Major changes to DB schema for listings/chat system/users/locations

db/final_db.sql

@@ -8,6 +8,8 @@ CREATE EXTENSION IF NOT EXISTS "pgcrypto";
 CREATE EXTENSION IF NOT EXISTS "uuid-ossp";
 CREATE EXTENSION IF NOT EXISTS "postgis"; -- Crucial for "Near Me" filters
 
+SET timezone TO 'UTC';
+
 -- 2. GLOBAL FUNCTIONS (Timestamps)
 -- ======================================================
 CREATE OR REPLACE FUNCTION set_updated_at()
@@ -47,10 +49,10 @@ BEGIN
         CREATE TYPE seller_type_enum AS ENUM ('owner','farmer','broker','agent','other');
     END IF;
     IF NOT EXISTS (SELECT 1 FROM pg_type WHERE typname = 'listing_role_enum') THEN
-        CREATE TYPE listing_role_enum AS ENUM ('user','admin','moderator');
+        CREATE TYPE listing_role_enum AS ENUM ('seller_buyer','service_provider');
     END IF;
     IF NOT EXISTS (SELECT 1 FROM pg_type WHERE typname = 'user_type_enum') THEN
-        CREATE TYPE user_type_enum AS ENUM ('seller','buyer','service_provider');
+        CREATE TYPE user_type_enum AS ENUM ('user','admin','moderator');
     END IF;
     IF NOT EXISTS (SELECT 1 FROM pg_type WHERE typname = 'message_type_enum') THEN
         CREATE TYPE message_type_enum AS ENUM ('text','media','both');
@@ -73,10 +75,27 @@ BEGIN
     IF NOT EXISTS (SELECT 1 FROM pg_type WHERE typname = 'analytics_event_type_enum') THEN
         CREATE TYPE analytics_event_type_enum AS ENUM ('views_count','bookmarks_count','enquiries_call_count','enquiries_whatsapp_count');
     END IF;
+    IF NOT EXISTS (SELECT 1 FROM pg_type WHERE typname = 'listing_score_status_enum') THEN
+        CREATE TYPE listing_score_status_enum AS ENUM ('pending', 'processing', 'completed', 'failed');
+    END IF;
 END $$;
 
 -- 4. USERS & AUTHENTICATION
 -- ======================================================
+CREATE TABLE subscription_plans (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    name VARCHAR(100) NOT NULL UNIQUE,
+    description TEXT,
+    price NUMERIC(10, 2),
+    currency VARCHAR(10) DEFAULT 'INR',
+    duration_days INT, -- Validity in days
+    features JSONB, -- Flexible JSON for features like {"max_listings": 10}
+    is_active BOOLEAN DEFAULT TRUE,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+CREATE TRIGGER trg_subscription_plans_updated_at BEFORE UPDATE ON subscription_plans FOR EACH ROW EXECUTE FUNCTION set_updated_at();
+
 CREATE TABLE users (
     id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
     phone_number VARCHAR(20) UNIQUE,
@@ -85,14 +104,19 @@ CREATE TABLE users (
     language VARCHAR(10),
     timezone VARCHAR(50),
     is_active BOOLEAN NOT NULL DEFAULT TRUE,
-    role listing_role_enum NOT NULL DEFAULT 'user',
+    roles listing_role_enum[] NOT NULL DEFAULT '{seller_buyer}',
-    user_type user_type_enum,
+    current_role listing_role_enum NOT NULL DEFAULT 'seller_buyer',
+    user_type user_type_enum NOT NULL DEFAULT 'user',
     country_code VARCHAR(10) NOT NULL DEFAULT '+91',
     
     -- Seller Ratings (Cached for speed)
     rating_average NUMERIC(3, 2) DEFAULT 0.00,
     rating_count INT DEFAULT 0,
 
+    -- Subscription Info
+    subscription_plan_id UUID REFERENCES subscription_plans(id) ON DELETE SET NULL,
+    subscription_expires_at TIMESTAMPTZ,
+
     deleted BOOLEAN NOT NULL DEFAULT FALSE,
     created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
     updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
@@ -119,6 +143,8 @@ CREATE TABLE user_devices (
     device_identifier TEXT,
     device_platform TEXT NOT NULL,
     fcm_token TEXT, -- For Push Notifications
+    lat NUMERIC(10,7),
+    lng NUMERIC(10,7),
     last_seen_at TIMESTAMPTZ,
     is_active BOOLEAN NOT NULL DEFAULT TRUE,
     created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
@@ -134,18 +160,6 @@ CREATE TABLE refresh_tokens (
     created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
 );
 
