From 8cd9f26321316a28925b374a3aace5b47ba394cc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jonas=20J=C3=B8dest=C3=B8l=20Haugland?=
 <jonajha@stud.ntnu.no>
Date: Mon, 25 Apr 2022 12:31:58 +0200
Subject: [PATCH] Update Persistence

---
 Persistence.md | 59 +++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 58 insertions(+), 1 deletion(-)

diff --git a/Persistence.md b/Persistence.md
index cfe36d1..b7071d5 100644
--- a/Persistence.md
+++ b/Persistence.md
@@ -1 +1,58 @@
-## Persistence will be added once database and back-end is finished
\ No newline at end of file
+All data is stored in the MySQL-database. User sessions are stored in server memory. 
+
+#### ER-Diagram
+
+![entityRelationshipDiagram](uploads/c1ff984303b489fdbff06b26705af2a0/entityRelationshipDiagram.png)
+
+
+##### The SQL calls to create the database tables needed:
+
+```sql
+-- WARNING: Will delete EVERYTHING in the database!
+
+DROP TABLE IF EXISTS matches;
+DROP TABLE IF EXISTS teams;
+DROP TABLE IF EXISTS tournaments;
+DROP TABLE IF EXISTS users;
+
+-- Create the tables
+CREATE TABLE tournaments (
+    id INTEGER PRIMARY KEY AUTO_INCREMENT,
+    name TEXT NOT NULL,
+    description TEXT,
+    prize TEXT,
+    teamLimit INTEGER NOT NULL,
+    startTime DATETIME NOT NULL,
+    endTime DATETIME NOT NULL
+);
+
+CREATE TABLE teams (
+    id INTEGER PRIMARY KEY AUTO_INCREMENT,
+    tournamentId INTEGER NOT NULL,
+    name TEXT NOT NULL,
+
+    FOREIGN KEY (tournamentId) REFERENCES tournaments (id) ON DELETE CASCADE
+);
+
+CREATE TABLE matches (
+    id INTEGER PRIMARY KEY AUTO_INCREMENT,
+    tournamentId INTEGER NOT NULL,
+    parentMatchId INTEGER,
+    team1Id INTEGER,
+    team2Id INTEGER,
+    winnerId INTEGER,
+    tier INTEGER,
+
+    FOREIGN KEY (tournamentId) REFERENCES tournaments (id) ON DELETE CASCADE,
+    FOREIGN KEY (team1Id) REFERENCES teams (id) ON DELETE SET NULL,
+    FOREIGN KEY (team2Id) REFERENCES teams (id) ON DELETE SET NULL,
+    FOREIGN KEY (winnerId) REFERENCES teams (id) ON DELETE SET NULL
+);
+
+CREATE TABLE users (
+    id INTEGER PRIMARY KEY AUTO_INCREMENT,
+    googleId TEXT,
+    name TEXT,
+    email TEXT NOT NULL,
+    isManager BOOLEAN NOT NULL
+);
\ No newline at end of file