[NEW] Reaction and emoji

Rocket.Chat/Controllers/Chat/MessagesComposerViewModel.swift

@@ -37,7 +37,7 @@ final class MessagesComposerViewModel {
     var replyMessageIdentifier = ""
     var messageToEdit: Message?
 
-    let hintPrefixes: [Character] = ["/", "#", "@", ":"]
+    let hintPrefixes: [Character] = ["/", "#", "@", ":", "+"]
 
     var hints: [Hint] = []
     var hintPrefixedWord: String = ""
@@ -56,6 +56,7 @@ final class MessagesComposerViewModel {
         }
 
         let word = String(word.dropFirst())
+        let subprefix = word.first
 
         if prefix == "@" {
             hints = User.search(
@@ -97,7 +98,7 @@ final class MessagesComposerViewModel {
             commands.forEach {
                 hints.append(.command($0))
             }
-        } else if prefix == ":" {
+        } else if prefix == ":" || (prefix == "+" && subprefix == ":") {
             let emojis = EmojiSearcher.standard.search(shortname: word.lowercased(), custom: CustomEmoji.emojis())
 
             emojis.forEach {

Rocket.Chat/Controllers/Chat/MessagesViewModel.swift

@@ -882,6 +882,12 @@ extension MessagesViewModel {
             }
 
             client.runCommand(command: command, params: params, roomId: subscription.rid)
+        } else if let lastMessage = subscription.roomLastMessage, let emoji = text.reaction() {
+            guard let client = API.current()?.client(MessagesClient.self) else {
+                return Alert.defaultError.present()
+            }
+
+            client.reactMessage(lastMessage, emoji: emoji)
         } else {
             guard let client = API.current()?.client(MessagesClient.self) else {
                 return Alert.defaultError.present()

Rocket.Chat/Extensions/StringExtensions.swift

@@ -138,6 +138,15 @@ extension String {
         return (command: command, params: params)
     }
 
+    func reaction() -> String? {
+        guard self.first == "+" && self.count > 1 else { return nil }
+
+        let emoji = String(self.dropFirst())
+        guard emoji.first == ":" && emoji.last == ":" else { return nil }
+
+        return emoji
+    }
+
     var boolValue: Bool {
         return NSString(string: self).boolValue
     }

Rocket.Chat/External/RCEmojiKit/EmojiSearcher.swift

@@ -19,6 +19,10 @@ open class EmojiSearcher {
 
     public func search(shortname: String, custom: [Emoji] = []) -> [EmojiSearchResult] {
         return (emojis + custom).compactMap { emoji -> EmojiSearchResult? in
+            if shortname.count == 0 {
+                return (emoji: emoji, suggestion: emoji.shortname)
+            }
+
             if let suggestion = emoji.shortname.contains(shortname) ? emoji.shortname : emoji.alternates.filter({ $0.contains(shortname) }).first {
                 return (emoji: emoji, suggestion: suggestion.contains(":") ? suggestion : ":\(suggestion):")
             }

Rocket.ChatTests/Extensions/StringExtensionSpec.swift

@@ -146,4 +146,23 @@ class StringExtensionSpec: XCTestCase {
 
         XCTAssertNil(string2.commandAndParams())
     }
+
+    func testReaction() {
+        let string = "+:upside_down:"
+
+        guard let emoji = string.reaction() else {
+            return XCTFail("string is valid reaction")
+        }
+
+        XCTAssertEqual(emoji, ":upside_down:")
+
+        let string2 = ":upside_down:"
+        XCTAssertNil(string2.reaction())
+
+        let string3 = "+upside_down:"
+        XCTAssertNil(string3.reaction())
+
+        let string4 = "+:upside_down"
+        XCTAssertNil(string4.reaction())
+    }
 }

Rocket.ChatTests/External/RCEmojiKit/EmojiSearcherSpec.swift

@@ -38,5 +38,12 @@ class EmojiSearcherSpec: XCTestCase {
         XCTAssert(search3.count == 1)
         XCTAssert(search3[0].emoji.shortname == ":thumbsup:")
         XCTAssert(search3[0].suggestion == ":+1:")
+
+        let search4 = searcher.search(shortname: "")
+        XCTAssert(search4.count == 4)
+        XCTAssert(search4[0].emoji.shortname == ":smiley:")
+        XCTAssert(search4[1].emoji.shortname == ":thumbsup:")
+        XCTAssert(search4[2].emoji.shortname == ":sunglasses:")
+        XCTAssert(search4[3].emoji.shortname == ":radioactive:")
     }
 }