-CREATE TABLE user_contacts (
-    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
-    user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
-    contact_user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
-    is_blocked BOOLEAN NOT NULL DEFAULT FALSE,
-    deleted BOOLEAN NOT NULL DEFAULT FALSE,
-    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
-    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
-    UNIQUE(user_id, contact_user_id)
-);
-CREATE TRIGGER trg_user_contacts_updated_at BEFORE UPDATE ON user_contacts FOR EACH ROW EXECUTE FUNCTION set_updated_at();
-
 -- 5. MASTER DATA (Species & Breeds)
 -- ======================================================
 CREATE TABLE species (
@@ -183,6 +197,14 @@ CREATE TABLE locations (
         ELSE NULL END
     ) STORED,
 
+    is_saved_address BOOLEAN NOT NULL DEFAULT FALSE,
+    location_type location_type_enum,
+    country VARCHAR(100),
+    state VARCHAR(100),
+    district VARCHAR(100),
+    city_village VARCHAR(150),
+    pincode VARCHAR(20),
+
     source_type source_type_enum DEFAULT 'unknown',
     selected_location BOOLEAN NOT NULL DEFAULT FALSE,
     deleted BOOLEAN NOT NULL DEFAULT FALSE,
@@ -192,20 +214,7 @@ CREATE TABLE locations (
 CREATE INDEX idx_locations_geog ON locations USING GIST (geog); -- Spatial Index
 CREATE TRIGGER trg_locations_updated_at BEFORE UPDATE ON locations FOR EACH ROW EXECUTE FUNCTION set_updated_at();
 
-CREATE TABLE location_details (
+
-    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
-    location_id UUID UNIQUE NOT NULL REFERENCES locations(id) ON DELETE CASCADE,
-    is_saved_address BOOLEAN NOT NULL DEFAULT FALSE,
-    location_type location_type_enum,
-    country VARCHAR(100),
-    state VARCHAR(100),
-    district VARCHAR(100),
-    city_village VARCHAR(150),
-    pincode VARCHAR(20),
-    deleted BOOLEAN NOT NULL DEFAULT FALSE,
-    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
-    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
-);
 
 -- 7. ANIMALS (The Inventory)
 -- ======================================================
@@ -225,6 +234,7 @@ CREATE TABLE animals (
     vaccinated BOOLEAN DEFAULT FALSE,
     dewormed BOOLEAN DEFAULT FALSE,
     pregnancy_status pregnancy_status_enum NOT NULL DEFAULT 'unknown',
+    calving_number INT,
     milk_yield_litre_per_day NUMERIC(8,3),
     ear_tag_no VARCHAR(100),
     description TEXT,
@@ -261,7 +271,16 @@ CREATE TABLE listings (
     filter_breed_id UUID,
     filter_sex sex_enum,
     filter_age_months INT,
+    filter_pregnancy_status pregnancy_status_enum,
+    filter_weight_kg NUMERIC(8,2),
+    filter_calving_number INT,
+    filter_milking_capacity NUMERIC(8,3),
     filter_location_geog GEOGRAPHY(POINT, 4326),
+    
+    -- AI Score
+    listing_score INT,
+    listing_score_status listing_score_status_enum DEFAULT 'pending',
+
     thumbnail_url TEXT, 
 
     -- FULL TEXT SEARCH (Auto-generated)
@@ -352,7 +371,8 @@ CREATE TABLE reviews (
     listing_id UUID REFERENCES listings(id) ON DELETE SET NULL,
     reviewer_id UUID REFERENCES users(id),
     reviewee_id UUID REFERENCES users(id),
-    rating INT CHECK (rating >= 1 AND rating <= 5),
+    listing_rating INT CHECK (listing_rating >= 1 AND listing_rating <= 5),
+    seller_rating INT CHECK (seller_rating >= 1 AND seller_rating <= 5),
     comment TEXT,
     created_at TIMESTAMPTZ DEFAULT NOW(),
     UNIQUE(listing_id, reviewer_id)
@@ -364,35 +384,38 @@ CREATE TABLE conversations (
     id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
     buyer_id UUID NOT NULL REFERENCES users(id),
     seller_id UUID NOT NULL REFERENCES users(id),
+    
+    -- Denormalized Fields for Listing
+    last_message_content TEXT,
+    last_message_at TIMESTAMPTZ,
+    last_call_at TIMESTAMPTZ,
+
     deleted BOOLEAN NOT NULL DEFAULT FALSE,
     created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
     updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
     UNIQUE(buyer_id, seller_id)
 );
 
