Created new chat table in scheme.sql, Added chat.py with 3 methods (incomplete)

web_server/database/schema.sql

@@ -1,12 +1,13 @@
 DROP TABLE IF EXISTS users;
 CREATE TABLE users
 (
-    username VARCHAR(50) PRIMARY KEY NOT NULL,
+    username VARCHAR(50) NOT NULL,
     password VARCHAR(256) NOT NULL,
     email VARCHAR(64) NOT NULL,
     num_followers INTEGER NOT NULL,
     isPartenered BOOLEAN NOT NULL DEFAULT 0,
-    bio TEXT
+    bio TEXT,
+    PRIMARY KEY (username)
 );
 
 SELECT * FROM users;
@@ -15,22 +16,36 @@ SELECT * FROM users;
 DROP TABLE IF EXISTS streams;
 CREATE TABLE streams
 (
-    stream_id INTEGER PRIMARY KEY AUTOINCREMENT,
+    stream_id INTEGER AUTOINCREMENT,
     title TEXT NOT NULL,
     start_time DATETIME NOT NULL,
     num_viewers INT NOT NULL DEFAULT 0,
     isLive BOOLEAN NOT NULL DEFAULT 0,
     vod_id INT,
     streamer_id VARCHAR NOT NULL,
+    PRIMARY KEY (stream_id),
     FOREIGN KEY (streamer_id) REFERENCES users(username) ON DELETE CASCADE
 );
 
 DROP TABLE IF EXISTS follows;
 CREATE TABLE follows
 (
-    user_id INT NOT NULL,
-    following_id INT NOT NULL,
-    PRIMARY KEY (user_id, following_id),
-    FOREIGN KEY (user_id) REFERENCES users(username) ON DELETE CASCADE,
+    username VARCHAR(50) NOT NULL,
+    following_id VARCHAR(50) NOT NULL,
+    PRIMARY KEY (username, following_id),
+    FOREIGN KEY (username) REFERENCES users(username) ON DELETE CASCADE,
     FOREIGN KEY (following_id) REFERENCES users(username) ON DELETE CASCADE
+);
+
+DROP TABLE IF EXISTS chat;
+CREATE TABLE chat
+(
+    message_id INT AUTOINCREMENT,
+    chatter_id VARCHAR(50) NOT NULL,
+    stream_id INT NOT NULL,
+    message TEXT NOT NULL,
+    time_sent DATETIME NOT NULL,
+    PRIMARY KEY (message_id),
+    FOREIGN KEY (chatter_id) REFERENCES users(username),
+    FOREIGN KEY (stream_id) REFERENCES streams(stream_id) ON DELETE CASCADE
 );