feat: bootstrap lunch picker miniapp with backend, docs, and branding assets

template/docs/db/schema.sql

@@ -0,0 +1,127 @@
+-- Lunch MiniApp MVP MySQL Schema
+-- Assumption: MySQL 8.0+
+-- Charset/Collation: utf8mb4
+
+set names utf8mb4;
+
+-- 1) users
+create table if not exists app_user (
+  id char(36) not null,
+  provider varchar(32) not null default 'toss',
+  provider_user_id varchar(128) not null,
+  nick_name varchar(50) not null,
+  created_at timestamp not null default current_timestamp,
+  updated_at timestamp not null default current_timestamp on update current_timestamp,
+  primary key (id),
+  unique key uk_app_user_provider (provider, provider_user_id)
+) engine=InnoDB default charset=utf8mb4 collate=utf8mb4_0900_ai_ci;
+
+-- 2) restaurants
+create table if not exists restaurant (
+  id char(36) not null,
+  external_place_id varchar(128) null,
+  name varchar(120) not null,
+  category varchar(20) not null,
+  address varchar(255) not null,
+  phone varchar(30) null,
+  opening_hours text null,
+  lat double not null,
+  lng double not null,
+  is_active tinyint(1) not null default 1,
+  created_at timestamp not null default current_timestamp,
+  updated_at timestamp not null default current_timestamp on update current_timestamp,
+  primary key (id),
+  unique key uk_restaurant_external_place_id (external_place_id),
+  key idx_restaurant_lat_lng (lat, lng),
+  key idx_restaurant_category (category),
+  constraint chk_restaurant_category check (category in ('KOREAN','CHINESE','JAPANESE','WESTERN','OTHER'))
+) engine=InnoDB default charset=utf8mb4 collate=utf8mb4_0900_ai_ci;
+
+-- 3) reviews (1 user : 1 restaurant)
+create table if not exists restaurant_review (
+  id char(36) not null,
+  restaurant_id char(36) not null,
+  user_id char(36) not null,
+  rating tinyint not null,
+  content varchar(500) not null,
+  deleted_at timestamp null,
+  created_at timestamp not null default current_timestamp,
+  updated_at timestamp not null default current_timestamp on update current_timestamp,
+  primary key (id),
+  unique key uk_review_restaurant_user (restaurant_id, user_id),
+  key idx_review_restaurant_created_at (restaurant_id, created_at),
+  key idx_review_user_created_at (user_id, created_at),
+  constraint fk_review_restaurant foreign key (restaurant_id) references restaurant(id) on delete cascade,
+  constraint fk_review_user foreign key (user_id) references app_user(id) on delete cascade,
+  constraint chk_review_rating check (rating between 1 and 5)
+) engine=InnoDB default charset=utf8mb4 collate=utf8mb4_0900_ai_ci;
+
+-- 4) likes (1 user : 1 restaurant)
+create table if not exists restaurant_like (
+  restaurant_id char(36) not null,
+  user_id char(36) not null,
+  created_at timestamp not null default current_timestamp,
+  primary key (restaurant_id, user_id),
+  key idx_like_restaurant (restaurant_id),
+  key idx_like_user (user_id),
+  constraint fk_like_restaurant foreign key (restaurant_id) references restaurant(id) on delete cascade,
+  constraint fk_like_user foreign key (user_id) references app_user(id) on delete cascade
+) engine=InnoDB default charset=utf8mb4 collate=utf8mb4_0900_ai_ci;
+
+-- 5) denormalized stats
+create table if not exists restaurant_stat (
+  restaurant_id char(36) not null,
+  review_count int not null default 0,
+  like_count int not null default 0,
+  rating_sum int not null default 0,
+  average_rating decimal(3,2) not null default 0.00,
+  updated_at timestamp not null default current_timestamp on update current_timestamp,
+  primary key (restaurant_id),
+  constraint fk_stat_restaurant foreign key (restaurant_id) references restaurant(id) on delete cascade
+) engine=InnoDB default charset=utf8mb4 collate=utf8mb4_0900_ai_ci;
+
+-- optional seed behavior:
+-- insert into restaurant_stat (restaurant_id)
+-- select r.id from restaurant r
+-- on duplicate key update restaurant_id = values(restaurant_id);
+
+-- 6) stat refresh procedure (call from app service after write)
+drop procedure if exists refresh_restaurant_stat;
+delimiter $$
+create procedure refresh_restaurant_stat(in p_restaurant_id char(36))
+begin
+  declare v_review_count int default 0;
+  declare v_like_count int default 0;
+  declare v_rating_sum int default 0;
+  declare v_average decimal(3,2) default 0.00;
+
+  select count(*), ifnull(sum(r.rating), 0)
+    into v_review_count, v_rating_sum
+  from restaurant_review r
+  where r.restaurant_id = p_restaurant_id
+    and r.deleted_at is null;
+
+  select count(*)
+    into v_like_count
+  from restaurant_like l
+  where l.restaurant_id = p_restaurant_id;
+
+  if v_review_count = 0 then
+    set v_average = 0.00;
+  else
+    set v_average = round(v_rating_sum / v_review_count, 2);
+  end if;
+
+  insert into restaurant_stat (
+    restaurant_id, review_count, like_count, rating_sum, average_rating, updated_at
+  ) values (
+    p_restaurant_id, v_review_count, v_like_count, v_rating_sum, v_average, current_timestamp
+  )
+  on duplicate key update
+    review_count = values(review_count),
+    like_count = values(like_count),
+    rating_sum = values(rating_sum),
+    average_rating = values(average_rating),
+    updated_at = current_timestamp;
+end $$
+delimiter ;