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https://github.com/matt-fidd/stratos.git
synced 2026-01-01 18:39:32 +00:00
Added database initialisation script and mysql2 npm package
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331
utility/db/dbInit.js
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331
utility/db/dbInit.js
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'use strict';
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// Import required modules
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const mysql = require('mysql2/promise');
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const path = require('path');
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// Initialise maps for table creation and constraint queries
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const tableCreate = new Map();
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const tableConstraints = new Map();
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// For each table, set tableCreate.tableName equal to the creation statment
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// for that table
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tableCreate.set('account', `
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CREATE TABLE IF NOT EXISTS account (
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accountId varchar(36) NOT NULL PRIMARY KEY,
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email varchar(255) NOT NULL ,
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firstName varchar(50) NOT NULL ,
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otherNames varchar(255) NOT NULL ,
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lastName varchar(50) NOT NULL ,
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password varchar(60) NOT NULL ,
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CONSTRAINT Unq_account_email UNIQUE ( email )
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);
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`);
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tableCreate.set('parent', `
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CREATE TABLE IF NOT EXISTS parent (
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parentId varchar(36) NOT NULL PRIMARY KEY,
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email varchar(255) NOT NULL ,
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firstName varchar(50) NOT NULL ,
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otherNames varchar(50) NOT NULL ,
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lastName varchar(50) NOT NULL ,
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password varchar(60) NOT NULL ,
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CONSTRAINT Unq_parent UNIQUE ( email )
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);
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`);
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tableCreate.set('student', `
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CREATE TABLE IF NOT EXISTS student (
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studentId varchar(36) NOT NULL PRIMARY KEY,
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email varchar(255) NOT NULL ,
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firstName varchar(50) NOT NULL ,
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otherNames varchar(50) NOT NULL ,
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lastName varchar(50) NOT NULL ,
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password varchar(60) NOT NULL ,
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CONSTRAINT Unq_student UNIQUE ( email )
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);
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`);
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tableCreate.set('studentParentLink', `
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CREATE TABLE IF NOT EXISTS studentParentLink (
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studentid varchar(36) NOT NULL ,
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parentId varchar(36) NOT NULL ,
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CONSTRAINT pk_studentparentlink_studentid
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PRIMARY KEY ( studentid, parentId )
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);
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`);
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tableCreate.set('subject', `
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CREATE TABLE IF NOT EXISTS subject (
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subjectId int NOT NULL AUTO_INCREMENT PRIMARY KEY,
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name varchar(100) NOT NULL
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);
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`);
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tableCreate.set('testTemplate', `
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CREATE TABLE IF NOT EXISTS testTemplate (
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testTemplateId varchar(36) NOT NULL PRIMARY KEY,
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accountId varchar(36) NOT NULL ,
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name varchar(100) NOT NULL ,
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maxMark int NOT NULL
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);
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`);
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tableCreate.set('class', `
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CREATE TABLE IF NOT EXISTS class (
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classId varchar(36) NOT NULL PRIMARY KEY,
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name varchar(50) NOT NULL ,
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subjectId int NOT NULL
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);
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`);
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tableCreate.set('passwordReset', `
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CREATE TABLE IF NOT EXISTS passwordReset (
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accountId varchar(36) NOT NULL PRIMARY KEY,
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token varchar(60) NOT NULL ,
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nonce varchar(16) NOT NULL ,
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expires datetime NOT NULL
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);
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`);
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tableCreate.set('studentClassLink', `
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CREATE TABLE IF NOT EXISTS studentClassLink (
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studentId varchar(36) NOT NULL ,
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classId varchar(36) NOT NULL ,
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CONSTRAINT Pk_studentClassLink_studentId
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PRIMARY KEY ( studentId, classId )
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);
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`);
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tableCreate.set('test', `
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CREATE TABLE IF NOT EXISTS test (
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testId varchar(36) NOT NULL PRIMARY KEY,
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testTemplateId varchar(36) NOT NULL ,
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classId varchar(36) NOT NULL ,
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testDate date NOT NULL ,
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CONSTRAINT Unq_test UNIQUE ( testTemplateId, classId, testDate )
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);
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`);
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tableCreate.set('testResult', `
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CREATE TABLE IF NOT EXISTS testResult (
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studentId varchar(36) NOT NULL ,
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testId varchar(36) NOT NULL ,
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accountId varchar(36) NOT NULL ,
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mark int NOT NULL ,
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CONSTRAINT primarykey PRIMARY KEY ( studentId, testId )
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);
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`);
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tableCreate.set('accountClassLink', `
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CREATE TABLE IF NOT EXISTS accountClassLink (
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accountId varchar(36) NOT NULL ,
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classId varchar(36) NOT NULL ,
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CONSTRAINT primarykey PRIMARY KEY ( accountId, classId )
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);
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`);
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// For each table constraint, set tableConstraints.constraitName equal to the
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// creation statment for that constraint
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tableConstraints.set('accountClassLink_fk0', `
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ALTER TABLE accountClassLink
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ADD CONSTRAINT accountClassLink_fk0
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FOREIGN KEY IF NOT EXISTS ( accountId )
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REFERENCES account( accountId )
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ON DELETE CASCADE
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ON UPDATE NO ACTION;
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`);
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tableConstraints.set('accountClassLink_fk1', `
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ALTER TABLE accountClassLink
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ADD CONSTRAINT accountClassLink_fk1
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FOREIGN KEY IF NOT EXISTS ( classId )
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REFERENCES class( classId )
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ON DELETE CASCADE
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ON UPDATE NO ACTION;
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`);
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tableConstraints.set('class_fk0', `
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ALTER TABLE class
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ADD CONSTRAINT class_fk0
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FOREIGN KEY IF NOT EXISTS ( subjectId )
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REFERENCES subject( subjectId )
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ON DELETE RESTRICT
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ON UPDATE NO ACTION;
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`);
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tableConstraints.set('fk_passwordreset_account', `
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ALTER TABLE passwordReset
