Add promotion static data, prepare for #6.

Refactor static data source to support different query in one class.

lib/CustomImageSearchPage.dart

@@ -10,7 +10,7 @@ class CustomImageSearchDemo extends StatefulWidget {
 
 class _CustomImageSearchDemoState extends State<CustomImageSearchDemo> {
   final CustomSearchSearchDelegate _delegate =
-      CustomSearchSearchDelegate.fakeStaticImageSearchSource();
+  CustomSearchSearchDelegate.fakeStaticSource();
 
 //  final CustomSearchSearchDelegate _delegate =
 //      new CustomSearchSearchDelegate.imageSearch(

lib/CustomWebSearchPage.dart

@@ -9,7 +9,7 @@ class CustomWebSearchDemo extends StatefulWidget {
 
 class _CustomWebSearchDemoState extends State<CustomWebSearchDemo> {
   final CustomSearchSearchDelegate _delegate = CustomSearchSearchDelegate
-      .fakeStaticWebSearchSource();
+      .fakeStaticSource();
 
 //  final CustomSearchSearchDelegate _delegate = new CustomSearchSearchDelegate(
 //      dataSource: CustomSearchDataSource(cx: '', apiKey: ''),

lib/search_data_source.dart

@@ -54,36 +54,51 @@ abstract class SearchDataSource {
   Future<List<SearchResult>> search(String query, {String searchType});
 }
 
-class FakeSearchDataSource implements SearchDataSource {
-  String jsonString;
-  static const String _webSearchAssetPath =
-      'res/sampledata/nytimes_sample_data.json';
-  static const String _imageSearchAssetPath =
-      'res/sampledata/nytimes_image_sample_data.json';
+class _StaticSearchResponse {
+  final String assetPath;
+  final String searchType;
+  String searchResponseJsonString;
 
-  FakeSearchDataSource({this.jsonString});
+  _StaticSearchResponse(
+      {this.assetPath, this.searchType, this.searchResponseJsonString});
+}
 
-  FakeSearchDataSource.loadWebSearchResultFromAsset() {
-    this._initFromAsset(_webSearchAssetPath);
-  }
 
-  FakeSearchDataSource.loadImageSearchResultFromAsset() {
-    this._initFromAsset(_imageSearchAssetPath);
-  }
+class FakeSearchDataSource implements SearchDataSource {
 
-  void _initFromAsset(String assetPath) {
-    loadAsset(assetPath).then((loadedStr) => this.jsonString = loadedStr);
+  final Map<String, _StaticSearchResponse> searchResponses = {
+    'web': _StaticSearchResponse(
+        assetPath: 'res/sampledata/nytimes_sample_data.json'),
+    'image': _StaticSearchResponse(
+        assetPath: 'res/sampledata/nytimes_sample_data.json',
+        searchType: 'image'),
+    'promotion': _StaticSearchResponse(
+        assetPath: 'res/sampledata/nytimes_with_promotion.json'),
+  };
+
+
+  FakeSearchDataSource() {
+    searchResponses.keys.forEach((key) {
+      loadAssetToSearchResponse(key, searchResponses[key].assetPath);
+    });
   }
 
-  Future<String> loadAsset(String assetPath) async {
-    return await rootBundle.loadString(assetPath);
+  void loadAssetToSearchResponse(String searchKey, String assetPath) async {
+    searchResponses[searchKey].searchResponseJsonString =
+    await rootBundle.loadString(assetPath);
   }
 
   @override
   Future<List<SearchResult>> search(String query, {String searchType}) async {
-    Map searchMap = jsonDecode(jsonString);
-    customsearch.Search search = customsearch.Search.fromJson(searchMap);
     var results = List<SearchResult>();
+    if (!searchResponses.containsKey(query)) {
+      return results;
+    }
+    if (searchResponses[query].searchType != searchType) {
+      return results;
+    }
+    Map searchMap = jsonDecode(searchResponses[query].searchResponseJsonString);
+    customsearch.Search search = customsearch.Search.fromJson(searchMap);
     search.items.forEach(
             (item) => results.add(SearchResult.escapeLineBreakInSnippet(item)));
     return Set<SearchResult>.from(results).toList();

