working server with migrations as defined

BOOM BABY!!!

src/processDef.ts

@@ -1,21 +1,36 @@
 import * as path from 'path';
-import simmer from './simmer-def-example';
+// import simmer from './simmer-def-example';
 const ncp = require('ncp').ncp;
-// import defs from './example-def';
+import * as fs from 'fs';
+import defs from './example-def';
 
 declare var __dirname: any;
 
+let outDir = 'test';
+
 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 {
@@ -42,6 +57,10 @@ function getTableCreationString(tableDef: TableDef): string {
   return `CREATE TABLE IF NOT EXISTS ${tableDef.name} (${columnString}${indexString !== '' ? ', ' + indexString : ''});`;
 }
 
+function getTableDeletionString(tableDef: TableDef): string {
+  return `DROP TABLE IF EXISTS ${tableDef.name};`
+}
+
 function createColumnString(column: ColumnDef) {
   const typeMap: {[type: string]: string} = {
     "blob": "BLOB",
@@ -69,16 +88,38 @@ function getTableRelationsCreationString(relationsDef: ManyToManyDef): string {
   return `CREATE TABLE IF NOT EXISTS ${relationsDef.left}_${relationsDef.right} (${columnString}${indexString !== '' ? ', ' + indexString : ''});`;
 }
 
+function getTableRelationsDeletionString(relationsDef: ManyToManyDef) : string {
+  return `DROP TABLE IF EXISTS ${relationsDef.left}_${relationsDef.right};`
+}
 
-ncp(path.join(__dirname, 'frame'), path.join(__dirname, 'test'), (err: any) => {
+function dateString() {
+  let date = new Date();
+  return `${date.getFullYear()}${date.getMonth() + 1}${date.getDate()}`;
+}
+
+function writeMigrationsToFile(migrations: {up: string[], down: string[]}) {
+  let migrationFileContents = `
+--up
+${migrations.up.join('\n')}
+--down
+${migrations.down.join('\n')}
+  `;
+  let migrationFilePath = path.join(__dirname, outDir, 'src', 'migrationJobs', `${dateString()}-create-database.sql`);
+  fs.writeFileSync(migrationFilePath, migrationFileContents);
+}
+
+
+ncp(path.join(__dirname, 'frame'), path.join(__dirname, outDir), (err: any) => {
   if (err) {
     console.log(err);
   } else {
     console.log('success copying files');
+    let creationMigrations = createDatabase(defs.storage);
+    // let creationMigrations = createDatabase(simmer.storage);
+    writeMigrationsToFile(creationMigrations);
   }
 });
 
-createDatabase(simmer.storage);