/r2/controllers/validator/validator.py
+    # line 906 user_rx (validation regex): max length is 20
+    uname     = Column(String(20), nullable=False)
+    registered= Column(Boolean(), nullable=False, default=False)
+    email     = Column(String(64), nullable=True, default='')
+
+    # use setPassword() to hash and set the password in the DB
+    _password = Column('password', String(64), nullable=False,\
+                      CheckConstraint('LENGTH(password) == 64'))
+
+    # posts - from Prompt.approver relationship
+
+    def __init__(self, r_id, uname, plain_password=None, email=None):
+        self.r_id = r_id
+        self.uname = uname
+        if plain_password:
+            self.registered = True
+            self.setPassword(plain_password)
+        else:
+            self.registered = False
+            self.setPassword('default') # won't be usable, registered=False
+
+        if email:
+            self.email = email
+
+    def __repr__(self):
+        return "<User({r_id}, '{uname}')>".format(r_id=self.r_id,\
+                                                  uname=self.uname)
+
+    def setPassword(self, password, salt=''):
+        self.password = hashlib.sha256(salt + password).hexdigest()
+
+
+class Prompt(Base):
+    """ A prompt and its related posting data (suggester, approver, status,
+    time posted/to post, etc.). Mapped class for SQLAlchemy. All time data is in
+    UTC. """
+    __tablename__ = 'prompts'
+    id          = Column(Integer(), primary_key=True, autoincrement=True)
+    status      = Column(SmallInteger(),
+        CheckConstraint('status>=0 AND status<=4'), nullable=False, default=0)
+    submit_time = Column('t_submit', TIMESTAMP(), nullable=False,
+                         default=datetime.utcnow)
+    post_time   = Column('t_post', TIMESTAMP(), nullable=True, default=None)
+    # https://github.com/reddit/reddit/blob/master/r2/r2/controllers/validator/validator.py
+    # line 906 user_rx (validation regex): max length is 20
+    user          = Column(Unicode(20), nullable=True, default=None)
+    r_user_id     = Column(String(8), nullable=True, default=None)
+    r_approver_id = Column(String(8), ForeignKey('users.r_id'), nullable=False)
+    r_post_id     = Column(String(8), nullable=True, default=None)
+    r_source_url  = Column(String(128), nullable=True, default=None)
+    source_thread_id = Column(String(8), ForeignKey('suggestion_threads.id'),
+                             nullable=True, default=None)
+    r_source_id   = Column(String(12), nullable=True, default=None)
+    title         = Column(Unicode(255), nullable=True, default=None)
+    text          = Column(UnicodeText(), nullable=False)
+
+    approver      = relationship('User',
+                    backref=backref('posts', order_by=post_time))
+    source_thread = relationship('SuggestionThread',
+                    backref=backref('prompts', order_by=post_time))
+
+    STATUS_TEXT = ['new', 'accepted', 'queued', 'posted', 'rejected']
+    STATUS_NEW      = 0
+    STATUS_ACCEPTED = 1
+    STATUS_QUEUED   = 2
+    STATUS_POSTED   = 3
+    STATUS_REJECTED = 4
+
+    def __init__(self, title, text, approver_id, submit_time=None,\
+                 user=None, user_id=None, source_url=None, source_thread=None,
+                 source_id=None):
+        self.status        = 0
+        self.title         = title
+        self.text          = text
+        self.submit_time   = submit_time if submit_time is not None\
+                             else datetime.utcnow()
+        self.user          = user
+        self.r_user_id     = user_id
+        self.r_approver_id = approver_id
+        self.r_source_url  = source_url
+        self.source_thread_id = source_thread
+        self.r_source_id   = source_id
+
+    def get_status_string(self):
+        return self.STATUS_TEXT[self.status]
+
+    def __repr__(self):
+        return "<Prompt({id_:d}, {status}, {tpost}, '{user}', '{approver}',"\
+               "'{title}', '{excerpt}')>".format(id_=self.id,
+                              status=STATUS_TEXT[self.status],
