Merge branch 'pflarr'

.gitignore

@@ -2,6 +2,7 @@
 *#
 *.pyc
 *.o
+.idea
 ./bin/
 build/
 cache/

devel-server.py

@@ -8,11 +8,9 @@ import pathlib
 import puzzles
 import socketserver
 
-
-#HTTPStatus = http.server.HTTPStatus
-if hasattr(http.server, 'HTTPStatus'):
-    HTTPStatus = http.HTTPStatus
-else:
+try:
+    from http.server import HTTPStatus
+except ImportError:
     class HTTPStatus:
         NOT_FOUND = 404
         OK = 200
@@ -31,6 +29,7 @@ def page(title, body):
   </body>
 </html>""".format(title, body)
 
+
 def mdpage(body):
     try:
         title, _ = body.split('\n', 1)
@@ -44,6 +43,7 @@ def mdpage(body):
 class ThreadingServer(socketserver.ThreadingMixIn, http.server.HTTPServer):
     pass
 
+
 class MothHandler(http.server.CGIHTTPRequestHandler):
     def do_GET(self):
         if self.path == "/":
@@ -144,6 +144,7 @@ you are a fool.
         self.end_headers()
         self.wfile.write(content.encode('utf-8'))
 
+
 def run(address=('', 8080)):
     httpd = ThreadingServer(address, MothHandler)
     print("=== Listening on http://{}:{}/".format(address[0] or "localhost", address[1]))

puzzles.py

@@ -1,29 +1,105 @@
 #!/usr/bin/python3
 
-import hmac
-import base64
 import argparse
+from collections import defaultdict, namedtuple
 import glob
-import json
-import os
+import hashlib
+from importlib.machinery import SourceFileLoader
 import mistune
+import os
 import random
+import tempfile
 
 messageChars = b'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'
 
+
 def djb2hash(buf):
     h = 5381
     for c in buf:
         h = ((h * 33) + c) & 0xffffffff
     return h
 
-class Puzzle:
-    def __init__(self, stream):
-        self.message = bytes(random.choice(messageChars) for i in range(20))
-        self.fields = {}
-        self.answers = []
-        self.hashes = []
+# We use a named tuple rather than a full class, because any random name generation has
+# to be done with Puzzle's random number generator, and it's cleaner to not pass that around.
+PuzzleFile = namedtuple('PuzzleFile', ['path', 'handle', 'name', 'visible'])
 
+class Puzzle:
+
+    KNOWN_KEYS = [
+        'file',
+        'resource',
+        'temp_file',
+        'answer',
+        'points',
+        'author',
+        'summary'
+    ]
+    REQUIRED_KEYS = [
+        'author',
+        'answer',
+        'points'
+    ]
+    SINGULAR_KEYS = [
+        'points'
+    ]
+
+    # Get a big list of clean words for our answer file.
+    ANSWER_WORDS = [w.strip() for w in open(os.path.join(os.path.dirname(__file__),
+                                                         'answer_words.txt'))]
+
+    def __init__(self, path, category_seed):
+        super().__init__()
+
+        self._dict = defaultdict(lambda: [])
+        if os.path.isdir(path):
+            self._puzzle_dir = path
+        else:
+            self._puzzle_dir = None
+        self.message = bytes(random.choice(messageChars) for i in range(20))
+        self.body = ''
+
+        if not os.path.exists(path):
+            raise ValueError("No puzzle at path: {]".format(path))
+        elif os.path.isfile(path):
+            try:
+                # Expected format is path/<points_int>.moth
+                self['points'] = int(os.path.split(path)[-1].split('.')[0])
+            except (IndexError, ValueError):
+                raise ValueError("Invalid puzzle config. "
+                                 "Expected something like <point_value>.moth")
+
+            stream = open(path)
+            self._read_config(stream)
+        elif os.path.isdir(path):
+            try:
+                # Expected format is path/<points_int>.moth
+                self['points'] = int(os.path.split(path)[-1])
+            except (IndexError, ValueError):
+                raise ValueError("Invalid puzzle config. Expected an integer point value for a "
+                                 "directory name.")
+
+            files = os.listdir(path)
+
+            if 'config.moth' in files:
+                self._read_config(open(os.path.join(path, 'config.moth')))
+
+            if 'make.py' in files:
+                # Good Lord this is dangerous as fuck.
+                loader = SourceFileLoader('puzzle_mod', os.path.join(path, 'make.py'))
+                puzzle_mod = loader.load_module()
+                if hasattr(puzzle_mod, 'make'):
+                    puzzle_mod.make(self)
+        else:
+            raise ValueError("Unacceptable file type for puzzle at {}".format(path))
+
+        self._seed = hashlib.sha1(category_seed + bytes(self['points'])).digest()
+        self.rand = random.Random(self._seed)
+
+        # Set our 'files' as a dict, since we want register them uniquely by name.
+        self['files'] = dict()
+
+    def _read_config(self, stream):
+        """Read a configuration file (ISO 2822)"""
         body = []
         header = True
         for line in stream:
@@ -35,34 +111,120 @@ class Puzzle:
                 key, val = line.split(':', 1)
                 key = key.lower()
                 val = val.strip()
-                self._add_field(key, val)
+                self[key] = val
             else:
                 body.append(line)
         self.body = ''.join(body)
 