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ADD CONSTRAINT fk_passwordreset_account
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FOREIGN KEY IF NOT EXISTS ( accountId )
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REFERENCES account( accountId )
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ON DELETE CASCADE
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ON UPDATE NO ACTION;
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`);
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tableConstraints.set('fk_passwordreset_parent', `
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ALTER TABLE passwordReset
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ADD CONSTRAINT fk_passwordreset_parent
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FOREIGN KEY IF NOT EXISTS ( accountId )
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REFERENCES parent( parentId )
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ON DELETE CASCADE
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ON UPDATE NO ACTION;
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`);
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tableConstraints.set('fk_passwordreset_student', `
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ALTER TABLE passwordReset
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ADD CONSTRAINT fk_passwordreset_student
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FOREIGN KEY IF NOT EXISTS ( accountId )
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REFERENCES student( studentId )
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ON DELETE CASCADE
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ON UPDATE NO ACTION;
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`);
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tableConstraints.set('fk_studentclasslink_student', `
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ALTER TABLE studentClassLink
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ADD CONSTRAINT fk_studentclasslink_student
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FOREIGN KEY IF NOT EXISTS ( studentId )
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REFERENCES student( studentId )
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ON DELETE CASCADE
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ON UPDATE NO ACTION;
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`);
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tableConstraints.set('fk_studentclasslink_class', `
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ALTER TABLE studentClassLink
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ADD CONSTRAINT fk_studentclasslink_class
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FOREIGN KEY IF NOT EXISTS ( classId )
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REFERENCES class( classId )
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ON DELETE CASCADE
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ON UPDATE NO ACTION;
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`);
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tableConstraints.set('fk_studentclasslink_class', `
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ALTER TABLE studentParentLink
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ADD CONSTRAINT studentParentLink_fk0
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FOREIGN KEY IF NOT EXISTS ( studentid )
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REFERENCES student( studentId )
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ON DELETE CASCADE
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ON UPDATE NO ACTION;
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`);
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tableConstraints.set('studentParentLink_fk1', `
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ALTER TABLE studentParentLink
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ADD CONSTRAINT studentParentLink_fk1
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FOREIGN KEY IF NOT EXISTS ( parentId )
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REFERENCES parent( parentId )
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ON DELETE CASCADE
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ON UPDATE NO ACTION;
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`);
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tableConstraints.set('fk_test_account', `
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ALTER TABLE test
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ADD CONSTRAINT fk_test_account
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FOREIGN KEY IF NOT EXISTS ( classId )
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REFERENCES class( classId )
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ON DELETE RESTRICT
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ON UPDATE NO ACTION;
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`);
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tableConstraints.set('fk_test_testtemplate', `
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ALTER TABLE test
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ADD CONSTRAINT fk_test_testtemplate
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FOREIGN KEY IF NOT EXISTS ( testTemplateId )
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REFERENCES testTemplate( testTemplateId )
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ON DELETE NO ACTION
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ON UPDATE NO ACTION;
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`);
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tableConstraints.set('testResult_fk0', `
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ALTER TABLE testResult
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ADD CONSTRAINT testResult_fk0
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FOREIGN KEY IF NOT EXISTS ( studentId )
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REFERENCES student( studentId )
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ON DELETE CASCADE
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ON UPDATE NO ACTION;
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`);
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tableConstraints.set('fk_testresult_test', `
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ALTER TABLE testResult
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ADD CONSTRAINT fk_testresult_test
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FOREIGN KEY IF NOT EXISTS ( testId )
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REFERENCES test( testId )
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ON DELETE CASCADE
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ON UPDATE NO ACTION;
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`);
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tableConstraints.set('fk_testresult_account', `
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ALTER TABLE testResult
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ADD CONSTRAINT fk_testresult_account
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FOREIGN KEY IF NOT EXISTS ( accountId )
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REFERENCES account( accountId )
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ON DELETE NO ACTION
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ON UPDATE NO ACTION;
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`);
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tableConstraints.set('test_fk0', `
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ALTER TABLE testTemplate
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ADD CONSTRAINT test_fk0
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FOREIGN KEY IF NOT EXISTS ( accountId )
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REFERENCES account( accountId )
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ON DELETE NO ACTION
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ON UPDATE NO ACTION;
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`);
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async function initialise(dbOptions) {
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/*
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Initialises a database using the options object provided
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and applies schema to it
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Arguments:
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- database options object loaded in from
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config/db.json
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*/
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// Connect to the database
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const c = await mysql.createConnection(dbOptions);
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// Run the creation statment for each table
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for (const [ tableName, sql ] of tableCreate) {
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console.log(`Creating table ${tableName}`);
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try {
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await c.execute(sql);
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} catch (e) {
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console.error(e);
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throw new Error(`Unable to create table ${tableName}`);
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}
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}
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console.log('\n');
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// Run the creation statment for each constraint
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for (const [ fkName, sql ] of tableConstraints) {
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console.log(`Creating constraint ${fkName}`);
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try {
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await c.execute(sql);
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} catch (e) {
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console.error(e);
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throw new Error('Unable to create constraint ' +
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`${fkName}`);
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}
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}
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// Drop the database connection
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c.end();
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console.log('\nFinished initialising database');
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}
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// Import data from config/db.json
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let dbOptions;
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try {
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dbOptions = require(path.join(__dirname, '../../config/db.json'));
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console.log('DB config loaded\n');
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} catch {
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return console.error('Missing or malformed config ' +
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'(config/db.json)');
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}
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initialise(dbOptions);
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