Add handling for emoji letters

Resolves discussion in #78
ajayyy · Jul 20, 2023 · 64996f0 · 64996f0
1 parent 570d831
commit 64996f0
Show file tree

Hide file tree

Showing 2 changed files with 17 additions and 4 deletions.
diff --git a/src/titles/titleFormatter.ts b/src/titles/titleFormatter.ts
@@ -220,6 +220,11 @@ function isAllCaps(word: string): boolean {
 export function capitalizeFirstLetter(word: string): string {
     const result: string[] = [];
 
+    if (startsWithEmojiLetter(word)) {
+        // Emoji letter is already "capitalized"
+        return word.toLowerCase();
+    }
+
     for (const char of word) {
         if (char.match(/[\p{L}]/u)) {
             // converts to an array in order to slice by Unicode code points
@@ -238,6 +243,10 @@ function isWordCapitalCase(word: string): boolean {
     return !!word.match(/^[^\p{L}]*[\p{Lu}][^\p{Lu}]+$/u);
 }
 
+function startsWithEmojiLetter(word: string): boolean {
+    return !!word.match(/^[^\p{L}]*[🅰🆎🅱🆑🅾][^\p{Lu}]+$/u);
+}
+
 /**
  * Not just capital at start
  */
@@ -377,9 +386,9 @@ export function cleanPunctuation(title: string): string {
 
 export function cleanEmojis(title: string): string {
     const cleaned = title
-        .replace(/ \p{Extended_Pictographic}+(?= )/ug, "") // Clear extra spaces between emoji "words"
-        .replace(/(\S)\p{Extended_Pictographic}(\S)/ug, "$1 $2") // Emojis in between letters should be spaces
-        .replace(/\p{Extended_Pictographic}/ug, "")
+        .replace(/ ((?=\p{Extended_Pictographic})(?=[^🅰🆎🅱🆑🅾])\S)+(?= )/ug, "") // Clear extra spaces between emoji "words"
+        .replace(/(\S)(?=\p{Extended_Pictographic})(?=[^🅰🆎🅱🆑🅾])\S(\S)/ug, "$1 $2") // Emojis in between letters should be spaces
+        .replace(/(?=\p{Extended_Pictographic})(?=[^🅰🆎🅱🆑🅾])\S/ug, "")
         .trim();
 
     if (cleaned.length > 0) {

diff --git a/test/titleFormatter.test.ts b/test/titleFormatter.test.ts
@@ -136,7 +136,11 @@ describe("toTitleCase cleanEmojis", () => {
         ["5 Minute Timer [MOUSE 🐭 MAZE] 🐭", "5 Minute Timer [Mouse Maze]"],
         ["5 min countdown timer (roller coaster) 🎢", "5 Min Countdown Timer (Roller Coaster)"],
         ["5 min countdown timer (roller🎢coaster) 🎢", "5 Min Countdown Timer (Roller Coaster)"],
-        [" 🎢  🎢🎢 🎢🎢\t🎢", "🎢 🎢🎢 🎢🎢\t🎢"] // Leave emojis when there is no text
+        [" 🎢  🎢🎢 🎢🎢\t🎢", "🎢 🎢🎢 🎢🎢\t🎢"], // Leave emojis when there is no text
+        ["Rush 🅱️", "Rush 🅱️"],
+        ["5 min countdown timer (roller🎢🅱️oaster) 🎢", "5 Min Countdown Timer (Roller 🅱️oaster)"],
+        ["5 min countdown 🎢🅱️🎢🎢 timer (roller coaster) 🎢", "5 Min Countdown 🅱️ Timer (Roller Coaster)"],
+        ["🎢🅱️🎢🎢 5 min countdown timer (roller coaster) 🎢", "🅱️ 5 Min Countdown Timer (Roller Coaster)"],
     ];
     for (const testCase of titleCases) {
         const [input, expected] = testCase;