+                              tpost=self.post_time.__str__(),
+                              user=self.user,
+                              approver=self.approver.c.uname,
+                              title=self.title,
+                              excerpt=self.text[0:128]\
+                                     +('...' if len(self.text) > 128 else ''))
+
+
+class SuggestionThread(Base):
+    """ A prompt suggestion thread metadata, to track the posting and status
+    of suggestion threads (whether to cull data from it, etc.). All time data
+    is in UTC. """
+    __tablename__ = 'suggestion_threads'
+    id = Column(Integer(), primary_key=True, autoincrement=True)
+    time = Column(TIMESTAMP(), nullable=False, default=datetime.utcnow)
+    status = Column(SmallInteger(), CheckConstraint('status>=0 AND status<=2'),
+                    nullable=False, default=0)
+    r_post_id = Column(String(8), nullable=True, default=None)
+    scan_time = Column('t_scan', TIMESTAMP(), nullable=False,
+                       default=datetime.utcnow)
+    title = Column(Unicode(255), nullable=True, default=None)
+    text = Column(UnicodeText(), nullable=True)
+
+    STATUS_TEXT = ['queued', 'active', 'archived']
+    STATUS_QUEUED = 0
+    STATUS_ACTIVE = 1
+    STATUS_ARCHIV = 2
+
+    def __init__(self, time, is_active=True, **kwargs):
+        self.time      = time if time is not None else datetime.utcnow()
+        self.r_post_id = kwargs.get('r_post_id', None)
+        self.scan_time = kwargs.get('scan_time', datetime.utcnow())
+        self.title     = kwargs.get('title', None)
+        self.text      = kwargs.get('text', None)
+
+        if self.r_post_id != None:
+            if is_active:
+                self.status = self.STATUS_ACTIVE
+            else:
+                self.status = self.STATUS_ARCHIV
+        else:
+            self.status = self.STATUS_QUEUED
+
+    def __repr__(self):
+        return "<SuggestionThread({time_}, {status}, '{post_id}', {scan_time}, "\
+               "'{title}', '{excerpt}')>".format(time_=self.time.__str__(),
+                              status=STATUS_TEXT[self.status],
+                              post_id=self.r_post_id,
+                              scan_time=self.scan_time.__str__(),
+                              title=self.title,
+                              excerpt=self.text[0:128]\
+                                     +('...' if len(self.text) > 128 else ''))
+
+class Database(object):
+    """ Database management class. Abstracts away the SQLAlchemy engine and
+    logging configuration and provides some hooks to the engine.
+
+    =================
+    Public attributes
+    =================
+
+    engine
+        SQLAlchemy engine for the SQLite database.
+
+    base
+        A reference to the declarative base.
+    """
+    def __init__(self, dbfile='minibot.sqlite', **kwargs):
+        """ Constructor. Set up parameters, engine, base, and logging.
+
+        ==========
+        Parameters
+        ==========
+
+        dbfile
+            *Default: minibot.sqlite (current directory)*
+
+            SQLite database file. Relative or absolute path.
+
+        logfile
+            *Default: minibot-db.log (current directory)*
+
+            SQL log file location.
+
+        loglevel
+            *Default: logging.WARN*
+
+            Logging level. Either one of the ``logging`` module's levels (ERROR,
+            WARN, INFO, DEBUG), or a dict associating an SQLAlchemy component
+            string to a logging level. Components are: 'engine', 'dialects',
+            'pool' and 'orm'. INFO and DEBUG enable logging, while all higher
+            levels disable it. See the `SQLAlchemy documentation`_.
+
+        .. _`SQLAlchemy documentation`: http://docs.sqlalchemy.org/en/rel_0_7/core/engines.html#configuring-logging
+
+        logformat
+            *Default: '%(asctime)s:%(name)s[%(process)d] %(levelname)s %(message)s'
+
+            Format for log entries. See the Python library's
+            ``logging.Formatter`` documentation.
