Let's collect more data.

assets/main.db.sql

@@ -1,5 +1,51 @@
 BEGIN TRANSACTION;
 
+---   CREATE TABLE `word` (
+---     `id`	INTEGER PRIMARY KEY AUTOINCREMENT,
+---     `word`	TEXT UNIQUE
+---   );
+---   CREATE TABLE sqlite_sequence(name,seq);
+---   CREATE TABLE `user` (
+---     `id`	INTEGER NOT NULL UNIQUE,
+---     `username`	TEXT NOT NULL,
+---     `first_name`	TEXT NOT NULL,
+---     `last_name`	TEXT NOT NULL,
+---     `date`	INTEGER NOT NULL,
+---     PRIMARY KEY(`id`)
+---   );
+---   CREATE TABLE `conf` (
+---     `id`	NUMERIC NOT NULL UNIQUE,
+---     `title`	TEXT,
+---     `date`	INTEGER NOT NULL,
+---     PRIMARY KEY(`id`)
+---   );
+---   CREATE TABLE `xxx_message` (`id` INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, `text`	TEXT UNIQUE NULL);
+---   CREATE TABLE IF NOT EXISTS "relations" (
+---     `id`	INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
+---     `word_id`	INTEGER NOT NULL,
+---     `user_id`	INTEGER NOT NULL,
+---     `conf_id`	INTEGER NOT NULL,
+---     `msg_id`  INTEGER NOT NULL,
+---     `date`	INTEGER NOT NULL,
+---     FOREIGN KEY(`word_id`) REFERENCES `word`(`id`) ON DELETE CASCADE,
+---     FOREIGN KEY(`user_id`) REFERENCES `user`(`id`),
+---     FOREIGN KEY(`conf_id`) REFERENCES `conf`(`id`)
+---   );
+---   CREATE TABLE `reset` (
+---     `id`	INTEGER PRIMARY KEY AUTOINCREMENT,
+---     `user_id`	INTEGER,
+---     `conf_id`	INTEGER,
+---     `date`	INTEGER,
+---     `relation_id`	INTEGER,
+---     FOREIGN KEY(`user_id`) REFERENCES `user`(`id`)
+---   );
+---   CREATE TABLE `alert` (
+---   `conf_id`TEXT NOT NULL,
+---   `user_id`TEXT NOT NULL,
+---   `created`TEXT NOT NULL,
+---   `time`TEXT NOT NULL,
+---   `message`TEXT
+---   );
 CREATE TABLE `word` (
 	`id`	INTEGER PRIMARY KEY AUTOINCREMENT,
 	`word`	TEXT UNIQUE
@@ -24,7 +70,7 @@ CREATE TABLE IF NOT EXISTS "relations" (
 	`word_id`	INTEGER NOT NULL,
 	`user_id`	INTEGER NOT NULL,
 	`conf_id`	INTEGER NOT NULL,
-	`date`	INTEGER NOT NULL,
+	`date`	INTEGER NOT NULL, `msg_id` INTEGER NULL,
 	FOREIGN KEY(`word_id`) REFERENCES `word`(`id`) ON DELETE CASCADE,
 	FOREIGN KEY(`user_id`) REFERENCES `user`(`id`),
 	FOREIGN KEY(`conf_id`) REFERENCES `conf`(`id`)
@@ -44,4 +90,5 @@ CREATE TABLE `alert` (
 `time`TEXT NOT NULL,
 `message`TEXT
 );
+CREATE TABLE `xxx_message` (`id` INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, `text`TEXT UNIQUE NULL);
 COMMIT;

database.py

@@ -89,15 +89,20 @@ class DataBase:
         )
         self.execute(sql)
 
-    def add_relation(self, word, user_id, conf_id):
+    def add_relation(self, word, user_id, conf_id, text):
         word_id = self.save_word(word)
         date = int(dt.datetime.now().strftime("%s"))
+        sql2 = "INSERT OR IGNORE INTO xxx_message('text') VALUES ('%s')" % text
+        self.execute(sql2)
+        sql3 = "SELECT id FROM `xxx_message` WHERE text = '%s'" % text
+        msg_id = self.execute(sql3)[0][0]
         sql = """INSERT OR IGNORE INTO 
-        relations('word_id', 'user_id', 'conf_id', 'date') 
+        relations('word_id', 'user_id', 'conf_id', 'msg_id', 'date') 
-        VALUES ('%s','%s','%s','%s')""" % (
+        VALUES ('%s','%s','%s','%s', '%s')""" % (
             word_id,
             user_id,
             conf_id,
+            msg_id,
             date
         )
         self.execute(sql)

worker.py

@@ -248,7 +248,7 @@ class MessageWorker:
         self.db.add_conf(chat_id, chat_title)
 
         for word in collection:
-            self.db.add_relation(word=word, user_id=user_id, conf_id=chat_id)
+            self.db.add_relation(word=word, user_id=user_id, conf_id=chat_id, text=text)
 
     def clean_text(self, s):
         file = open(self.stop_words, 'rt')