feat(exporters): added migration comments and test

Author: igdmdimitrov

projects/igniteui-angular/migrations/common/UpdateChanges.ts

@@ -98,6 +98,18 @@ export class UpdateChanges {
         return this._tsFiles;
     }
 
+    private _ModuletTsFiles: string[] = [];
+    public get moduleTsFiles(): string[] {
+        if (!this._ModuletTsFiles.length) {
+            this.sourceDirsVisitor((fulPath, entry) => {
+                if (fulPath.endsWith('.module.ts')) {
+                    this._ModuletTsFiles.push(entry.path);
+                }
+            });
+        }
+        return this._ModuletTsFiles;
+    }
+
     private _sassFiles: string[] = [];
     /** Sass (both .scss and .sass) files in the project being updated. */
     public get sassFiles(): string[] {

projects/igniteui-angular/migrations/update-13_0_0/index.spec.ts

@@ -188,4 +188,68 @@ describe(`Update to ${version}`, () => {
 </div>
 `.replace(lineBreaksAndSpaceRegex, ''));
     });
+
+    it('should remove exporter services from module.ts files', async () => {
+        appTree.create('/testSrc/appPrefix/component/app.module.ts', `
+import { NgModule } from "@angular/core";
+import { FormsModule } from "@angular/forms";
+import { BrowserModule } from "@angular/platform-browser";
+import { BrowserAnimationsModule } from "@angular/platform-browser/animations";
+import { AppComponent } from "./app.component";
+import { IgxExcelExporterService } from "igniteui-angular";
+import { ExcelExportComponent } from "./services/export-excel/excel-export.component";
+
+@NgModule({
+bootstrap: [AppComponent],
+declarations: [
+    AppComponent,
+    ExcelExportComponent
+],
+imports: [
+    BrowserModule,
+    BrowserAnimationsModule,
+    FormsModule
+],
+providers: [IgxExcelExporterService],
+entryComponents: [],
+schemas: []
+})
+export class AppModule {}
+`);
+
+        const tree = await schematicRunner
+            .runSchematicAsync(migrationName, {}, appTree)
+            .toPromise();
+
+        expect(
+            tree.readContent('/testSrc/appPrefix/component/app.module.ts')
+        ).toEqual( `
+import { NgModule } from "@angular/core";
+import { FormsModule } from "@angular/forms";
+import { BrowserModule } from "@angular/platform-browser";
+import { BrowserAnimationsModule } from "@angular/platform-browser/animations";
+import { AppComponent } from "./app.component";
+// IgxExcelExporterService has been removed. Exporter services can now be used without providing.
+import { /*IgxExcelExporterService*/ } from "igniteui-angular";
+import { ExcelExportComponent } from "./services/export-excel/excel-export.component";
+
+@NgModule({
+bootstrap: [AppComponent],
+declarations: [
+    AppComponent,
+    ExcelExportComponent
+],
+imports: [
+    BrowserModule,
+    BrowserAnimationsModule,
+    FormsModule
+],
+// IgxExcelExporterService has been removed. Exporter services can now be used without providing.
+providers: [/*IgxExcelExporterService*/],
+entryComponents: [],
+schemas: []
+})
+export class AppModule {}
+`);
+    });
 });

projects/igniteui-angular/migrations/update-13_0_0/index.ts

@@ -16,6 +16,8 @@ export default (): Rule => (host: Tree, context: SchematicContext) => {
     const GRIDS = ['IgxGridComponent', 'IgxTreeGridComponent', 'IgxHierarchicalGridComponent'];
     const TAGS = ['igx-grid', 'igx-tree-grid', 'igx-hierarchical-grid'];
     const tsFiles = update.tsFiles;
+    const SERVICES = ['IgxCsvExporterService', 'IgxExcelExporterService'];
+    const moduleTsFiles = update.moduleTsFiles;
 
     for (const path of update.templateFiles) {
         findElementNodes(parseFile(host, path), TAGS)
@@ -61,5 +63,32 @@ export default (): Rule => (host: Tree, context: SchematicContext) => {
             }
         });
     }
+
+    for (const path of moduleTsFiles) {
+        let content = host.read(path)?.toString();
+        SERVICES.forEach(service => {
+            if (content.indexOf(service) > -1) {
+                const commentedService = '/*' + service + '*/';
+                content = content.replace(new RegExp(service, 'gi'), commentedService);
+                const indexes = getIndicesOf(commentedService, content);
+                indexes.reverse().forEach(index => {
+                    const preceedingContent = content.substring(0, index);
+                    const newLineIndex = preceedingContent.lastIndexOf('\n');
+                    const comment = '// ' + service + ' has been removed. Exporter services can now be used without providing.';
+                    if (newLineIndex > -1) {
+                        const newPreceedingContent =
+                            [preceedingContent.slice(0, newLineIndex), '\n' + comment, preceedingContent.slice(newLineIndex)].join('');
+                        content = content.replace(preceedingContent, newPreceedingContent);
+                    } else {
+                        // service is mentioned on the first row
+                        content = comment + '\n' + content;
+                    }
+                });
+
+                host.overwrite(path, content);
+            }
+        });
+    }
+
     update.applyChanges();
 };