226 lines
8.1 KiB
SQL
226 lines
8.1 KiB
SQL
-- ============================================
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-- ARCHIVAL AUDIO SOCIAL MEDIA APP - DATABASE SCHEMA
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-- ============================================
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-- Users Table
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CREATE TABLE users (
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user_id INT PRIMARY KEY AUTO_INCREMENT,
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username VARCHAR(50) UNIQUE NOT NULL,
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email VARCHAR(100) UNIQUE NOT NULL,
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password_hash VARCHAR(255) NOT NULL,
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display_name VARCHAR(100),
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profile_image_url VARCHAR(255),
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bio TEXT,
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created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
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updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
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is_active BOOLEAN DEFAULT TRUE,
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INDEX idx_username (username),
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INDEX idx_email (email)
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);
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-- Categories Table
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CREATE TABLE categories (
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category_id INT PRIMARY KEY AUTO_INCREMENT,
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name VARCHAR(100) NOT NULL,
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description TEXT,
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parent_category_id INT NULL, -- For subcategories
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created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
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FOREIGN KEY (parent_category_id) REFERENCES categories(category_id) ON DELETE SET NULL,
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INDEX idx_name (name)
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);
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-- Posts Table
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CREATE TABLE posts (
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post_id INT PRIMARY KEY AUTO_INCREMENT,
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user_id INT NOT NULL,
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title VARCHAR(255),
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transcribed_text TEXT, -- Text generated from audio
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audio_url VARCHAR(255) NOT NULL, -- URL to stored audio file
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audio_duration_seconds INT, -- Duration in seconds
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image_url VARCHAR(255), -- Optional image
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is_private BOOLEAN DEFAULT FALSE, -- TRUE = private, FALSE = public
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created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
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updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
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FOREIGN KEY (user_id) REFERENCES users(user_id) ON DELETE CASCADE,
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INDEX idx_user_id (user_id),
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INDEX idx_created_at (created_at),
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INDEX idx_is_private (is_private),
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FULLTEXT idx_fulltext_search (title, transcribed_text)
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);
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-- Post Categories (Many-to-Many relationship)
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CREATE TABLE post_categories (
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post_id INT NOT NULL,
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category_id INT NOT NULL,
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PRIMARY KEY (post_id, category_id),
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FOREIGN KEY (post_id) REFERENCES posts(post_id) ON DELETE CASCADE,
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FOREIGN KEY (category_id) REFERENCES categories(category_id) ON DELETE CASCADE,
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INDEX idx_category_id (category_id)
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);
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-- User Category Follows (for feed recommendations)
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CREATE TABLE user_category_follows (
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user_id INT NOT NULL,
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category_id INT NOT NULL,
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followed_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
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PRIMARY KEY (user_id, category_id),
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FOREIGN KEY (user_id) REFERENCES users(user_id) ON DELETE CASCADE,
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FOREIGN KEY (category_id) REFERENCES categories(category_id) ON DELETE CASCADE,
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INDEX idx_user_id (user_id),
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INDEX idx_category_id (category_id)
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);
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-- User Follows (following other users)
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CREATE TABLE user_follows (
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follower_id INT NOT NULL,
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following_id INT NOT NULL,
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followed_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
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PRIMARY KEY (follower_id, following_id),
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FOREIGN KEY (follower_id) REFERENCES users(user_id) ON DELETE CASCADE,
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FOREIGN KEY (following_id) REFERENCES users(user_id) ON DELETE CASCADE,
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INDEX idx_follower_id (follower_id),
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INDEX idx_following_id (following_id)
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);
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-- Post Likes (engagement tracking)
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CREATE TABLE post_likes (
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user_id INT NOT NULL,
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post_id INT NOT NULL,
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liked_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
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PRIMARY KEY (user_id, post_id),
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FOREIGN KEY (user_id) REFERENCES users(user_id) ON DELETE CASCADE,
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FOREIGN KEY (post_id) REFERENCES posts(post_id) ON DELETE CASCADE,
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INDEX idx_post_id (post_id),
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INDEX idx_liked_at (liked_at)
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);
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-- Comments (engagement tracking)
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CREATE TABLE comments (
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comment_id INT PRIMARY KEY AUTO_INCREMENT,
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post_id INT NOT NULL,
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user_id INT NOT NULL,
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comment_text TEXT NOT NULL,
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created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
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updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
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FOREIGN KEY (post_id) REFERENCES posts(post_id) ON DELETE CASCADE,
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FOREIGN KEY (user_id) REFERENCES users(user_id) ON DELETE CASCADE,
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INDEX idx_post_id (post_id),
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INDEX idx_user_id (user_id),
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INDEX idx_created_at (created_at)
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);
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-- Audio Listening History (for recommendations)
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CREATE TABLE audio_listening_history (
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history_id INT PRIMARY KEY AUTO_INCREMENT,
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user_id INT NOT NULL,
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post_id INT NOT NULL,
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listened_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
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listen_duration_seconds INT, -- How long they actually listened
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completed BOOLEAN DEFAULT FALSE, -- Did they listen to the end?
