refactor to allow switching ICategoryCollection context #40

src/application/Context/ApplicationContextProvider.ts

@@ -1,9 +1,32 @@
 import { ApplicationContext } from './ApplicationContext';
 import { IApplicationContext } from '@/application/Context/IApplicationContext';
-import applicationFile from 'js-yaml-loader!@/application/application.yaml';
-import { parseCategoryCollection } from '@/application/Parser/CategoryCollectionParser';
+import { OperatingSystem } from '@/domain/OperatingSystem';
+import { Environment } from '../Environment/Environment';
+import { IApplication } from '@/domain/IApplication';
+import { IEnvironment } from '../Environment/IEnvironment';
+import { parseApplication } from '../Parser/ApplicationParser';
 
-export function buildContext(): IApplicationContext {
-    const application = parseCategoryCollection(applicationFile);
-    return new ApplicationContext(application);
+export type ApplicationParserType = () => IApplication;
+const ApplicationParser: ApplicationParserType = parseApplication;
+
+export function buildContext(
+    parser = ApplicationParser,
+    environment = Environment.CurrentEnvironment): IApplicationContext {
+    const app = parser();
+    const os = getInitialOs(app, environment);
+    return new ApplicationContext(app, os);
+}
+
+function getInitialOs(app: IApplication, environment: IEnvironment): OperatingSystem {
+    const currentOs = environment.os;
+    const supportedOsList = app.getSupportedOsList();
+    if (supportedOsList.includes(currentOs)) {
+        return currentOs;
+    }
+    supportedOsList.sort((os1, os2) => {
+        const os1SupportLevel = app.collections[os1].totalScripts;
+        const os2SupportLevel = app.collections[os2].totalScripts;
+        return os1SupportLevel - os2SupportLevel;
+    });
+    return supportedOsList[0];
 }