feat: initial commit

cmd/migrate/migrations/000001_create_users.down.sql

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+DROP TABLE IF EXISTS users;

cmd/migrate/migrations/000001_create_users.up.sql

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+CREATE EXTENSION IF NOT EXISTS citext;
+
+CREATE TABLE IF NOT EXISTS users (
+    id bigserial PRIMARY KEY,
+    first_name VARCHAR(255) NOT NULL,
+    last_name VARCHAR(255) NOT NULL,
+    username VARCHAR(255) UNIQUE NOT NULL,
+    email citext UNIQUE NOT NULL,
+    password bytea NOT NULL,
+    created_at timestamp(0) with time zone NOT NULL DEFAULT NOW(),
+    updated_at timestamp(0) with time zone NOT NULL DEFAULT NOW()
+);
+
+

cmd/migrate/migrations/000002_posts_create.down.sql

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+DROP TABLE IF EXISTS posts;

cmd/migrate/migrations/000002_posts_create.up.sql

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+CREATE TABLE IF NOT EXISTS posts (
+    id bigserial PRIMARY KEY,
+    title VARCHAR(255) NOT NULL,
+    content TEXT NOT NULL,
+    user_id bigint NOT NULL,
+    created_at timestamp(0) with time zone NOT NULL DEFAULT NOW(),
+    updated_at timestamp(0) with time zone NOT NULL DEFAULT NOW(),
+    FOREIGN KEY (user_id) REFERENCES users (id) ON DELETE CASCADE
+);

cmd/migrate/migrations/000003_update_posts_with_tags.down.sql

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+ALTER TABLE posts
+    DROP COLUMN tags;

cmd/migrate/migrations/000003_update_posts_with_tags.up.sql

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+ALTER TABLE posts
+    ADD COLUMN tags VARCHAR(100)[] NOT NULL DEFAULT '{}';

cmd/migrate/migrations/000004_add_comments.down.sql

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+DROP TABLE IF EXISTS Comments;

cmd/migrate/migrations/000004_add_comments.up.sql

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+CREATE TABLE IF NOT EXISTS Comments (
+    id  bigserial PRIMARY KEY,
+    post_id bigserial NOT NULL,
+    user_id bigserial NOT NULL,
+    content TEXT NOT NULL,
+    created_at timestamp(0) with time zone NOT NULL DEFAULT NOW(),
+    updated_at timestamp(0) with time zone NOT NULL DEFAULT NOW(),
+    FOREIGN KEY (post_id) REFERENCES Posts(id),
+    FOREIGN KEY (user_id) REFERENCES Users(id)
+);

cmd/migrate/migrations/000005_add_version_posts.down.sql

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+ALTER TABLE posts DROP COLUMN version;

cmd/migrate/migrations/000005_add_version_posts.up.sql

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+ALTER TABLE posts ADD COLUMN version INT NOT NULL DEFAULT 0;

cmd/migrate/migrations/000006_add_followers_table.down.sql

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+DROP TABLE IF EXISTS followers;

cmd/migrate/migrations/000006_add_followers_table.up.sql

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+CREATE TABLE IF NOT EXISTS followers (
+    user_id bigint NOT NULL,
+    follower_id bigint NOT NULL,
+    created_at timestamp(0) with time zone NOT NULL DEFAULT NOW(),
+
+    PRIMARY KEY (user_id, follower_id),
+    FOREIGN KEY (user_id) REFERENCES users (id),
+    FOREIGN KEY (follower_id) REFERENCES users (id)
+);

cmd/migrate/migrations/000007_add_indexes.down.sql

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+DROP INDEX IF EXISTS idx_comments_content;
+DROP INDEX IF EXISTS idx_comments_post_id;
+
+DROP INDEX IF EXISTS idx_posts_title;
+DROP INDEX IF EXISTS idx_posts_tags;
+DROP INDEX IF EXISTS idx_posts_user_id;
+
+DROP INDEX IF EXISTS idx_users_username;

cmd/migrate/migrations/000007_add_indexes.up.sql

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+-- Indexes are used to speed up the query process. They are used to quickly locate the rows in a table that match the search condition.
+
+CREATE EXTENSION IF NOT EXISTS pg_trgm;
+
+CREATE INDEX idx_comments_content ON comments USING gin (content gin_trgm_ops);
+
+CREATE INDEX IF NOT EXISTS idx_posts_title ON posts USING gin (title gin_trgm_ops);
+
+CREATE INDEX IF NOT EXISTS idx_posts_tags ON posts USING gin (tags);
+
+
+CREATE INDEX IF NOT EXISTS idx_users_username ON users (username);
+
+CREATE INDEX IF NOT EXISTS idx_posts_user_id ON posts (user_id);
+
+CREATE INDEX IF NOT EXISTS idx_comments_post_id ON comments (post_id);
+
+
+

cmd/migrate/migrations/000008_add_invitation.down.sql

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+DROP TABLE IF EXISTS invitations;

cmd/migrate/migrations/000008_add_invitation.up.sql

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+CREATE TABLE IF NOT EXISTS invitations (
+    token bytea PRIMARY KEY,
+    user_id bigint NOT NULL
+);
+

cmd/migrate/migrations/000009_add_active_users.down.sql

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+ALTER TABLE 
+    users
+DROP COLUMN
+    is_active;

cmd/migrate/migrations/000009_add_active_users.up.sql

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+ALTER TABLE 
+    users
+ADD COLUMN
+    is_active boolean NOT NULL DEFAULT false;

cmd/migrate/migrations/000010_add_expiry_to_invitation.down.sql

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+ALTER TABLE
+    invitations DROP COLUMN expiry;

cmd/migrate/migrations/000010_add_expiry_to_invitation.up.sql

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+ALTER TABLE
+    invitations
+ADD COLUMN
+    expiry TIMESTAMP(0) WITH TIME ZONE NOT NULL;

cmd/migrate/migrations/000011_add_roles_table.down.sql

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+DROP TABLE IF EXISTS roles;

cmd/migrate/migrations/000011_add_roles_table.up.sql

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+CREATE TABLE IF NOT EXISTS roles (
+    id BIGSERIAL PRIMARY KEY,
+    name VARCHAR(255) NOT NULL UNIQUE,
+    level INT NOT NULL DEFAULT 1,
+    description TEXT
+);
+
+INSERT INTO 
+    roles (name, level, description)
+VALUES (
+'user',
+1,
+'User'
+);
+
+INSERT INTO 
+    roles (name, level, description)
+VALUES (
+'moderator',
+2,
+'Moderator'
+);
+
+INSERT INTO 
+    roles (name, level, description) 
+VALUES (
+'admin', 
+3, 
+'Administrator'
+);

cmd/migrate/migrations/000012_alter_users_with_roles.down.sql

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+ALTER TABLE 
+IF EXISTS users DROP COLUMN  role_id;

cmd/migrate/migrations/000012_alter_users_with_roles.up.sql

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+ALTER TABLE 
+    IF EXISTS users
+ADD 
+    COLUMN role_id INT REFERENCES roles(id) DEFAULT 1;
+
+UPDATE 
+    users
+SET
+    role_id = (
+        SELECT 
+            id 
+        FROM 
+            roles 
+        WHERE 
+            name = 'user'
+    )
+WHERE
+    role_id IS NULL;
+
+ALTER TABLE 
+    users
+ALTER COLUMN 
+    role_id DROP DEFAULT;
+
+ALTER TABLE users
+ALTER COLUMN role_id 
+SET NOT NULL;