added adding and editing of availabilities

backend/setup.sql

@@ -0,0 +1,47 @@
+CREATE TABLE IF NOT EXISTS TASKS (
+	id INTEGER PRIMARY KEY,
+	text varchar(64) NOT NULL,
+	enabled BOOL DEFAULT(true)
+);
+
+CREATE TABLE IF NOT EXISTS AVAILABILITIES (
+	id INTEGER PRIMARY KEY,
+	text varchar(32) NOT NULL,
+	color varchar(7) NOT NULL,
+	enabled BOOL DEFAULT(true)
+);
+
+CREATE TABLE IF NOT EXISTS USERS (
+	name varchar(64) PRIMARY KEY,
+	password binary(60) NOT NULL,
+	admin BOOL NOT NULL DEFAULT(false),
+	tokenID varchar(64) NOT NULL,
+	CHECK (length(password) = 60),
+	CHECK (length(tokenID) = 36)
+);
+
+CREATE TABLE IF NOT EXISTS EVENTS (
+	id INTEGER PRIMARY KEY,
+	date DATETIME NOT NULL,
+	description TEXT DEFAULT "" 
+);
+
+CREATE TABLE IF NOT EXISTS USER_AVAILABILITIES (
+	userName varchar(64) NOT NULL,
+	eventID INTEGER NOT NULL,
+	availabilityID INTEGER NOT NULL,
+	PRIMARY KEY (userName, eventID),
+	FOREIGN KEY (userName) REFERENCES USERS(name) ON DELETE CASCADE ON UPDATE CASCADE,
+	FOREIGN KEY (eventID) REFERENCES EVENTS(id) ON DELETE CASCADE ON UPDATE CASCADE,
+	FOREIGN KEY (availabilityID) REFERENCES AVAILABILITIES(id) ON UPDATE CASCADE
+);
+
+CREATE TABLE IF NOT EXISTS USER_ASSIGNMENTS (
+	eventID INTEGER NOT NULL,
+	taskID INTEGER NOT NULL,
+	userName varchar(64),
+	PRIMARY KEY (eventID, taskID),
+	FOREIGN KEY (eventID) REFERENCES EVENTS(id) ON DELETE CASCADE,
+	FOREIGN KEY (userName) REFERENCES USERS(name) ON DELETE CASCADE ON UPDATE CASCADE,
+	FOREIGN KEY (taskID) REFERENCES TASKS(id) ON UPDATE CASCADE
+);