chore(paginator): add theme import migration

Author: hanastasov

projects/igniteui-angular/migrations/update-8_2_6/index.spec.ts

@@ -67,7 +67,9 @@ describe('Update 8.2.6', () => {
     it('should update igx-grid-paginator-theme', done => {
         appTree.create(
             '/testSrc/appPrefix/component/test.component.scss',
-            `$dark-grid-paginator: igx-grid-paginator-theme($color: black);
+            `@import '~igniteui-angular/lib/core/styles/components/grid-paginator/grid-paginator-component';
+            @import '~igniteui-angular/lib/core/styles/components/grid-paginator/grid-paginator-theme';
+            $dark-grid-paginator: igx-grid-paginator-theme($color: black);
             @include igx-grid-paginator($dark-grid-paginator);
             .igx-grid-paginator__pager {
                 @include igx-button($dark-button);
@@ -77,7 +79,9 @@ describe('Update 8.2.6', () => {
         const tree = schematicRunner.runSchematic('migration-12', {}, appTree);
         expect(tree.readContent('/testSrc/appPrefix/component/test.component.scss'))
         .toEqual(
-            `$dark-grid-paginator: igx-paginator-theme($color: black);
+            `@import '~igniteui-angular/lib/core/styles/components/paginator/paginator-component';
+            @import '~igniteui-angular/lib/core/styles/components/paginator/paginator-theme';
+            $dark-grid-paginator: igx-paginator-theme($color: black);
             @include igx-paginator($dark-grid-paginator);
             .igx-grid-paginator__pager {
                 @include igx-button($dark-button);

projects/igniteui-angular/migrations/update-8_2_6/index.ts

@@ -29,11 +29,17 @@ export default function(): Rule {
         '$_square-shape-pagination'];
 
         let globalStyleExt: string;
+        const gridPaginatorComponentImport = '~igniteui-angular/lib/core/styles/components/grid-paginator/grid-paginator-component';
+        const gridPaginatorThemeImport = '~igniteui-angular/lib/core/styles/components/grid-paginator/grid-paginator-theme';
+        const paginatorComponentImport = '~igniteui-angular/lib/core/styles/components/paginator/paginator-component';
+        const paginatorThemeImport = '~igniteui-angular/lib/core/styles/components/paginator/paginator-theme';
         const config = getWorkspace(host);
         const projects = getProjects(config);
 
         context.logger.info(`Applying migration for Ignite UI for Angular to version ${version}`);
 
+        const update = new UpdateChanges(__dirname, host, context);
+
         if (config.schematics && config.schematics['@schematics/angular:component']) {
             // updated projects have global prefix rather than per-project:
             globalStyleExt = config.schematics['@schematics/angular:component'].styleext;
@@ -56,12 +62,19 @@ export default function(): Rule {
                             content = content.split(n).join(newThemes[i]);
                         }
                     });
+                    if (content.indexOf(gridPaginatorComponentImport) !== -1) {
+                        content = content.replace(gridPaginatorComponentImport, paginatorComponentImport);
+                        host.overwrite(path, content);
+                    }
+                    if (content.indexOf(gridPaginatorThemeImport) !== -1) {
+                        content = content.replace(gridPaginatorThemeImport, paginatorThemeImport);
+                        host.overwrite(path, content);
+                    }
                     host.overwrite(path, content);
                 }
             });
         }
 
-        const update = new UpdateChanges(__dirname, host, context);
         update.applyChanges();
     };
 }