lib/search_result_page.dart

@@ -42,10 +42,13 @@ class WebSearchResultCard extends StatelessWidget {
   Widget _generateTitleTile(BuildContext context) {
     final ThemeData theme = Theme.of(context);
     return ListTile(
-      title: Text(
-        this.searchResult.result.title,
-        style: theme.textTheme.headline.copyWith(
-            fontSize: 15.0, fontWeight: FontWeight.bold, color: Colors.blue),
+      title: Padding(
+        padding: EdgeInsets.only(top: 6.0),
+        child: Text(
+          this.searchResult.result.title,
+          style: theme.textTheme.headline.copyWith(
+              fontSize: 15.0, fontWeight: FontWeight.bold, color: Colors.blue),
+        ),
       ),
       subtitle: new Text(
         this.searchResult.result.link,
@@ -57,26 +60,41 @@ class WebSearchResultCard extends StatelessWidget {
 
   Widget _generateBodyTile(BuildContext context) {
     final ThemeData theme = Theme.of(context);
-    return new Container(
-      padding: const EdgeInsets.only(
-        left: 15.0,
-        bottom: 8.0,
-      ),
-      child: new Row(children: [
-        this.searchResult.result.pagemap['thumbnail'] != null
-            ? new Image.network(
-            this.searchResult.result.pagemap['thumbnail'][0]['src'])
-            : null,
-        Expanded(
-            child: Container(
-                padding: const EdgeInsets.only(left: 10.0, right: 12.0),
-                child: Text(
-                  this.searchResult.result.snippet,
-                  style: theme.textTheme.body1,
-                  textAlign: TextAlign.left,
-                ))),
-      ]),
-    );
+    bool haveThumbnail = this.searchResult.result.pagemap['thumbnail'] != null;
+    if (!haveThumbnail) {
+      return Container(
+        padding: const EdgeInsets.only(
+          left: 14.0,
+          bottom: 8.0,
+        ),
+        child: Container(
+            padding: const EdgeInsets.only(right: 6.0),
+            child: Text(
+              this.searchResult.result.snippet,
+              style: theme.textTheme.body1,
+              textAlign: TextAlign.left,
+            )),
+      );
+    } else {
+      return Container(
+        padding: const EdgeInsets.only(
+          left: 15.0,
+          bottom: 8.0,
+        ),
+        child: new Row(children: [
+          Image.network(
+              this.searchResult.result.pagemap['thumbnail'][0]['src']),
+          Expanded(
+              child: Container(
+                  padding: const EdgeInsets.only(left: 10.0, right: 12.0),
+                  child: Text(
+                    this.searchResult.result.snippet,
+                    style: theme.textTheme.body1,
+                    textAlign: TextAlign.left,
+                  ))),
+        ]),
+      );
+    }
   }
 
   Widget _buildSimpleLayout(BuildContext context) {
@@ -163,18 +181,11 @@ class CustomSearchSearchDelegate extends SearchDelegate<SearchResult> {
         this.autoCompleteDataSource,
         this.searchType = SearchType.image});
 
-  CustomSearchSearchDelegate.fakeStaticWebSearchSource() {
-    this.dataSource = FakeSearchDataSource.loadWebSearchResultFromAsset();
+  CustomSearchSearchDelegate.fakeStaticSource() {
+    this.dataSource = FakeSearchDataSource();
     this.autoCompleteDataSource = CommonEnglishWordAutoCompleteDataSource();
     this.searchType = SearchType.web;
   }
-
-  CustomSearchSearchDelegate.fakeStaticImageSearchSource() {
-    this.dataSource = FakeSearchDataSource.loadImageSearchResultFromAsset();
-    this.autoCompleteDataSource = CommonEnglishWordAutoCompleteDataSource();
-    this.searchType = SearchType.image;
-  }
-
   @override
   ThemeData appBarTheme(BuildContext context) {
     final ThemeData theme = Theme.of(context);
@@ -269,6 +280,7 @@ class CustomSearchSearchDelegate extends SearchDelegate<SearchResult> {
                           searchDelegate: this);
                     }));
               case SearchType.web:
+                print(snapshot.data.length);
                 return ListView.builder(
                     itemCount: snapshot.data.length,
                     itemBuilder: (BuildContext context, int index) {