Restructure DB in preparation for follower/subscriber implementation

- Remove user.is{follower,subscriber}, replacing with tables follows and 
subscriptions
- Update vote_score_vw to reflect new structure
- Add db upgrade script

db/10-users.sql

@@ -2,7 +2,5 @@ CREATE TABLE users (
 	userId int NOT NULL,
 	displayName varchar NOT NULL,
 	imageUrl varchar,
-	isFollower boolean NOT NULL DEFAULT FALSE,
-	isSubscriber boolean NOT NULL DEFAULT FALSE,
 	PRIMARY KEY (userId)
 );

db/50-follows.sql

@@ -0,0 +1,4 @@
+CREATE TABLE follows (
+	userid integer,
+	PRIMARY KEY (userid)
+)

db/50-subscriptions.sql

@@ -0,0 +1,4 @@
+CREATE TABLE subscriptions (
+	userid integer,
+	PRIMARY KEY (userid)
+)

db/90-views.sql

@@ -40,11 +40,11 @@ CREATE OR REPLACE VIEW vote_score_vw AS
 		COUNT(votes.requesturl) AS count,
 		COALESCE(
 			SUM(CASE
-				WHEN users.isfollower = FALSE AND users.issubscriber = FALSE
+				WHEN follows.userid IS NULL AND subscriptions.userid IS NULL
 				THEN votepoints.normaluservotepoints
-				WHEN users.isfollower = TRUE AND users.issubscriber = FALSE
+				WHEN follows.userid IS NOT NULL AND subscriptions.userid IS NULL
 				THEN votepoints.followervotepoints
-				WHEN users.issubscriber = TRUE
+				WHEN subscriptions.userid IS NOT NULL
 				THEN votepoints.subscribervotepoints
 			END), 0
 		) AS votescore
@@ -52,6 +52,8 @@ CREATE OR REPLACE VIEW vote_score_vw AS
 		LEFT JOIN votes ON votes.requesturl = requests.url
 		LEFT JOIN users on votes.userid = users.userid
 		LEFT JOIN bans ON users.userid = bans.userid
+		LEFT JOIN follows ON users.userid = follows.userid
+		LEFT JOIN subscriptions ON users.userid = subscriptions.userid
 		CROSS JOIN votepoints
 		WHERE bans.userid IS NULL
 		GROUP BY url;

db/testdata.sql

@@ -1,8 +1,16 @@
-INSERT INTO users (userid,displayName,isFollower,isSubscriber) VALUES
+INSERT INTO users (userid,displayName) VALUES
-	(001,'TestUser',false,false),
+	(001,'TestUser'),
-	(002,'TestFollower',true,false),
+	(002,'TestFollower'),
-	(003,'TestSubscriber',true,true),
+	(003,'TestSubscriber'),
-	(004,'TestSubNonFollower',false,true);
+	(004,'TestSubNonFollower');
+
+INSERT INTO follows (userid) VALUES
+	(002),
+	(003);
+
+INSERT INTO subscriptions (userid) VALUES
+	(003),
+	(004);
 
 CALL add_request('https://www.youtube.com/watch?v=dQw4w9WgXcQ',001);
 CALL add_request('https://www.youtube.com/watch?v=C5oeWHngDS4',002);

db/upgrade/v0.4-0.5.sql

@@ -0,0 +1,49 @@
+BEGIN;
+
+--UPDATE version SET minor = 5;
+
+CREATE OR REPLACE PROCEDURE update_vote_points(normaluser int, follower int, subscriber int)
+	LANGUAGE SQL
+	AS $$
+		UPDATE config SET normaluservotepoints = normaluser,
+			followervotepoints = follower, subscribervotepoints = subscriber;
+		CALL update_scores();
+	$$;
+
+CREATE TABLE follows (
+	userid integer,
+	PRIMARY KEY (userid)
+);
+
+CREATE TABLE subscriptions (
+	userid integer,
+	PRIMARY KEY (userid)
+);
+
+CREATE OR REPLACE VIEW vote_score_vw AS
+	WITH votepoints AS (SELECT normaluservotepoints, followervotepoints, subscribervotepoints FROM config)
+	SELECT requests.url AS url,
+		COUNT(votes.requesturl) AS count,
+		COALESCE(
+			SUM(CASE
+				WHEN follows.userid IS NULL AND subscriptions.userid IS NULL
+				THEN votepoints.normaluservotepoints
+				WHEN follows.userid IS NOT NULL AND subscriptions.userid IS NULL
+				THEN votepoints.followervotepoints
+				WHEN subscriptions.userid IS NOT NULL
+				THEN votepoints.subscribervotepoints
+			END), 0
+		) AS votescore
+		FROM requests
+		LEFT JOIN votes ON votes.requesturl = requests.url
+		LEFT JOIN users on votes.userid = users.userid
+		LEFT JOIN bans ON users.userid = bans.userid
+		LEFT JOIN follows ON users.userid = follows.userid
+		LEFT JOIN subscriptions ON users.userid = subscriptions.userid
+		CROSS JOIN votepoints
+		WHERE bans.userid IS NULL
+		GROUP BY url;
+
+ALTER TABLE users DROP COLUMN isfollower, DROP COLUMN issubscriber;
+
+COMMIT;