Adds initial progress

source/Database/DatabaseUpdater.ts

@@ -0,0 +1,81 @@
+import {DatabaseConnection} from "./DatabaseConnection";
+import {DatabaseColumnDefinition, DatabaseDefinition} from "./DatabaseDefinition";
+import {Container} from "../Container/Container";
+import {Logger} from "log4js";
+
+export class DatabaseUpdater {
+    constructor(private readonly database: DatabaseConnection) {}
+    
+    public ensureAvaliablity(definitions: Iterable<DatabaseDefinition>) {
+        for (const definition of definitions) {
+            this.ensureDefinition(definition);
+        }
+    }
+    
+    private ensureDefinition(definition: DatabaseDefinition) {
+        if (this.database.hasTable(definition.name)) {
+            this.ensureTableColumns(definition);
+            return;
+        }
+        
+        this.createTable(definition);
+    }
+    
+    private ensureTableColumns(definition: DatabaseDefinition) {
+        const DBSQLColumns = this.database.fetchAll<{}, {name: string, type: string}>(
+            `PRAGMA table_info("${definition.name}")`
+        );
+        
+        if (!DBSQLColumns) {
+            Container.get<Logger>("logger").log("Request failed...");
+            return;
+        }
+        
+        const missingColumns = definition.columns.filter(
+            (column: DatabaseColumnDefinition) => {
+                return !DBSQLColumns.some((dbColumn: DatabaseColumnDefinition) => {
+                    return column.name === dbColumn.name
+                });
+            }
+        )
+        
+        if (missingColumns.length < 1) {
+            Container.get<Logger>("logger").log(`No new columns found for ${definition.name}`)
+            return;
+        }
+        
+        const columnsSQL = missingColumns.map((column: DatabaseColumnDefinition) => {
+            const values = [
+                "ADD",
+                column.name,
+                column.type,
+                column.primaryKey ? `PRIMARY KEY` : '',
+                column.notNull ? 'NOT NULL' : '',
+                column.autoIncrement ? 'AUTOINCREMENT' : '',
+            ]
+
+            return values.join(' ');
+        }).join(', ');
+        
+        const sql = `ALTER TABLE ${definition.name} ${columnsSQL}`;
+        this.database.execute(sql);
+    }
+
+
+    private createTable(definition: DatabaseDefinition) {
+        const columnsSQL = definition.columns.map((column: DatabaseColumnDefinition) => {
+            const values = [
+                column.name,
+                column.type,
+                column.primaryKey ? `PRIMARY KEY` : '',
+                column.notNull ? 'NOT NULL' : '',
+                column.autoIncrement ? 'AUTOINCREMENT' : '',
+            ]
+            
+            return values.join(' ');
+        }).join(', ');
+        
+        const sql = `CREATE TABLE IF NOT EXISTS ${definition.name} (${columnsSQL})`;
+        const result = this.database.execute(sql);
+    }
+}