Refactor suggestion handling and file indexing

- Updated the `shouldShowSuggestions` method in `suggestion.ts` to improve query handling by trimming and checking for closing brackets and max length against the trimmed name.
- Moved the logic for handling new or updated files in `file-indexer.ts` to ensure it checks for file existence before adding to the map, and added logic to remove files from the map if they no longer exist.
- Simplified the `getLinkFromPath` and `getLinkFromAlias` functions in `link-utils.ts` by directly using the mention type sign in regex checks, improving readability and maintainability.

src/editor/suggestion.ts

@@ -86,18 +86,19 @@ export class SuggestionProvider extends EditorSuggest<MentionSuggestion> {
 	 * Determine if suggestions should be shown based on various conditions
 	 */
 	private shouldShowSuggestions(query: string, signIndex: number, charsLeftOfCursor: string): boolean {
-		if (!query) {
+		const name = query?.substring(1).trim();
+		if (!name) {
 			return false;
 		}
 
 		// Check if query includes closing brackets
-		if (query.includes(']]')) {
+		if (name.includes(']]')) {
 			return false;
 		}
 
 		// Check if query exceeds max length
 		const maxMatchLength = this.settings.maxMatchLength ?? DEFAULT_SETTINGS.maxMatchLength;
-		if (maxMatchLength && query.length > maxMatchLength) {
+		if (maxMatchLength && name.length > maxMatchLength) {
 			return false;
 		}
 
@@ -105,7 +106,7 @@ export class SuggestionProvider extends EditorSuggest<MentionSuggestion> {
 		const stopCharacters = this.settings.stopCharacters ?? DEFAULT_SETTINGS.stopCharacters;
 		if (stopCharacters) {
 			for (const char of stopCharacters) {
-				if (query.includes(char)) {
+				if (name.includes(char)) {
 					return false;
 				}
 			}

src/mention/file-indexer.ts

@@ -60,15 +60,15 @@ export class FileIndexer {
 	updateIndex(path: string, originalPath?: string): boolean {
 		let needsUpdate = false;
 
-		// Handle new or updated file
-		const addItem = getLinkFromPath(path, this.settings);
-		if (addItem) {
-			this.addFileToMap(addItem);
-			needsUpdate = true;
-		}
-
 		const file = this.app.vault.getFileByPath(path);
 		if (file) {
+			// Handle new or updated file
+			const addItem = getLinkFromPath(path, this.settings);
+			if (addItem) {
+				this.addFileToMap(addItem);
+				needsUpdate = true;
+			}
+
 			const fileAliases: string[] = this.app.metadataCache.getFileCache(file)?.frontmatter?.aliases;
 			if (fileAliases) {
 				fileAliases.forEach(alias => {
@@ -79,6 +79,13 @@ export class FileIndexer {
 					}
 				});
 			}
+		} else {
+			// If the file doesn't exist, it might have been deleted
+			const removeItem = getLinkFromPath(path, this.settings);
+			if (removeItem) {
+				this.removeFileFromMap(removeItem);
+				needsUpdate = true;
+			}
 		}
 
 		// Handle renamed or deleted file

src/mention/link-utils.ts

@@ -13,22 +13,16 @@ export function getLinkFromPath(path: string, settings: MentionSettings): Mentio
 	}
 
 	for (const sign in settings.mentionTypes) {
-		const type = settings.mentionTypes[sign];
-
-		if (!type?.sign) {
+		if (!path.includes('/' + sign)) {
 			continue;
 		}
 
-		if (!path.includes('/' + type.sign)) {
-			continue;
-		}
-
-		const regex = new RegExp(`/(${type.sign}([^/]+))\\.md$`);
+		const regex = new RegExp(`/([${sign}]([^/]+))\\.md$`);
 		const result = regex.exec(path);
 
 		if (result?.[2]) {
 			return {
-				type: type,
+				type: settings.mentionTypes[sign],
 				name: result[2],
 				fileName: result[1],
 				path,
@@ -45,21 +39,19 @@ export function getLinkFromAlias(alias: string, file: TFile, settings: MentionSe
 	}
 
 	for (const sign in settings.mentionTypes) {
-		const type = settings.mentionTypes[sign];
-
-		if (!type?.sign || !alias.startsWith(type.sign)) {
+		if (!alias.startsWith(sign)) {
 			continue;
 		}
 
-		const aliasRegex = new RegExp(`${type.sign}([^/]+)$`);
+		const aliasRegex = new RegExp(`[${sign}]([^/]+)$`);
 		const aliasRegexResult = aliasRegex.exec(alias);
 
-		const fileNameRegex = new RegExp(`(${type.sign}([^/]+))\\.md$`);
+		const fileNameRegex = new RegExp(`([${sign}]([^/]+))\\.md$`);
 		const fileNameRegexResult = fileNameRegex.exec(file.name);
 
 		if (aliasRegexResult?.[1] && fileNameRegexResult?.[1]) {
 			return {
-				type: type,
+				type: settings.mentionTypes[sign],
 				name: aliasRegexResult[1],
 				fileName: fileNameRegexResult[1],
 				path: file.path,