initialize components, routes, and services

src/database/database-creator.ts

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+import * as path from 'path';
+import * as fs from 'fs';
+import {
+  SystemDef,
+  StorageDef,
+  ViewDef,
+  Order,
+  Filter,
+  TableDef,
+  ColumnDef,
+  BelongsToDef,
+  ManyToManyDef
+} from '../systemGenService';
+
+let outDir = 'test';
+
+export function createDatabase(storageDef: StorageDef) {
+  let tableCreationQueries: string[] = [];
+  let tableDeletionQueries: string[] = [];
+  for (let i in storageDef.tables) {
+    tableCreationQueries.push(getTableCreationString(storageDef.tables[i]));
+    tableDeletionQueries.push(getTableDeletionString(storageDef.tables[i]));
+  }
+  for (let i in storageDef.relations) {
+    tableCreationQueries.push(getTableRelationsCreationString(storageDef.relations[i]));
+    tableDeletionQueries.push(getTableRelationsDeletionString(storageDef.relations[i]))
+  }
+  tableCreationQueries.map((query: string) => {
+    console.log(query);
+  });
+
+  tableDeletionQueries.map((query: string) => {
+    console.log(query);
+  });
+
+  return {
+    up: tableCreationQueries,
+    down: tableDeletionQueries,
+  };
+}
+
+function getTableCreationString(tableDef: TableDef): string {
+  let primaryKeyString: string = `${tableDef.name}_id VARCHAR(36) PRIMARY KEY`;
+  let columnString: string = `${primaryKeyString}`;
+  let defaultColumns: string = `created DATETIME NOT NULL DEFAULT NOW(), modified DATETIME NOT NULL DEFAULT NOW()`
+  let indexString: string = ``;
+
+  // columns
+  for (let i in tableDef.columns) {
+    let column: ColumnDef = tableDef.columns[i];
+    columnString = `${columnString}, ${createColumnString(column)}`;
+  }
+
+  // relations
+  for (let i in tableDef.relations) {
+    let relation: BelongsToDef = tableDef.relations[i];
+    columnString = `${columnString}, ${relation.table}_id VARCHAR(36)`;
+  }
+
+  // default created & modified
+  columnString = `${columnString}, ${defaultColumns}`;
+
+  return `CREATE TABLE IF NOT EXISTS ${tableDef.name} (${columnString}${indexString !== '' ? ', ' + indexString : ''});`;
+}
+
+function getTableRelationsCreationString(relationsDef: ManyToManyDef): string {
+  let columnString: string = `${relationsDef.left}_id VARCHAR(36) NOT NULL, ${relationsDef.right}_id VARCHAR(36) NOT NULL`;
+  let indexString: string = `INDEX ${relationsDef.left}_id_index (${relationsDef.left}_id), INDEX ${relationsDef.right}_id_index (${relationsDef.right}_id)`;
+
+  if (relationsDef.columns && relationsDef.columns.length) {
+    for (let i in relationsDef.columns) {
+      let column: ColumnDef = relationsDef.columns[i];
+      columnString = `${columnString}, ${createColumnString(column)}`;
+    }
+  }
+
+  return `CREATE TABLE IF NOT EXISTS ${relationsDef.left}_${relationsDef.right} (${columnString}${indexString !== '' ? ', ' + indexString : ''});`;
+}
+
+function createColumnString(column: ColumnDef) {
+  const typeMap: {[type: string]: string} = {
+    "blob": "BLOB",
+    "boolean": "BOOLEAN",
+    "date": "DATE",
+    "dateTIME": "DATETIME",
+    "number": "INT",
+    "string": "VARCHAR(255)",
+  };
+
+  return `${column.name} ${typeMap[column.type]}${column.nullable ? '' : ' NOT NULL'}${column.default ? ' DEFAULT ' + column.default : ''}${column.autoIncrement ? ' AUTO_INCREMENT' : ''}${column.unique ? ' UNIQUE' : ''}`;
+}
+
+function getTableDeletionString(tableDef: TableDef): string {
+  return `DROP TABLE IF EXISTS ${tableDef.name};`
+}
+
+function getTableRelationsDeletionString(relationsDef: ManyToManyDef) : string {
+  return `DROP TABLE IF EXISTS ${relationsDef.left}_${relationsDef.right};`
+}
+
+function dateString() {
+  let date = new Date();
+  return `${date.getFullYear()}${date.getMonth() + 1}${date.getDate()}`;
+}
+
+export function writeMigrationsToFile(migrations: {up: string[], down: string[]}, outDir: string) {
+  let migrationFileContents = `
+--up
+${migrations.up.join('\n')}
+--down
+${migrations.down.join('\n')}
+  `;
+  let migrationFilePath = path.join(process.cwd(), outDir, 'src', 'migrationJobs', `${dateString()}-create-database.sql`);
+  fs.writeFileSync(migrationFilePath, migrationFileContents);
+}