Redesign database and implement voting
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parent
a0b65c7d5b
commit
80e9bc1bde
16 changed files with 376 additions and 41 deletions
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@ -1,10 +1,11 @@
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CREATE TABLE states (
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state varchar UNIQUE NOT NULL,
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active bool NOT NULL DEFAULT TRUE, -- Whether request can be considered "active"
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PRIMARY KEY(state)
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);
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INSERT INTO states (state) VALUES
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('Requested'),
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('Rejected'),
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('Accepted'),
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('Learned');
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INSERT INTO states (state,active) VALUES
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('Requested',TRUE),
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('Rejected',FALSE),
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('Accepted',TRUE),
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('Learned',FALSE);
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10
db/05-config.sql
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10
db/05-config.sql
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CREATE TABLE config (
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rowlock bool DEFAULT TRUE UNIQUE NOT NULL CHECK (rowlock = TRUE),
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normaluservotepoints int NOT NULL,
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followervotepoints int NOT NULL,
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subscribervotepoints int NOT NULL,
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PRIMARY KEY (rowLock)
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);
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INSERT INTO config (normalUserVotePoints,followerVotePoints,subscriberVotePoints)
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VALUES (10,50,100);
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@ -1,9 +0,0 @@
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CREATE TABLE requests (
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id int GENERATED ALWAYS AS IDENTITY,
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url varchar UNIQUE,
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requester varchar NOT NULL,
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score int DEFAULT 0,
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state varchar NOT NULL DEFAULT 'Requested',
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PRIMARY KEY(id),
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FOREIGN KEY (state) REFERENCES states(state)
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);
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8
db/10-users.sql
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8
db/10-users.sql
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@ -0,0 +1,8 @@
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CREATE TABLE users (
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userId int NOT NULL,
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displayName varchar NOT NULL,
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imageUrl varchar,
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isFollower boolean NOT NULL DEFAULT FALSE,
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isSubscriber boolean NOT NULL DEFAULT FALSE,
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PRIMARY KEY (userId)
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);
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9
db/20-requests.sql
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9
db/20-requests.sql
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@ -0,0 +1,9 @@
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CREATE TABLE requests (
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url varchar NOT NULL UNIQUE,
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requester int NOT NULL,
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state varchar NOT NULL DEFAULT 'Requested',
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reqTimestamp timestamptz NOT NULL DEFAULT NOW(),
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PRIMARY KEY (url),
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FOREIGN KEY (requester) REFERENCES users(userid),
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FOREIGN KEY (state) REFERENCES states(state)
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);
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7
db/30-votes.sql
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7
db/30-votes.sql
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CREATE TABLE votes (
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requestUrl varchar,
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userId int,
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PRIMARY KEY (requestUrl,userId),
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FOREIGN KEY (requestUrl) REFERENCES requests(url),
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FOREIGN KEY (userId) REFERENCES users(userId)
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);
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7
db/40-scores.sql
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7
db/40-scores.sql
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@ -0,0 +1,7 @@
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CREATE TABLE scores (
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url varchar,
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baseScore int NOT NULL DEFAULT 0,
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score int NOT NULL DEFAULT 0,
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PRIMARY KEY (url),
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FOREIGN KEY (url) REFERENCES requests(url)
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);
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114
db/90-views.sql
114
db/90-views.sql
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@ -1,5 +1,111 @@
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CREATE VIEW requests_vw AS
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SELECT * FROM requests WHERE state = 'Requested' ORDER BY score DESC, id ASC;
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CREATE OR REPLACE FUNCTION get_requests()
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RETURNS TABLE (
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url varchar,
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requester varchar,
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state varchar,
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score int,
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reqTimestamp timestamptz
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)
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LANGUAGE SQL
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AS $$
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SELECT url,displayName AS requester,state,score,reqTimestamp FROM requests
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JOIN scores USING (url)
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JOIN users ON requests.requester = users.userid
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WHERE state IN (SELECT state FROM states WHERE active)
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ORDER BY score DESC, reqTimestamp ASC;
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$$;
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CREATE VIEW requests_all_vw AS
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SELECT * FROM requests ORDER BY score DESC, id ASC;
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CREATE OR REPLACE FUNCTION get_requests_all()
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RETURNS TABLE (
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url varchar,
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requester varchar,
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state varchar,
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score int,
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reqTimestamp timestamptz
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)
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LANGUAGE SQL
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AS $$
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SELECT url,displayName AS requester,state,score,reqTimestamp FROM requests
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JOIN scores USING (url)
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JOIN users ON requests.requester = users.userid
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ORDER BY score DESC, reqTimestamp ASC;
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$$;
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CREATE OR REPLACE FUNCTION get_requests_voted(votinguserid int)
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RETURNS TABLE (
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url varchar,
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requester varchar,
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state varchar,
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score int,
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reqTimestamp timestamptz,
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voted bool
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)
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LANGUAGE SQL
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AS $$
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SELECT url,displayName AS requester,state,score,reqTimestamp,
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(CASE WHEN votes.userid IS NULL THEN FALSE ELSE TRUE END) AS voted
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FROM requests
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JOIN scores USING (url)
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JOIN users ON requests.requester = users.userid
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LEFT JOIN votes ON (requests.url = votes.requesturl AND votes.userid = votinguserid)
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WHERE state IN (SELECT state FROM states WHERE active)
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ORDER BY score DESC, reqTimestamp ASC;
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$$;
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CREATE OR REPLACE FUNCTION get_requests_all_voted(votinguserid int)
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RETURNS TABLE (
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url varchar,
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requester varchar,
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state varchar,
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score int,
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reqTimestamp timestamptz,
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voted bool
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)
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LANGUAGE SQL
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AS $$
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SELECT url,displayName AS requester,state,score,reqTimestamp,
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(CASE WHEN votes.userid IS NULL THEN FALSE ELSE TRUE END) AS voted
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FROM requests
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JOIN scores USING (url)
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JOIN users ON requests.requester = users.userid
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LEFT JOIN votes ON (requests.url = votes.requesturl AND votes.userid = votinguserid)
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ORDER BY score DESC, reqTimestamp ASC;
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$$;
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/*
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Views to determine the score added by votes from different classes of users.
