Add database initialization

database/database.js

@@ -1,5 +1,6 @@
 const app = require('../app');
 const { Client } = require('pg');
+const fs = require('fs');
 
 if (process.env.NODE_ENV !== 'production' || process.env.NODE_ENV !== 'testing') {
   require('dotenv').config();
@@ -7,3 +8,34 @@ if (process.env.NODE_ENV !== 'production' || process.env.NODE_ENV !== 'testing')
 
 const client = new Client();
 client.connect();
+
+async function executeQuery(query, values = []) {
+    const result = await client.query({
+        rowMode: 'array',
+        text: query,
+        values: values
+    });
+    return result.rows;
+}
+
+async function InitializeDatabase() {
+    console.log("Initializing database...")
+    const sql = fs.readFileSync('database/init_database.sql').toString();
+    await executeQuery(sql);
+    console.log("Database initialized.")
+}
+
+
+
+
+async function checkForDatabaseInitialization() {
+    const query = `SELECT schema_name FROM information_schema.schemata WHERE schema_name = 'scores'`;
+    let result = await executeQuery(query);
+    
+    const scoresSchemaExists = result.length !== 0;
+
+    if(!scoresSchemaExists) {
+        InitializeDatabase();
+    }
+}
+checkForDatabaseInitialization();

database/init_database.sql

@@ -0,0 +1,105 @@
+/*  SCORE TRACKER DATABASE LAYOUT
+
+scores:
+
+    sports:
+        *sport_id*   |   name   |   currently_active
+    
+    divisions:
+        *division_id*   |   name   |   gender   |   *sport_id*   |   currently_active
+
+    teams:
+        *team_id*   |   name   |   ~sport_id~  |   currently_active
+
+    seasons:
+        *season_id*   |   school_year
+
+    games:
+        *game_id*   |   ~division_id~   |   ~season_id~  |   date   |   ~team1_id~  |   ~team2_id~   |   team1_score   |   team2_score   |   ~submitter_id~   |   updated_timestamp
+
+
+
+accounts:
+
+    users:
+        *user_id*   |   email   |   salt   |   password_hash   |   role   |   approved
+
+    sessions:
+        *session_id*   |   ~user_id~   |   expiration_date
+
+*/
+
+
+BEGIN;
+
+
+CREATE SCHEMA IF NOT EXISTS scores;
+
+
+CREATE TABLE IF NOT EXISTS scores.sports(
+        sport_id BIGINT GENERATED ALWAYS AS IDENTITY,
+        sport_name TEXT UNIQUE NOT NULL,
+        currently_active BOOLEAN DEFAULT TRUE,
+        PRIMARY KEY(sport_id)
+    );
+
+CREATE TABLE IF NOT EXISTS scores.divisions(
+        division_id BIGINT GENERATED ALWAYS AS IDENTITY,
+        division_name TEXT NOT NULL,
+        gender VARCHAR(1) CHECK (gender IN ( 'F', 'M' ) ),
+        sport_id BIGINT,
+        currently_active BOOLEAN DEFAULT TRUE,
+        PRIMARY KEY(division_id),
+        CONSTRAINT fk_sport
+            FOREIGN KEY(sport_id)
+                REFERENCES scores.sports(sport_id)
+    );
+
+CREATE TABLE IF NOT EXISTS scores.teams(
+        team_id BIGINT GENERATED ALWAYS AS IDENTITY,
+        team_name TEXT NOT NULL,
+        sport_id BIGINT,
+        currently_active BOOLEAN DEFAULT TRUE,
+        PRIMARY KEY(team_id),
+        CONSTRAINT fk_sport
+            FOREIGN KEY(sport_id)
+                REFERENCES scores.sports(sport_id)
+    );
+
+CREATE TABLE IF NOT EXISTS scores.seasons(
+        season_id BIGINT GENERATED ALWAYS AS IDENTITY,
+        school_year INTEGER NOT NULL,
+        PRIMARY KEY(season_id)
+    );
+
+CREATE TABLE IF NOT EXISTS scores.games(
+        game_id BIGINT GENERATED ALWAYS AS IDENTITY,
+        division_id BIGINT,
+        season_id BIGINT,
+        game_date DATE,
+        team1_id BIGINT,
+        team2_id BIGINT,
+        team1_score INTEGER,
+        team2_score INTEGER,
+/*        submitter_id BIGINT,*/
+        updated_timestamp TIMESTAMP WITH TIME ZONE DEFAULT now(),
+        PRIMARY KEY(game_id),
+        CONSTRAINT fk_division
+            FOREIGN KEY(division_id)
+                REFERENCES scores.divisions(division_id),
+        CONSTRAINT fk_season
+            FOREIGN KEY(season_id)
+                REFERENCES scores.seasons(season_id),
+        CONSTRAINT fk_team1
+            FOREIGN KEY(team1_id)
+                REFERENCES scores.teams(team_id),
+        CONSTRAINT fk_team2
+            FOREIGN KEY(team2_id)
+                REFERENCES scores.teams(team_id)
+/*        CONSTRAINT fk_submitter
+            FOREIGN KEY(submitter_id)
+                REFERENCES accounts.users(user_id)*/
+    );
+
+
+COMMIT;

routes/index.js

@@ -1,5 +1,6 @@
 var express = require('express');
 var router = express.Router();
+var database = require('../database/database');
 
 /* GET home page. */
 router.get('/', function(req, res, next) {