+
+        dateformat
+            *Default: ISO8601 format.*
+
+            Date/time format for log entries. See the Python library's
+            ``logging.Formatter`` documentation.
+
+        table_prefix
+            *Default: None*
+
+            Table prefix. String to prepend to every table name in the database.
+            """
+        # declaration  of instance attributes
+        # objects/components
+        self.engine      = None
+        self.base        = None
+        self._loghandler = None
+
+        # parameters
+        self.table_prefix = kwargs.get('table_prefix', None)
+        self._dbfile = dbfile
+        self._logfile = kwargs.get('logfile', 'minibot-db.log')
+        self._loglevel = kwargs.get('loglevel', logging.WARN)
+
+        # create engine, base, session; bind as needed
+        self.base = Declarative
+        self.engine = create_engine('sqlite:///' + dbfile, echo=False)
+        self.base.metadata.bind = self.engine
+
+        # set up logging
+        logging.basicConfig() # in case this hasn't been configured
+        self._loghandler = logging.FileHandler(self._logfile, encoding='utf8')
+        fmtr = logging.Formatter(kwargs.get('logformat',\
+                '%(asctime)s:%(name)s[%(process)d] %(levelname)s %(message)s'),\
+            kwargs.get('dateformat', None))
+        self._loghandler.setFormatter(fmtr)
+
+        # if loglevel is a dict, assign handler to each
+        try:
+            for logname, loglevel in self._loglevel.itervalues():
+                theLogger = None
+                if logname == 'sqlalchemy':
+                    theLogger = logging.getLogger(logname)
+                elif logname in ['engine', 'dialects', 'pool', 'orm']:
+                    theLogger = logging.getLogger('sqlalchemy.' + logname)
+
+                if theLogger is not None:
+                    theLogger.addHandler(self._loghandler)
+                    theLogger.setLevel(loglevel)
+        except AttributeError: # not a dict, so just assign to sqlalchemy
+            theLogger = logging.getLogger('sqlalchemy')
+            theLogger.addHandler(self._loghandler)
+            theLogger.setLevel(self._loglevel)
+
+    def __del__(self):
+        """ Destructor. Removes the log handler. Other resources held within
+        the object are deleted normally. """
+        try:
+            for logname, loglevel in self._loglevel.itervalues():
+                theLogger = None
+                if logname == 'sqlalchemy':
+                    theLogger = logging.getLogger(logname)
+                elif logname in ['engine', 'dialects', 'pool', 'orm']:
+                    theLogger = logging.getLogger('sqlalchemy.' + logname)
+
+                if theLogger is not None:
+                    theLogger.removeHandler(self._loghandler)
+        except AttributeError: # not a dict
+            theLogger = logging.getLogger('sqlalchemy')
+            theLogger.removeHandler(self._loghandler)
+
+    def create_tables(self, table_classes=None):
+        """ Create the specified tables.
+
+        ==========
+        Parameters
+        ==========
+
+        table_classes
+            List of mapped classes. If None, all mapped tables are created.
+        """
+        # table_classes = None (creates all); tables = [list of mapped classes]
+        table_objects = self._get_table_objects(table_classes)
+        self.base.metadata.create_all(tables=table_objects)
+
+    def drop_tables(self, table_classes=None):
+        """ Drop the specified tables.
+
+        ==========
+        Parameters
+        ==========
+
+        table_classes
+            List of mapped classes. If None, all tables are dropped.
+        """
+        table_objects = self._get_table_objects(table_classes)
+        self.base.metadata.drop_all(tables=table_objects)
+
+    def get_new_session(self):
+        """ Construct and return a new session. """
+        return Session(bind=self.engine)
+
+    def get_db_filename(self):
+        """ Return the database filename specified at construction. """
+        return self._dbfile
+
+    def _get_table_objects(self, mapped_classes=None):
+        """ Return a list of Table objects corresponding to a list of mapped
+        classes.
