WIP sketch emojiCandidatesMatching

Author: gnprice

lib/model/emoji.dart

@@ -84,7 +84,7 @@ mixin EmojiStore {
   /// indexed by [Reaction.emojiCode].
   Map<String, RealmEmojiItem> get realmEmoji;
 
-  Iterable<EmojiCandidate>? get emojiCandidates;
+  Iterable<EmojiCandidate> emojiCandidatesMatching(String query);
 }
 
 /// The implementation of [EmojiStore] that does the work.
@@ -93,15 +93,36 @@ mixin EmojiStore {
 /// itself.  Other code accesses this functionality through [PerAccountStore],
 /// or through the mixin [EmojiStore] which describes its interface.
 class EmojiStoreImpl with EmojiStore {
-  EmojiStoreImpl({required this.realmEmoji});
+  EmojiStoreImpl({required this.realmEmoji})
+    : _serverEmojiData = {}; // TODO start with a built-in list; TODO fetch to update
 
   @override
   Map<String, RealmEmojiItem> realmEmoji;
 
-  @override
-  List<EmojiCandidate>? emojiCandidates;
+  // ignore: prefer_final_fields
+  Map<String, List<String>> _serverEmojiData;
+
+  List<EmojiCandidate>? _allEmojiCandidates;
 
-  // Map<String, List<String>> _serverEmojiData;
+  @override
+  Iterable<EmojiCandidate> emojiCandidatesMatching(String query) {
+    if (query.isEmpty) {
+      return (_allEmojiCandidates ??= [
+        // TODO fix this logic for when realm emoji overrides Unicode emoji
+        for (final entry in _serverEmojiData.entries)
+          UnicodeEmojiCandidate(
+            emojiCode: entry.key,
+            emojiName: entry.value.first,
+            aliases: entry.value.length > 1 ? entry.value.sublist(1) : null,
+            emojiUnicode: tryParseEmojiCodeToUnicode(entry.key)!,
+          ),
+        for (final entry in realmEmoji.entries)
+          RealmEmojiCandidate(emojiCode: entry.key, emojiName: entry.value.name),
+        const ZulipExtraEmojiCandidate(),
+      ]);
+    }
+    throw UnimplementedError(); // TODO filter emoji candidates
+  }
 
   void handleRealmEmojiUpdateEvent(RealmEmojiUpdateEvent event) {
     realmEmoji = event.realmEmoji;

lib/model/store.dart

@@ -328,6 +328,9 @@ class PerAccountStore extends ChangeNotifier with EmojiStore, ChannelStore, Mess
 
   @override
   Map<String, RealmEmojiItem> get realmEmoji => _emoji.realmEmoji;
+  @override
+  Iterable<EmojiCandidate> emojiCandidatesMatching(String query) =>
+    _emoji.emojiCandidatesMatching(query);
   EmojiStoreImpl _emoji;
 
   ////////////////////////////////