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FOREIGN KEY (user_id) REFERENCES users(user_id) ON DELETE CASCADE,
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FOREIGN KEY (post_id) REFERENCES posts(post_id) ON DELETE CASCADE,
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INDEX idx_user_id (user_id),
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INDEX idx_post_id (post_id),
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INDEX idx_listened_at (listened_at)
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);
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-- Search History (for recommendations)
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CREATE TABLE search_history (
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search_id INT PRIMARY KEY AUTO_INCREMENT,
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user_id INT NOT NULL,
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search_query VARCHAR(255) NOT NULL,
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searched_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
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FOREIGN KEY (user_id) REFERENCES users(user_id) ON DELETE CASCADE,
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INDEX idx_user_id (user_id),
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INDEX idx_searched_at (searched_at),
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INDEX idx_search_query (search_query)
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);
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-- Bookmarks/Saved Posts
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CREATE TABLE bookmarks (
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user_id INT NOT NULL,
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post_id INT NOT NULL,
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bookmarked_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
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PRIMARY KEY (user_id, post_id),
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FOREIGN KEY (user_id) REFERENCES users(user_id) ON DELETE CASCADE,
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FOREIGN KEY (post_id) REFERENCES posts(post_id) ON DELETE CASCADE,
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INDEX idx_user_id (user_id),
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INDEX idx_bookmarked_at (bookmarked_at)
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);
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-- ============================================
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-- SAMPLE SEED DATA
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-- ============================================
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-- Insert sample categories
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INSERT INTO categories (name, description) VALUES
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('Historical Events', 'Posts about significant historical events and eras'),
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('Cultural Traditions', 'Cultural practices, traditions, and heritage'),
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('Personal Stories', 'Individual memories and personal narratives'),
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('Oral History', 'Recorded oral histories and interviews'),
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('Family History', 'Family stories and genealogy'),
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('Local History', 'Community and local historical accounts');
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-- ============================================
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-- USEFUL QUERIES FOR THE APPLICATION
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-- ============================================
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-- Query 1: Get personalized feed for a user
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-- (Combines posts from followed users, followed categories, and engagement patterns)
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/*
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SELECT DISTINCT p.*, u.username, u.display_name
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FROM posts p
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INNER JOIN users u ON p.user_id = u.user_id
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LEFT JOIN post_categories pc ON p.post_id = pc.post_id
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LEFT JOIN user_category_follows ucf ON pc.category_id = ucf.category_id AND ucf.user_id = ?
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LEFT JOIN user_follows uf ON p.user_id = uf.following_id AND uf.follower_id = ?
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WHERE p.is_private = FALSE
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AND (ucf.user_id IS NOT NULL OR uf.follower_id IS NOT NULL OR p.user_id = ?)
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ORDER BY p.created_at DESC
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LIMIT 50;
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*/
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-- Query 2: Search posts by text (uses FULLTEXT index)
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/*
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SELECT p.*, u.username, MATCH(p.title, p.transcribed_text) AGAINST(? IN NATURAL LANGUAGE MODE) AS relevance
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FROM posts p
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INNER JOIN users u ON p.user_id = u.user_id
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WHERE MATCH(p.title, p.transcribed_text) AGAINST(? IN NATURAL LANGUAGE MODE)
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AND (p.is_private = FALSE OR p.user_id = ?)
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ORDER BY relevance DESC
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LIMIT 50;
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*/
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-- Query 3: Get user's private posts
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/*
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SELECT p.*, COUNT(DISTINCT pl.user_id) as like_count, COUNT(DISTINCT c.comment_id) as comment_count
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FROM posts p
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LEFT JOIN post_likes pl ON p.post_id = pl.post_id
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LEFT JOIN comments c ON p.post_id = c.post_id
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WHERE p.user_id = ? AND p.is_private = TRUE
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GROUP BY p.post_id
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ORDER BY p.created_at DESC;
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*/
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-- Query 4: Get posts by category
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/*
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SELECT p.*, u.username, u.display_name
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FROM posts p
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INNER JOIN users u ON p.user_id = u.user_id
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INNER JOIN post_categories pc ON p.post_id = pc.post_id
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WHERE pc.category_id = ? AND p.is_private = FALSE
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ORDER BY p.created_at DESC
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LIMIT 50;
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*/
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-- Query 5: Get user's listening history
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/*
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SELECT p.*, u.username, alh.listened_at, alh.listen_duration_seconds, alh.completed
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FROM audio_listening_history alh
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INNER JOIN posts p ON alh.post_id = p.post_id
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INNER JOIN users u ON p.user_id = u.user_id
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WHERE alh.user_id = ?
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ORDER BY alh.listened_at DESC
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LIMIT 50;
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*/
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