+
+        ==========
+        Parameters
+        ==========
+
+        mapped_classes
+            List of mapped classes. If None, None is returned. """
+
+        tables = None
+
+        if table_classes is not None:
+            tables = []
+            for mapped_class in mapped_classes:
+                tables.append(mapped_class.__table__)
+
+        return tables

File minibot/events.py

+#-------------------------------------------------------------------------------
+# The Daily Prompt Mini-Bot - A Shut Up and Write Project
+# Author: Marc-Alexandre Chan <laogeodritt at arenthil.net>
+#-------------------------------------------------------------------------------
+#
+# Copyright (c) 2012 Marc-Alexandre Chan. Licensed under the GNU GPL version 3
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+#-------------------------------------------------------------------------------
+
+""" Events and commands used by the Minibot event scheduler. """
+
+### EVENTS AND COMMANDS ###
+# Attributes (defaults may be given as a class attribute):
+# - required_res: optional. List of strings naming resources that must
+#       be passed from the event scheduler
+# - start_time: optional. Start timestamp for the event. If not specified or
+#       in the past, it is set to now/on the next iteration.
+# - interval: optional. Repetition interval (seconds). If not specified or 0,
+#       the event is assumed single-run.
+# - duration: optional. Maximum duration of event (seconds). 0 = single-run.
+#       -1 = infinite duration event. Only meaningful if interval is specified
+#       and non-zero.
+# - priority: default 100. If multiple events are scheduled to run simul-
+#       taneously, the one with the lowest priority value is run first.
+# - owner: set by the scheduler upon registration. Reference to the scheduler.
+# - res: set by the scheduler upon registration. A dict of resources listed in
+#       required_res. This is NOT available upon construction.
+# -
+# Required methods:
+# - start() - Called upon the first run of the event. Note that run() is NOT
+#       called at this run---if needed, call it in start(). For one-off events,
+#       only start() is called.
+# - run() - Run an event iteration. This is called after ``interval`` time,
+#       except when starting or ending the event.
+# - end() - Called upon termination of the event. This can occur between
+#       repetitions, and so run() is NOT called.
+# - handle_exception(exception) - Called upon an exception occurring within an
+#   event. Returns a boolean value -``true`` indicates a handled exception,
+#   ``false`` indicates an exception that could not be handled and that should
+#   be handled by the scheduler. (A scheduler may handle the exception by
+#   considering the event corrupt and dropping/logging it, or it may re-throw
+#   it). This method must not raise an exception.
+#
+# Note that res and owner are NOT available upon construction. Initialisation
+# relying on these two attributes should be executed in start().
+#
+# Valid resources:
+# - reddit - A reddit.Reddit() instance
+# - approved - A list of usernames for users approved to use the bot.
+# - dbsession - A database session. As long as dbsession is a required_res,
+#       a new session is created whenever res['dbsession'] is set to None or not
+#       set before any call to start(), run() or end(). It is the responsibility
+#       of the Event object to commit sessions when necessary.
+# - config.<section> - The object containing configuration info for <section>.
+#
+# Exception handling:
+# If an exception is thrown during a start(), run() or end() call, the exception
+# will be caught by the scheduler, logged, and then the event's
+# handle_exception() method is called with the exception object as the argument.
+# If the method returns ``true``, it is considered handled and the scheduler
+# will continue as normal. If the method returns ``false``, the exception is
+# considered passed on to the scheduler, which may handle it as it sees fit
+# (including considering the event corrupt and deleting it or reinitialising it,
+# or re-raising the exception). Under NO circumstances should handle_exception()
+# re-raise the exception or raise a new exception.