-    def _add_field(self, key, val):
+    def random_hash(self):
+        """Create a random hash from our number generator suitable for use as a filename."""
+        return hashlib.sha1(str(self.rand.random()).encode('ascii')).digest()
+
+    def _puzzle_file(self, path, name, visible=True):
+        """Make a puzzle file instance for the given file.
+        :param path: The path to the file
+        :param name: The name of the file. If set to None, the published file will have
+                     a random hash as a name and have visible set to False.
+        :return:
+        """
+
+        # Make sure it actually exists.
+        if not os.path.exists(path):
+            raise ValueError("Included file {} does not exist.")
+
+        file = open(path, 'rb')
+
+        return PuzzleFile(path=path, handle=file, name=name, visible=visible)
+
+    def make_file(self, name=None, mode='rw+b'):
+        """Get a file object for adding dynamically generated data to the puzzle.
+        :param name: The name of the file for links within the puzzle. If this is None,
+        the file will be hidden with a random hash as the name.
+        :return: A file object for writing
+        """
+
+        file = tempfile.TemporaryFile(mode=mode, delete=False)
+
+        self._dict['files'].append(self._puzzle_file(file.name, name))
+
+        return file
+
+    def __setitem__(self, key, value):
+
+        if key in ('file', 'resource', 'hidden') and self._puzzle_dir is None:
+            raise KeyError("Cannot set a puzzle file for single file puzzles.")
+
         if key == 'answer':
-            h = djb2hash(val.encode('utf8'))
-            self.answers.append(val)
-            self.hashes.append(h)
+            # Handle adding answers to the puzzle
+            self._dict['hashes'].append(djb2hash(value.encode('utf8')))
+            self._dict['answers'].append(value)
+        elif key == 'file':
+            # Handle adding files to the puzzle
+            path = os.path.join(self._puzzle_dir, 'files', value)
+            self._dict['files'][value] = self._puzzle_file(path, value)
+        elif key == 'resource':
+            # Handle adding category files to the puzzle
+            path = os.path.join(self._puzzle_dir, '../res', value)
+            self._dict['files'].append(self._puzzle_file(path, value))
+        elif key == 'hidden':
+            # Handle adding secret, 'hidden' files to the puzzle.
+            path = os.path.join(self._puzzle_dir, 'files', value)
+            name = self.random_hash()
+            self._dict['files'].append(self._puzzle_file(path, name, visible=False))
+        elif key in self.SINGULAR_KEYS:
+            # These keys can only have one value
+            self._dict[key] = value
+        elif key in self.KNOWN_KEYS:
+            self._dict[key].append(value)
         else:
-            self.fields[key] = val
+            raise KeyError("Invalid Attribute: {}".format(key))
+
+    def __getitem__(self, item):
+        return self._dict[item]
+
+    def make_answer(self, word_count, sep=b' '):
+        """Generate and return a new answer. It's automatically added to the puzzle answer list.
+        :param int word_count: The number of words to include in the answer.
+        :param str|bytes sep: The word separator.
+        :returns: The answer bytes
+        """
+
+        if type(sep) == str:
+            sep = sep.encode('ascii')
+
+        answer = sep.join(self.rand.sample(self.ANSWER_WORDS, word_count))
+        self['answer'] = answer
+
+        return answer
+
 
     def htmlify(self):
         return mistune.markdown(self.body)
 
-    def publish(self):
+    def publish(self, dest):
+        """Deploy the puzzle to the given directory, and return the info needed for describing
+        the puzzle and accepting answers in MOTH."""
+
+        if not os.path.exists(dest):
+            raise ValueError("Puzzle destination directory does not exist.")
+
+        # Delete the original directory
+
+        # Save puzzle html file
+
+        # Copy over all the files.
+
         obj = {
-            'author': self.fields['author'],
-            'hashes': self.hashes,
+            'author': self['author'],
+            'hashes': self['hashes'],
             'body': self.htmlify(),
         }
         return obj
 
     def secrets(self):
         obj = {
-            'answers': self.answers,
-            'summary': self.fields['summary'],
+            'answers': self['answers'],
+            'summary': self['summary'],
         }
         return obj
     
@@ -78,7 +240,7 @@ if __name__ == '__main__':
             filename = os.path.basename(puzzlePath)
             points, ext = os.path.splitext(filename)
             points = int(points)
-            puzzle = Puzzle(open(puzzlePath))
+            puzzle = Puzzle(puzzlePath, "test")
             puzzles[points] = puzzle
 
         for points in sorted(puzzles):