-CREATE TABLE conversation_media (
-    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
-    media_type media_type_enum NOT NULL,
-    media_url TEXT NOT NULL,
-    thumbnail_url TEXT,
-    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
-);
-
 CREATE TABLE messages (
-    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    id BIGSERIAL PRIMARY KEY, -- Changed to BIGINT for cursor pagination
     conversation_id UUID NOT NULL REFERENCES conversations(id) ON DELETE CASCADE,
     sender_id UUID NOT NULL REFERENCES users(id),
     receiver_id UUID NOT NULL REFERENCES users(id),
+    
     message_type message_type_enum NOT NULL DEFAULT 'text',
     content TEXT,
-    media_id UUID UNIQUE REFERENCES conversation_media(id) ON DELETE SET NULL,
+    
+    -- Embedded Media
+    message_media TEXT, 
+    media_type media_type_enum,
+
     is_read BOOLEAN NOT NULL DEFAULT FALSE,
     read_at TIMESTAMPTZ,
     deleted BOOLEAN NOT NULL DEFAULT FALSE,
     created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
 );
--- Index for scrolling up in chat history (Newest first)
+-- Efficient Index for Cursor Pagination: (conversation as filter, id as cursor)
-CREATE INDEX idx_messages_history ON messages (conversation_id, created_at DESC) WHERE deleted = FALSE;
+CREATE INDEX idx_messages_pagination ON messages(conversation_id, id DESC) WHERE deleted = FALSE;
 
 CREATE TABLE communication_records (
     communication_id BIGSERIAL PRIMARY KEY,
@@ -415,8 +438,12 @@ DECLARE
     loc_geog GEOGRAPHY(POINT, 4326);
 BEGIN
     -- 1. Sync Animal Info
-    SELECT species_id, breed_id, sex, age_months 
+    SELECT 
-    INTO NEW.filter_species_id, NEW.filter_breed_id, NEW.filter_sex, NEW.filter_age_months
+        species_id, breed_id, sex, age_months, 
+        pregnancy_status, weight_kg, calving_number, milk_yield_litre_per_day
+    INTO 
+        NEW.filter_species_id, NEW.filter_breed_id, NEW.filter_sex, NEW.filter_age_months,
+        NEW.filter_pregnancy_status, NEW.filter_weight_kg, NEW.filter_calving_number, NEW.filter_milking_capacity
     FROM animals WHERE id = NEW.animal_id;
     
     -- 2. Sync Location Info
@@ -442,7 +469,7 @@ BEGIN
     UPDATE users
     SET 
         rating_count = (SELECT COUNT(*) FROM reviews WHERE reviewee_id = NEW.reviewee_id),
-        rating_average = (SELECT AVG(rating) FROM reviews WHERE reviewee_id = NEW.reviewee_id)
+        rating_average = (SELECT AVG(seller_rating) FROM reviews WHERE reviewee_id = NEW.reviewee_id)
     WHERE id = NEW.reviewee_id;
     RETURN NEW;
 END;
@@ -452,6 +479,37 @@ CREATE TRIGGER trg_update_rating
 AFTER INSERT OR UPDATE ON reviews
 FOR EACH ROW EXECUTE FUNCTION update_seller_rating();
 
+
+-- Trigger 3: Auto-Update Conversation Last Message & Call
+CREATE OR REPLACE FUNCTION update_conversation_latest()
+RETURNS TRIGGER AS $$
+BEGIN
+    IF TG_TABLE_NAME = 'messages' THEN
+        UPDATE conversations
+        SET 
+            last_message_content = NEW.content,
+            last_message_at = NEW.created_at,
+            updated_at = NOW()
+        WHERE id = NEW.conversation_id;
+    ELSIF TG_TABLE_NAME = 'communication_records' THEN
+        UPDATE conversations
+        SET 
+            last_call_at = NEW.created_at,
+            updated_at = NOW()
+        WHERE id = NEW.conversation_id;
+    END IF;
+    RETURN NEW;
+END;
+$$ LANGUAGE plpgsql;
+
+CREATE TRIGGER trg_update_conversation_msg
+AFTER INSERT ON messages
+FOR EACH ROW EXECUTE FUNCTION update_conversation_latest();
+
+CREATE TRIGGER trg_update_conversation_call
+AFTER INSERT ON communication_records
+FOR EACH ROW EXECUTE FUNCTION update_conversation_latest();
+
 -- ======================================================
 -- END OF SCRIPT
 -- ======================================================