optimized schema

backend/db/initScripts/_createSchema.sql

@@ -1,5 +1,16 @@
 CREATE TABLE "user" (
-    username VARCHAR(32) PRIMARY KEY
+    id SERIAL PRIMARY KEY,
+    name VARCHAR(32)
+);
+
+CREATE TABLE user_scores (
+    user_id INT PRIMARY KEY REFERENCES "user",
+    highscore INT NOT NULL DEFAULT 0,
+    total_score INT NOT NULL DEFAULT 0,
+    total_playtime TIME NOT NULL DEFAULT '00:00:00',
+    average_score INT NOT NULL DEFAULT 0,
+    games_played INT NOT NULL DEFAULT 0,
+    FOREIGN KEY (user_id) REFERENCES "user"
 );
 
 CREATE TABLE game (
@@ -7,26 +18,64 @@ CREATE TABLE game (
     score INTEGER NOT NULL,
     playtime TIME NOT NULL,
     date DATE NOT NULL,
-    username VARCHAR(32) NOT NULL,
-    FOREIGN KEY (username) REFERENCES "user"
+    user_id INT NOT NULL,
+    FOREIGN KEY (user_id) REFERENCES "user"
 );
 
-CREATE VIEW user_data AS (
+CREATE VIEW lb_highscore AS (
+    SELECT row_number() OVER (ORDER BY highscore DESC) AS rank, user_id, highscore FROM user_scores ORDER BY rank
+);
+
+CREATE VIEW lb_total_playtime AS (
+    SELECT row_number() OVER (ORDER BY total_playtime DESC) AS rank, user_id, total_playtime AS total_playtime FROM user_scores ORDER BY rank
+);
+
+CREATE OR REPLACE FUNCTION insert_new_user_scores()
+    RETURNS TRIGGER
+    LANGUAGE plpgsql AS
+$$
+    BEGIN
+        INSERT INTO user_scores (user_id) VALUES (NEW.id);
+        RETURN NEW;
+    END;
+$$;
+
+CREATE TRIGGER user_added
+    AFTER INSERT ON "user"
+    FOR EACH ROW
+EXECUTE FUNCTION insert_new_user_scores();
+
+CREATE OR REPLACE FUNCTION update_user_scores()
+    RETURNS TRIGGER
+    LANGUAGE plpgsql AS
+$$
+DECLARE
+    row user_scores%ROWTYPE;
+BEGIN
     SELECT
-        username,
+        user_id,
         max(score) AS highscore,
         sum(score) AS total_score,
         sum(playtime) AS total_playtime,
         avg(score) AS average_score,
         count(*) AS games_played
+    INTO row
     FROM game
-    GROUP BY username
-);
+    WHERE user_id = NEW.user_id
+    GROUP BY user_id;
 
-CREATE VIEW lb_highscore AS (
-    SELECT row_number() OVER (ORDER BY max(score) DESC) AS rank, username, max(score) AS highscore FROM game GROUP BY username ORDER BY rank
-);
+    UPDATE user_scores SET
+       highscore = row.highscore,
+       total_score = row.total_score,
+       total_playtime = row.total_playtime,
+       average_score = row.average_score,
+       games_played = row.games_played
+    WHERE user_id = row.user_id;
+    RETURN NEW;
+END
+$$;
 
-CREATE VIEW lb_total_playtime AS (
-    SELECT row_number() OVER (ORDER BY sum(playtime) DESC) AS rank, username, sum(playtime) AS total_playtime FROM game GROUP BY username ORDER BY rank
-);
+CREATE TRIGGER game_played
+    AFTER INSERT ON game
+    FOR EACH ROW
+EXECUTE FUNCTION update_user_scores();