+
+
+from minibot import MinibotError
+from minibot.db import Prompt, User, SuggestionThread
+from minibot.util import DateParseMixin
+
+import reddit.objects.Inboxable
+
+from datetime import datetime
+from datetime import timedelta
+from calendar import timegm
+from urlparse import urlparse
+
+# TODO: logging
+# TODO: move format methods to the Prompt class, + get_url methods for submissions
+# TODO: fix prompt info output reply on Add/Update/???
+# TODO: error handling
+
+
+class CommandError(MinibotError):
+    """ Abstract base class for Command errors. """
+
+class CommandParseError(ValueError, CommandError):
+    """ Raised when an error occurs while parsing a command message. """
+    pass
+
+class CommandNameError(ValueError, CommandError):
+    """ Raised when a command message specifies a command which is invalid. """
+    pass
+
+class CommandParameterError(ValueError, CommandError):
+    """ Raised when a command message does not contain valid parameters. """
+    pass
+
+class MissingParameterError(KeyError, CommandError):
+    """ Raised when a required command parameter is not passed in a command
+    message. """
+    pass
+
+class CommandBase(object):
+    """ Abstract base class for command events (single-shot events).
+
+    Defaults:
+        * ``start_time`` = 0 (immediately)
+        * ``duration`` = 0
+        * ``interval`` = 0
+
+        """
+    start_time = 0 # execute ASAP by default
+    duration = 0
+    interval = 0
+    def start(): pass
+    def end(): pass
+
+
+class CheckMessageEvent(object):
+    """ Event to check for new private messages, check whether the command is
+    valid and from an authorised user, and queues commands to execute.
+
+    Defaults:
+        * ``start_time`` = 0
+        * ``duration`` = -1
+        * ``interval`` = 10
+
+    """
+    required_res = ['reddit', 'approved', 'config.minibot']
+    start_time = 0
+    duration = -1
+    interval = 10
+
+    def __init__(self):
+        pass
+
+    def start(self):
+        self.reddit = self.res['reddit']
+        self.users = self.res['approved']
+        self.msg_chunk = self.res['config.minibot'].msg_chunk
+
+        self.run()
+
+    def run(self): # TODO: handle exceptions from _parse_message, _parse_field, _make_command, and reddit (?)
+        for msg in self.reddit.user.get_unread(limit=self.msg_chunk):
+            msg_command = None
+            # if a PM (no subreddit) and directly to the bot (not modmail)
+            # and from approved user, then attempt parsing message
+            if (msg.subreddit is None and msg.dest == reddit.user.name and
+                    msg.author.name in self.approved):
+                msg_data = self._parse_message(msg)
+                msg_command = self._make_command(msg, msg_data)
+            else: # bad message, ignore it
+                msg.mark_as_read()
+
+            if msg_command is not None:
+                self.owner.queue_event(msg_command)
+
+    def end(self):
+        pass
+
+    # command message parsing variables
+    PARSE_FIELD = 0
+    PARSE_TEXT = 1
+    PARSE_ERROR = -1
+    # dict of command_name : command_object - assigned at the end of the file
+    cmd_actions = dict()
+
+    def _parse_message(self, msg):
+        """ Parse a message's body text for a bot command. Returns a dict
+        containing the entries:
+
+        * 'action' = action name (e.g. add, rm, list)
+        * name = value (for parameters)
+        * 'text' = text block (if available)
+
+        No validation of the data is performed.
