From b07c4a068a88e142b5341cf41d81ce594235b35b Mon Sep 17 00:00:00 2001
From: Mann Patel <130435633+Patel-Mann@users.noreply.github.com>
Date: Sat, 14 Feb 2026 16:13:03 -0700
Subject: [PATCH] init: mysql schema

---
 schema.sql | 225 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 225 insertions(+)
 create mode 100644 schema.sql

diff --git a/schema.sql b/schema.sql
new file mode 100644
index 0000000..bc3b668
--- /dev/null
+++ b/schema.sql
@@ -0,0 +1,225 @@
+-- ============================================
+-- ARCHIVAL AUDIO SOCIAL MEDIA APP - DATABASE SCHEMA
+-- ============================================
+
+-- Users Table
+CREATE TABLE users (
+    user_id INT PRIMARY KEY AUTO_INCREMENT,
+    username VARCHAR(50) UNIQUE NOT NULL,
+    email VARCHAR(100) UNIQUE NOT NULL,
+    password_hash VARCHAR(255) NOT NULL,
+    display_name VARCHAR(100),
+    profile_image_url VARCHAR(255),
+    bio TEXT,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+    is_active BOOLEAN DEFAULT TRUE,
+    INDEX idx_username (username),
+    INDEX idx_email (email)
+);
+
+-- Categories Table
+CREATE TABLE categories (
+    category_id INT PRIMARY KEY AUTO_INCREMENT,
+    name VARCHAR(100) NOT NULL,
+    description TEXT,
+    parent_category_id INT NULL, -- For subcategories
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    FOREIGN KEY (parent_category_id) REFERENCES categories(category_id) ON DELETE SET NULL,
+    INDEX idx_name (name)
+);
+
+-- Posts Table
+CREATE TABLE posts (
+    post_id INT PRIMARY KEY AUTO_INCREMENT,
+    user_id INT NOT NULL,
+    title VARCHAR(255),
+    transcribed_text TEXT, -- Text generated from audio
+    audio_url VARCHAR(255) NOT NULL, -- URL to stored audio file
+    audio_duration_seconds INT, -- Duration in seconds
+    image_url VARCHAR(255), -- Optional image
+    is_private BOOLEAN DEFAULT FALSE, -- TRUE = private, FALSE = public
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+    FOREIGN KEY (user_id) REFERENCES users(user_id) ON DELETE CASCADE,
+    INDEX idx_user_id (user_id),
+    INDEX idx_created_at (created_at),
+    INDEX idx_is_private (is_private),
+    FULLTEXT idx_fulltext_search (title, transcribed_text)
+);
+
+-- Post Categories (Many-to-Many relationship)
+CREATE TABLE post_categories (
+    post_id INT NOT NULL,
+    category_id INT NOT NULL,
+    PRIMARY KEY (post_id, category_id),
+    FOREIGN KEY (post_id) REFERENCES posts(post_id) ON DELETE CASCADE,
+    FOREIGN KEY (category_id) REFERENCES categories(category_id) ON DELETE CASCADE,
+    INDEX idx_category_id (category_id)
+);
+
+-- User Category Follows (for feed recommendations)
+CREATE TABLE user_category_follows (
+    user_id INT NOT NULL,
+    category_id INT NOT NULL,
+    followed_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    PRIMARY KEY (user_id, category_id),
+    FOREIGN KEY (user_id) REFERENCES users(user_id) ON DELETE CASCADE,
+    FOREIGN KEY (category_id) REFERENCES categories(category_id) ON DELETE CASCADE,
+    INDEX idx_user_id (user_id),
+    INDEX idx_category_id (category_id)
+);
+
+-- User Follows (following other users)
+CREATE TABLE user_follows (
+    follower_id INT NOT NULL,
+    following_id INT NOT NULL,
+    followed_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    PRIMARY KEY (follower_id, following_id),
+    FOREIGN KEY (follower_id) REFERENCES users(user_id) ON DELETE CASCADE,
+    FOREIGN KEY (following_id) REFERENCES users(user_id) ON DELETE CASCADE,
+    INDEX idx_follower_id (follower_id),
+    INDEX idx_following_id (following_id)
+);
+
+-- Post Likes (engagement tracking)
+CREATE TABLE post_likes (
+    user_id INT NOT NULL,
+    post_id INT NOT NULL,
+    liked_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    PRIMARY KEY (user_id, post_id),
+    FOREIGN KEY (user_id) REFERENCES users(user_id) ON DELETE CASCADE,
+    FOREIGN KEY (post_id) REFERENCES posts(post_id) ON DELETE CASCADE,
+    INDEX idx_post_id (post_id),
+    INDEX idx_liked_at (liked_at)
+);
+
+-- Comments (engagement tracking)
+CREATE TABLE comments (
+    comment_id INT PRIMARY KEY AUTO_INCREMENT,
+    post_id INT NOT NULL,
+    user_id INT NOT NULL,
+    comment_text TEXT NOT NULL,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+    FOREIGN KEY (post_id) REFERENCES posts(post_id) ON DELETE CASCADE,
+    FOREIGN KEY (user_id) REFERENCES users(user_id) ON DELETE CASCADE,
+    INDEX idx_post_id (post_id),
+    INDEX idx_user_id (user_id),
+    INDEX idx_created_at (created_at)
+);
+
+-- Audio Listening History (for recommendations)
+CREATE TABLE audio_listening_history (
+    history_id INT PRIMARY KEY AUTO_INCREMENT,
+    user_id INT NOT NULL,
+    post_id INT NOT NULL,
+    listened_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    listen_duration_seconds INT, -- How long they actually listened
+    completed BOOLEAN DEFAULT FALSE, -- Did they listen to the end?
