Added MongoDB adapter.

.travis.yml

@@ -8,8 +8,12 @@ python:
 
 install:
   - pip install coveralls
+  - pip install pymongo
   - pip install -r requirements.txt
 
+services:
+  - mongodb
+
 script:
   - nosetests  --with-coverage --cover-package=chatterbot
 

chatterbot/adapters/storage/__init__.py

@@ -1,3 +1,4 @@
 from .database import DatabaseAdapter
 from .jsondatabase import JsonDatabaseAdapter
+from .mongodb import MongoDatabaseAdapter
 

chatterbot/adapters/storage/mongodb.py

@@ -1,58 +1,112 @@
 from chatterbot.adapters.storage import DatabaseAdapter
+from chatterbot.adapters.exceptions import EmptyDatabaseException
+from chatterbot.conversation import Statement
 from pymongo import MongoClient
 
-# Use the default host and port
-client = MongoClient()
-
-# We can also specify the host and port explicitly
-#client = MongoClient('localhost', 27017)
-
-# Specify the name of the database
-db = client['test-database']
-
-# The mongo collection of statement documents
-statements = db['statements']
-
 
 class MongoDatabaseAdapter(DatabaseAdapter):
 
     def __init__(self, **kwargs):
-        pass
+        super(MongoDatabaseAdapter, self).__init__(**kwargs)
 
-    def find(self, statement):
-    #def find(self, key):
-        return statements.find_one(statement)
+        self.database_name = self.kwargs.get("database", "chatterbot-database")
 
-    def insert(self, key, values):
-        statement_id = self.statements.insert_one(statement).inserted_id
+        # Use the default host and port
+        self.client = MongoClient()
 
-        return statement_id
+        # Specify the name of the database
+        self.database = self.client[self.database_name]
 
-    def update(self, key, **kwargs):
+        # The mongo collection of statement documents
+        self.statements = self.database['statements']
 
-        values = self.database.data(key=key)
+    def count(self):
+        return self.statements.count()
+
+    def find(self, statement_text):
+        values = self.statements.find_one({'text': statement_text})
 
-        # Create the statement if it doesn't exist in the database
         if not values:
-            self.database[key] = {}
-            values = {}
+            return None
+
+        del(values['text'])
+        return Statement(statement_text, **values)
 
+    def filter(self, **kwargs):
+        """
+        Returns a list of statements in the database
+        that match the parameters specified.
+        """
+        filter_parameters = kwargs.copy()
+        contains_parameters = {}
+
+        # Exclude special arguments from the kwargs
         for parameter in kwargs:
-            values[parameter] = kwargs.get(parameter)
+            if "__" in parameter:
+                del(filter_parameters[parameter])
+
+                kwarg_parts = parameter.split("__")
+
+                if kwarg_parts[1] == "contains":
+                    key = kwarg_parts[0]
+                    value = kwargs[parameter]
+                    contains_parameters[key] = value
+
+        filter_parameters.update(contains_parameters)
+
+        matches = self.statements.find(filter_parameters)
+        matches = list(matches)
 
-        self.database[key] = values
+        results = []
 
-        return values
+        for match in matches:
+            statement_text = match['text']
+            del(match['text'])
+            results.append(Statement(statement_text, **match))
 
-    def keys(self):
-        # The value has to be cast as a list for Python 3 compatibility
-        return list(self.database[0].keys())
+        return results
+
+    def update(self, statement):
+        # Do not alter the database unless writing is enabled
+        if not self.read_only:
+            data = statement.serialize()
+
+            # Remove the text key from the data
+            self.statements.update({'text': statement.text}, data, True)
+
+            # Make sure that an entry for each response is saved
+            for response_statement in statement.in_response_to:
+                response = self.find(response_statement)
+                if not response:
+                    response = Statement(response_statement)
+                    self.update(response)
+
+        return statement
 
     def get_random(self):
         """
         Returns a random statement from the database
         """
-        from random import choice
+        from random import randint
+
+        count = self.count()
+
+        random_integer = randint(0, count -1)
+
+        if self.count() < 1:
+            raise EmptyDatabaseException()
+
+        statement = self.statements.find().limit(1).skip(random_integer * count)
+
+        values = list(statement)[0]
+        statement_text = values['text']
+
+        del(values['text'])
+        return Statement(statement_text, **values)
+
+    def drop(self):
+        """
+        Remove the database.
+        """
+        self.client.drop_database(self.database_name)
 
-        statement = choice(self.keys())
-        return {statement: self.find(statement)}

chatterbot/chatterbot.py

@@ -85,12 +85,10 @@ def get_response(self, input_text):
         """
         Return the bot's response based on the input.
         """
-        text_of_all_statements = self.storage._keys()
-
         input_statement = Statement(input_text)
 
         # If no responses exist, use the input text
-        if not text_of_all_statements:
+        if not self.storage.count():
             response = Statement(input_text)
             self.storage.update(response)
             self.recent_statements.append(response)
@@ -100,6 +98,11 @@ def get_response(self, input_text):
 
             return response
 
+        all_statements = self.storage.filter()
+        text_of_all_statements = []
+        for statement in all_statements:
+            text_of_all_statements.append(statement.text)
+
         # Select the closest match to the input statement
         closest_match = self.logic.get(
             input_text, text_of_all_statements

examples/terminal_mongo_example.py

@@ -0,0 +1,40 @@
+from chatterbot import ChatBot
+
+
+# Create a new instance of a ChatBot
+bot = ChatBot("Terminal",
+    storage_adapter="chatterbot.adapters.storage.MongoDatabaseAdapter",
+    logic_adapter="chatterbot.adapters.logic.ClosestMatchAdapter",
+    io_adapter="chatterbot.adapters.io.TerminalAdapter",
+    database="chatterbot-database")
+
+user_input = "Type something to begin..."
+
+print(user_input)
+
+'''
+In this example we use a while loop combined with a try-except statement.
+This allows us to have a conversation with the chat bot until we press
+ctrl-c or ctrl-d on the keyboard.
+'''
+
+while True:
+    try:
+        '''
+        ChatterBot's get_input method uses io adapter to get new input for
+        the bot to respond to. In this example, the TerminalAdapter gets the
+        input from the user's terminal. Other io adapters might retrieve input
+        differently, such as from various web APIs.
+        '''
+        user_input = bot.get_input()
+
+        '''
+        The get_response method also uses the io adapter to determine how
+        the bot's output should be returned. In the case of the TerminalAdapter,
+        the output is printed to the user's terminal.
+        '''
+        bot_input = bot.get_response(user_input)
+
+    except (KeyboardInterrupt, EOFError, SystemExit):
+        break
+

requirements.txt

@@ -1,4 +1,5 @@
 fuzzywuzzy==0.6.0
+jsondatabase>=0.0.6
+pymongo==3.0.3
 requests==2.7.0
 requests-oauthlib==0.5.0
-jsondatabase==0.0.6

tests/storage_adapter_tests/test_jsondb_adapter.py

@@ -241,6 +241,20 @@ def test_filter_multiple_parameters_no_results(self):
 
         self.assertEqual(len(results), 0)
 
+    def test_filter_no_parameters(self):
+        """
+        If not parameters are provided to the filter,
+        then all statements should be returned.
+        """
+        statement1 = Statement("Testing...")
+        statement2 = Statement("Testing one, two, three.")
+        self.adapter.update(statement1)
+        self.adapter.update(statement2)
+
+        results = self.adapter.filter()
+
+        self.assertEqual(len(results), 2)
+
 
 class ReadOnlyJsonDatabaseAdapterTestCase(BaseJsonDatabaseAdapterTestCase):