+
+        """
+        msg_data = {}
+        text_data = []
+
+        # set up parsing line-by-line
+        lineno = 0
+        lines = msg.body.splitlines()
+        state = PARSE_FIELD
+
+        for line in lines:
+            if state == self.PARSE_ERROR:
+                break
+
+            elif state == self.PARSE_FIELD:
+                # ignore whitespace around line
+                line = line.strip()
+                # if not blank, parse as field
+                if line:
+                    field_data = self._parse_field(line)
+                    msg_data[field_data[0].lower()] = field_data[1]
+                # else if blank line, denotes the start of text data
+                else:
+                    state = self.PARSE_TEXT
+
+            elif state == self.PARSE_TEXT:
+                text_data.append(line)
+
+        # get the command from the subject field
+        # at the end to overwrite any (erroneous) action field in body
+        msg_data['action'] = msg.subject.strip().lower()
+
+        if text_data:
+            msg_data['text'] = '\n'.join(text_data)
+
+        return msg_data
+
+    def _parse_field(self, line):
+        """ Parse a message line as a field. Returns a (fieldname, fieldval)
+        pair. Whitespace is stripped from each value. If the line is an invalid
+        parameter/field line, throws CommandParseError. """
+        eq_pos  = line.find('=')
+        col_pos = line.find(':')
+
+        if eq_pos < 1:
+            sep_pos = col_pos
+        elif col_pos < 1:
+            sep_pos = eq_pos
+        else:
+            sep_pos = min(eq_pos, col_pos)
+
+        field_data = (line[0:sep_pos].strip(), line[sep_pos:].strip())
+
+        # check for valid data extracted
+        if not field_data[0]:
+            raise CommandParseError(
+                    ''.join(["No parameter name in line: \"", line, "\""]))
+        #elif not field_data[1] or sep_pos == -1:
+        #    raise CommandParseError(
+        #            ''.join(["No parameter value in line: \"", line, "\""]))
+
+        return field_data
+
+    def _make_command(self, msg, data):
+        """ Builds a bot command object from ``_parse_message()``'s message
+        data. If the command name is invalid, raises a CommandNameError. If the
+        command parameters are invalid or incomplete, raises a
+        CommandParametersError (from the command constructor). """
+        if data['action'] in self.cmd_actions.keys():
+            CommandClass = self.cmd_actions[data.pop('action')]
+            cmd_obj = CommandClass(msg, **data)
+        else:
+            raise CommandNameError(
+                    ''.join(["Unknown command '", data['action'], "'."]))
+        return cmd_obj
+
+
+class CheckPostQueueEvent(object):
+    """ Event to check the current post queue for the next post.
+
+    Defaults:
+        * ``start_time`` = 0
+        * ``duration`` = -1
+        * ``interval`` = 5
+
+    """
+    required_res = ['dbsession', 'config.minibot']
+    interval = 5
+    duration = -1
+
+    def __init__(self):
+        pass
+
+    def start(self):
+        self.queue_rate = res['config.minibot'].queue_rate
+        self.run()
+        return
+
+    def run(self):
+        self.db = self.res['dbsession']
+
+        dt_now = datetime.utcnow()
+        dt_limit = dt_now + timedelta(seconds=2*self.queue_rate)
+
+        self._check_prompts(dt_now, dt_limit)
+        self._check_suggestion_threads(dt_now, dt_limit)
+
+    def end(self):
+        pass
+
+    def _check_prompts(self, dt_now, dt_limit):
+        """ Check for prompts in the queue to be posted before ``dt_limit`` (to
+        a maximum of the value of the ``queue_rate`` option). If any are found,
+        they are queued in the event scheduler for posting. """
+        queued_ids = [ev.post_id for ev in
+                      self.owner.get_events(PostPromptCommand)]
+
+        for id_, t_post in self.db.query(Prompt.id, Prompt.post_time).\
+                filter(Prompt.post_time <= dt_limit).\
+                filter(Prompt.status == Prompt.STATUS_QUEUED).\
+                order_by(Prompt.post_time)[0:int(self.queue_rate)]:
+            if id_ not in queued_id:
+                new_cmd = PostPromptCommand(id_, t_post)
+                self.owner.queue_event(new_cmd)
+
+    def _check_suggestion_threads(self, dt_now, dt_limit):
+        """ Check for sugestion threads in the queue to be posted before
+        ``dt_limit`` (to a maximum of the value of the ``queue_rate`` option).