+    FOREIGN KEY (user_id) REFERENCES users(user_id) ON DELETE CASCADE,
+    FOREIGN KEY (post_id) REFERENCES posts(post_id) ON DELETE CASCADE,
+    INDEX idx_user_id (user_id),
+    INDEX idx_post_id (post_id),
+    INDEX idx_listened_at (listened_at)
+);
+
+-- Search History (for recommendations)
+CREATE TABLE search_history (
+    search_id INT PRIMARY KEY AUTO_INCREMENT,
+    user_id INT NOT NULL,
+    search_query VARCHAR(255) NOT NULL,
+    searched_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    FOREIGN KEY (user_id) REFERENCES users(user_id) ON DELETE CASCADE,
+    INDEX idx_user_id (user_id),
+    INDEX idx_searched_at (searched_at),
+    INDEX idx_search_query (search_query)
+);
+
+-- Bookmarks/Saved Posts
+CREATE TABLE bookmarks (
+    user_id INT NOT NULL,
+    post_id INT NOT NULL,
+    bookmarked_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    PRIMARY KEY (user_id, post_id),
+    FOREIGN KEY (user_id) REFERENCES users(user_id) ON DELETE CASCADE,
+    FOREIGN KEY (post_id) REFERENCES posts(post_id) ON DELETE CASCADE,
+    INDEX idx_user_id (user_id),
+    INDEX idx_bookmarked_at (bookmarked_at)
+);
+
+-- ============================================
+-- SAMPLE SEED DATA
+-- ============================================
+
+-- Insert sample categories
+INSERT INTO categories (name, description) VALUES
+('Historical Events', 'Posts about significant historical events and eras'),
+('Cultural Traditions', 'Cultural practices, traditions, and heritage'),
+('Personal Stories', 'Individual memories and personal narratives'),
+('Oral History', 'Recorded oral histories and interviews'),
+('Family History', 'Family stories and genealogy'),
+('Local History', 'Community and local historical accounts');
+
+-- ============================================
+-- USEFUL QUERIES FOR THE APPLICATION
+-- ============================================
+
+-- Query 1: Get personalized feed for a user
+-- (Combines posts from followed users, followed categories, and engagement patterns)
+/*
+SELECT DISTINCT p.*, u.username, u.display_name
+FROM posts p
+INNER JOIN users u ON p.user_id = u.user_id
+LEFT JOIN post_categories pc ON p.post_id = pc.post_id
+LEFT JOIN user_category_follows ucf ON pc.category_id = ucf.category_id AND ucf.user_id = ?
+LEFT JOIN user_follows uf ON p.user_id = uf.following_id AND uf.follower_id = ?
+WHERE p.is_private = FALSE
+  AND (ucf.user_id IS NOT NULL OR uf.follower_id IS NOT NULL OR p.user_id = ?)
+ORDER BY p.created_at DESC
+LIMIT 50;
+*/
+
+-- Query 2: Search posts by text (uses FULLTEXT index)
+/*
+SELECT p.*, u.username, MATCH(p.title, p.transcribed_text) AGAINST(? IN NATURAL LANGUAGE MODE) AS relevance
+FROM posts p
+INNER JOIN users u ON p.user_id = u.user_id
+WHERE MATCH(p.title, p.transcribed_text) AGAINST(? IN NATURAL LANGUAGE MODE)
+  AND (p.is_private = FALSE OR p.user_id = ?)
+ORDER BY relevance DESC
+LIMIT 50;
+*/
+
+-- Query 3: Get user's private posts
+/*
+SELECT p.*, COUNT(DISTINCT pl.user_id) as like_count, COUNT(DISTINCT c.comment_id) as comment_count
+FROM posts p
+LEFT JOIN post_likes pl ON p.post_id = pl.post_id
+LEFT JOIN comments c ON p.post_id = c.post_id
+WHERE p.user_id = ? AND p.is_private = TRUE
+GROUP BY p.post_id
+ORDER BY p.created_at DESC;
+*/
+
+-- Query 4: Get posts by category
+/*
+SELECT p.*, u.username, u.display_name
+FROM posts p
+INNER JOIN users u ON p.user_id = u.user_id
+INNER JOIN post_categories pc ON p.post_id = pc.post_id
+WHERE pc.category_id = ? AND p.is_private = FALSE
+ORDER BY p.created_at DESC
+LIMIT 50;
+*/
+
+-- Query 5: Get user's listening history
+/*
+SELECT p.*, u.username, alh.listened_at, alh.listen_duration_seconds, alh.completed
+FROM audio_listening_history alh
+INNER JOIN posts p ON alh.post_id = p.post_id
+INNER JOIN users u ON p.user_id = u.user_id
+WHERE alh.user_id = ?
+ORDER BY alh.listened_at DESC
+LIMIT 50;
+*/