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In order for songs with no votes to show up in this view (and thus have their
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scores properly calculated), the query must be JOINed to requests, the URL must
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be selected as requests.url rather than votes.requesturl (which is null in the
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case of no votes), and users.is{follower,subscriber} must be COALESCEd to FALSE
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as in the case of no votes, user.* will be NULL.
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*/
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CREATE OR REPLACE VIEW vote_score_normal_vw AS
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SELECT requests.url,COUNT(votes.requesturl),(COUNT(votes.requesturl) * (SELECT normaluservotepoints FROM config)) AS votescore FROM requests
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LEFT JOIN votes ON votes.requesturl = requests.url
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LEFT JOIN users on votes.userid = users.userid
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WHERE COALESCE(users.isfollower,FALSE) = FALSE AND COALESCE(users.issubscriber,FALSE) = FALSE
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GROUP BY requests.url;
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CREATE OR REPLACE VIEW vote_score_follower_vw AS
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SELECT requests.url,COUNT(votes.requesturl),(COUNT(votes.requesturl) * (SELECT followervotepoints FROM config)) AS votescore FROM requests
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LEFT JOIN votes ON votes.requesturl = requests.url
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LEFT JOIN users on votes.userid = users.userid
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WHERE COALESCE(users.isfollower,FALSE) = TRUE AND COALESCE(users.issubscriber,FALSE) = FALSE
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GROUP BY requests.url;
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CREATE OR REPLACE VIEW vote_score_subscriber_vw AS
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SELECT requests.url,COUNT(votes.requesturl),(COUNT(votes.requesturl) * (SELECT subscribervotepoints FROM config)) AS votescore FROM requests
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LEFT JOIN votes ON votes.requesturl = requests.url
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LEFT JOIN users on votes.userid = users.userid
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WHERE COALESCE(users.issubscriber,FALSE) = TRUE
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GROUP BY requests.url;
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CREATE OR REPLACE VIEW vote_score_all_vw AS
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SELECT url,SUM(count) AS count, SUM(votescore) AS votescore FROM
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(SELECT * FROM vote_score_normal_vw
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UNION ALL SELECT * FROM vote_score_follower_vw
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UNION ALL SELECT * FROM vote_score_subscriber_vw
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) AS union_vote_score
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GROUP BY url;
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30
db/95-procedures.sql
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30
db/95-procedures.sql
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@ -0,0 +1,30 @@
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CREATE OR REPLACE PROCEDURE update_scores()
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LANGUAGE SQL
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AS $$
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UPDATE scores SET score = basescore + votescore
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FROM vote_score_all_vw
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WHERE scores.url = vote_score_all_vw.url;
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$$;
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CREATE OR REPLACE PROCEDURE add_request(url varchar,requester int)
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LANGUAGE SQL
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AS $$
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INSERT INTO requests (url,requester) VALUES (url,requester);
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INSERT INTO scores (url) VALUES (url);
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INSERT INTO votes (requesturl,userid) VALUES (url,requester);
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CALL update_scores();
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$$;
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CREATE OR REPLACE PROCEDURE add_vote(url varchar,voteuser int)
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LANGUAGE SQL
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AS $$
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INSERT INTO votes (requesturl,userid) VALUES (url,voteuser);
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CALL update_scores();
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$$;
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CREATE OR REPLACE PROCEDURE delete_vote(url varchar,voteuser int)
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LANGUAGE SQL
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AS $$
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DELETE FROM votes WHERE requesturl = url AND userid = voteuser;
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CALL update_scores();
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$$;
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@ -1,5 +1,22 @@
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INSERT INTO requests (url,requester,score,state) VALUES
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('https://www.youtube.com/watch?v=dQw4w9WgXcQ','virtualdxs',0,'Rejected'),
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('https://www.youtube.com/watch?v=C5oeWHngDS4','virtualdxs',500,'Requested'),
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('https://www.youtube.com/watch?v=vXaJGBLRA_o','virtualdxs',0,'Requested');
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INSERT INTO users (userId,displayName,isFollower,isSubscriber) VALUES
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(001,'user',false,false),
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(002,'follower',true,false),
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(003,'subscriber',true,true),
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(004,'subnonfollower',false,true);
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/* INSERT INTO requests (url,requester,state) VALUES
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('https://www.youtube.com/watch?v=dQw4w9WgXcQ',001,'Rejected'),
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('https://www.youtube.com/watch?v=C5oeWHngDS4',002,'Requested'),
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('https://www.youtube.com/watch?v=vXaJGBLRA_o',003,'Requested'); */
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CALL add_request('https://www.youtube.com/watch?v=dQw4w9WgXcQ',001);
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CALL add_request('https://www.youtube.com/watch?v=C5oeWHngDS4',002);
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CALL add_request('https://www.youtube.com/watch?v=vXaJGBLRA_o',003);
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UPDATE requests SET state = 'Rejected' WHERE url = 'https://www.youtube.com/watch?v=dQw4w9WgXcQ';
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INSERT INTO votes (requestUrl,userid) VALUES
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('https://www.youtube.com/watch?v=C5oeWHngDS4',001),
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('https://www.youtube.com/watch?v=C5oeWHngDS4',003);
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CALL update_scores();
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