feat(db): add init script

sql/init.sql

@@ -0,0 +1,54 @@
+CREATE DATABASE r_calendar ENCODING 'UTF-8';
+
+\c r_calendar
+
+CREATE TABLE IF NOT EXISTS c_user (
+    id SERIAL PRIMARY KEY NOT NULL,
+    name TEXT NOT NULL,
+    email TEXT,
+    password TEXT NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS calendar (
+    id SERIAL PRIMARY KEY NOT NULL,
+    name TEXT NOT NULL,
+    url TEXT,
+    is_public BOOLEAN DEFAULT TRUE
+);
+
+CREATE TABLE IF NOT EXISTS event (
+    id SERIAL PRIMARY KEY NOT NULL,
+    name TEXT NOT NULL,
+    site TEXT,
+    is_private BOOLEAN DEFAULT TRUE
+);
+
+CREATE TABLE IF NOT EXISTS edition (
+    id SERIAL PRIMARY KEY NOT NULL,
+    date_from INT NOT NULL CHECK (date_from > 0),
+    date_to INT CHECK (date_to > date_from),
+    name TEXT NOT NULL,
+    location TEXT NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS event_in_calendar (
+    calendar_id INT REFERENCES calendar(id) NOT NULL,
+    event_id INT REFERENCES event(id),
+    PRIMARY KEY (calendar_id, event_id)
+);
+
+CREATE TABLE IF NOT EXISTS user_in_calendar (
+    calendar_id INT REFERENCES calendar(id) NOT NULL,
+    user_id INT REFERENCES c_user(id) NOT NULL,
+    can_write BOOLEAN DEFAULT FALSE,
+    is_owner BOOLEAN DEFAULT FALSE,
+    PRIMARY KEY (calendar_id, user_id)
+);
+
+CREATE TABLE IF NOT EXISTS user_in_event (
+    user_id INT REFERENCES c_user(id) NOT NULL,
+    event_id INT REFERENCES event(id) NOT NULL,
+    can_write BOOLEAN DEFAULT FALSE,
+    is_owner BOOLEAN DEFAULT FALSE,
+    PRIMARY KEY (event_id, user_id)
+);