+        If any are found, they are queued in the event scheduler for
+        posting. """
+        queued_ids = [ev.post_id for ev in
+                        self.owner.get_events(PostSuggestionThreadCommand)]
+
+        for id_, t_post in\
+                self.db.query(SuggestionThread.id, SuggestionThread.time).\
+                filter(SuggestionThread.time <= dt_limit).\
+                filter(SuggestionThread.status==SuggestionThread.STATUS_QUEUED).\
+                order_by(SuggestionThread.time)[0:int(self.queue_rate)]:
+            if id_ not in queued_ids:
+                new_cmd = PostSuggestionThreadCommand(id_, t_post)
+                self.owner.queue_event(new_cmd)
+
+class SuggestionThreadQueueMaintainer(object):
+    """ Skeleton event for the Minibot form of the bot. This event checks the
+    current Suggestion Threads queue, and when no suggestion threads are queued,
+    queues one the specified number of days after the previous one, at the
+    time specified at construction.
+
+    Defaults:
+        * ``start_time`` = 0 (immediately)
+        * ``duration`` = -1
+        * ``interval`` = 300
+
+        """
+    required_res = ['reddit']
+    start_time = 0
+    duration = -1
+    interval = 300
+    # TODO - also have it add an initial one if needed
+
+class AddPromptCommand(CommandBase, DateParseMixin):
+    """ Command to add a prompt to the queue.
+
+    Defaults:
+        * ``start_time`` = 0 (immediately)
+        * ``duration`` = 0
+        * ``interval`` = 0
+
+        """
+    # TODO: Clean up repetition of UpdatePromptCommand & very long methods
+    required_res = ['reddit', 'dbsession', 'config.events', 'config.reddit']
+    start_time = 0 # execute ASAP
+
+    def __init__(self, msg, **kwargs):
+        """ Constructor. Keyword arguments are strings defined as per the
+        `CheckCommandSpec` class documentation; the text block is expected as
+        a 'text' argument. Throws MissingParameterError or CommandParameterError
+        on missing or invalid parameters (respectively). """
+
+        self.msg = msg
+
+        # required params
+        try:
+            self.text  = kwargs.pop('text')
+        except KeyError:
+            raise MissingParameterError(
+                "The required 'text block' parameter is missing.")
+
+        # optional params
+        self.user = kwargs.pop('user', None)
+        self.submission = kwargs.pop('submission', None)
+        self.title = kwargs.pop('title', '')
+
+        str_date = kwargs.pop('date', None)
+        str_time = kwargs.pop('time', None)
+        if hasattr(str_date, 'strip'): str_date = str_date.strip()
+        if has_attr(str_time, 'strip'): str_time = str_time.strip()
+        self.datetime = _parse_datetime(str_date, str_time)
+        self.date_default = (str_date is None)
+        self.time_default = (str_time is None)
+
+        # if parameters left over, they're not valid
+        if len(kwargs):
+            if len(kwargs) == 1:
+                raise CommandParameterError(
+                    "Unknown parameter: '" + kwargs.keys()[0])
+            else:
+                raise CommandParameterError(
+                    "Unknown parameters: '" + ', '.join(kwargs.keys()))
+
+    def start(self):
+        # resources
+        reddit = self.res['reddit']
+        db     = self.res['dbsession']
+        default_time_str = self.res['config.events'].default_time
+        target_reddit = self.res['config.reddit'].target
+
+        ### process default and inferred Prompt attributes ###
+        # status
+        status = Prompt.STATUS_QUEUED
+
+        # post_time
+        if self.date_default and self.time_default:
+            default_date = self._get_autodate()
+            default_time = self._parse_datetime(default_time_str)
+            self.datetime = datetime.combine(default_date, default_time)
+        elif self.date_default:
+            # in this case, self.datetime is a dt_time object instead
+            default_date = self._get_autodate()