Fix reaction notification title to be consistent with ReactionView

Changelog-Fixed: Fix reaction notification title to be consistent with ReactionView
Closes: #1137

damus/Models/HomeModel.swift

@@ -1202,7 +1202,7 @@ func create_local_notification(profiles: Profiles, notify: LocalNotification) {
         title = String(format: NSLocalizedString("Reposted by %@", comment: "Reposted by heading in local notification"), displayName)
         identifier = "myBoostNotification"
     case .like:
-        title = String(format: NSLocalizedString("%@ reacted with %@", comment: "Reacted by heading in local notification"), displayName, notify.event.content)
+        title = String(format: NSLocalizedString("%@ reacted with %@", comment: "Reacted by heading in local notification"), displayName, to_reaction_emoji(ev: notify.event) ?? "")
         identifier = "myLikeNotification"
     case .dm:
         title = displayName

damus/Nostr/NostrEvent.swift

@@ -492,11 +492,11 @@ func make_boost_event(pubkey: String, privkey: String, boosted: NostrEvent) -> N
     return ev
 }
 
-func make_like_event(pubkey: String, privkey: String, liked: NostrEvent) -> NostrEvent {
+func make_like_event(pubkey: String, privkey: String, liked: NostrEvent, content: String = "🤙") -> NostrEvent {
     var tags: [[String]] = liked.tags.filter { tag in tag.count >= 2 && (tag[0] == "e" || tag[0] == "p") }
     tags.append(["e", liked.id])
     tags.append(["p", liked.pubkey])
-    let ev = NostrEvent(content: "🤙", pubkey: pubkey, kind: 7, tags: tags)
+    let ev = NostrEvent(content: content, pubkey: pubkey, kind: 7, tags: tags)
     ev.calculate_id()
     ev.sign(privkey: privkey)
 
@@ -966,6 +966,28 @@ func first_eref_mention(ev: NostrEvent, privkey: String?) -> Mention? {
     return nil
 }
 
+/**
+ Transforms a `NostrEvent` of known kind `NostrKind.like`to a human-readable emoji.
+ If the known kind is not a `NostrKind.like`, it will return `nil`.
+ If the event content is an empty string or `+`, it will map that to a heart ❤️ emoji.
+ If the event content is a "-", it will map that to a dislike 👎 emoji.
+ Otherwise, it will return the event content at face value without transforming it.
+ */
+func to_reaction_emoji(ev: NostrEvent) -> String? {
+    guard ev.known_kind == NostrKind.like else {
+        return nil
+    }
+
+    switch ev.content {
+    case "", "+":
+        return "❤️"
+    case "-":
+        return "👎"
+    default:
+        return ev.content
+    }
+}
+
 extension [ReferencedId] {
     var pRefs: [ReferencedId] {
         get {

damus/Views/Reactions/ReactionView.swift

@@ -12,10 +12,7 @@ struct ReactionView: View {
     let reaction: NostrEvent
     
     var content: String {
-        if reaction.content == "" || reaction.content == "+" {
-            return "❤️"
-        }
-        return reaction.content
+        return to_reaction_emoji(ev: reaction) ?? ""
     }
     
     var body: some View {

damusTests/LikeTests.swift

@@ -32,4 +32,26 @@ class LikeTests: XCTestCase {
         XCTAssertEqual(like_ev.last_refid()!.ref_id, id)
     }
 
+    func testToReactionEmoji() {
+        let privkey = "0fc2092231f958f8d57d66f5e238bb45b6a2571f44c0ce024bbc6f3a9c8a15fe"
+        let pubkey  = "30c6d1dc7f7c156794fa15055e651b758a61b99f50fcf759de59386050bf6ae2"
+        let liked = NostrEvent(content: "awesome #[0] post", pubkey: "orig_pk", tags: [["p", "cindy"], ["e", "bob"]])
+        liked.calculate_id()
+        let id = liked.id
+
+        let emptyReaction = make_like_event(pubkey: pubkey, privkey: privkey, liked: liked, content: "")
+        let plusReaction = make_like_event(pubkey: pubkey, privkey: privkey, liked: liked, content: "+")
+        let minusReaction = make_like_event(pubkey: pubkey, privkey: privkey, liked: liked, content: "-")
+        let heartReaction = make_like_event(pubkey: pubkey, privkey: privkey, liked: liked, content: "❤️")
+        let thumbsUpReaction = make_like_event(pubkey: pubkey, privkey: privkey, liked: liked, content: "👍")
+        let shakaReaction = make_like_event(pubkey: pubkey, privkey: privkey, liked: liked, content: "🤙")
+
+        XCTAssertEqual(to_reaction_emoji(ev: emptyReaction), "❤️")
+        XCTAssertEqual(to_reaction_emoji(ev: plusReaction), "❤️")
+        XCTAssertEqual(to_reaction_emoji(ev: minusReaction), "👎")
+        XCTAssertEqual(to_reaction_emoji(ev: heartReaction), "❤️")
+        XCTAssertEqual(to_reaction_emoji(ev: thumbsUpReaction), "👍")
+        XCTAssertEqual(to_reaction_emoji(ev: shakaReaction), "🤙")
+    }
+
 }