refactor mfm extract (#7434)

* refactor extractCustomEmojisFromMfm()

* refactor extract-hashtags

* refactor extract-mentions

* refactor extract-hashtags

* refactor extract-url-from-mfm

* refactor extract-mentions

src/client/components/post-form.vue

@@ -61,7 +61,7 @@ import XNotePreview from './note-preview.vue';
 import * as mfm from 'mfm-js';
 import { host, url } from '@client/config';
 import { erase, unique } from '../../prelude/array';
-import extractMentions from '@/misc/extract-mentions';
+import { extractMentions } from '@/misc/extract-mentions';
 import getAcct from '@/misc/acct/render';
 import { formatTimeString } from '@/misc/format-time-string';
 import { Autocomplete } from '@client/scripts/autocomplete';

src/client/ui/chat/post-form.vue

@@ -56,7 +56,7 @@ import { toASCII } from 'punycode/';
 import * as mfm from 'mfm-js';
 import { host, url } from '@client/config';
 import { erase, unique } from '../../../prelude/array';
-import extractMentions from '@/misc/extract-mentions';
+import { extractMentions } from '@/misc/extract-mentions';
 import getAcct from '@/misc/acct/render';
 import { formatTimeString } from '@/misc/format-time-string';
 import { Autocomplete } from '@client/scripts/autocomplete';

src/misc/extract-custom-emojis-from-mfm.ts

@@ -2,17 +2,13 @@ import * as mfm from 'mfm-js';
 import { unique } from '@/prelude/array';
 
 export function extractCustomEmojisFromMfm(nodes: mfm.MfmNode[]): string[] {
-	const emojiNodes = [] as mfm.MfmEmojiCode[];
+	const emojis = [] as string[];
 
-	function scan(nodes: mfm.MfmNode[]) {
-		for (const node of nodes) {
-			if (node.type === 'emojiCode') emojiNodes.push(node);
-			else if (node.children) scan(node.children);
+	mfm.inspect(nodes, (node) => {
+		if (node.type === 'emojiCode' && node.props.name.length <= 100) {
+			emojis.push(node.props.name);
 		}
-	}
+	});
 
-	scan(nodes);
-
-	const emojis = emojiNodes.filter(x => x.props.name.length <= 100).map(x => x.props.name!);
 	return unique(emojis);
 }

src/misc/extract-hashtags.ts

@@ -1,18 +1,14 @@
 import * as mfm from 'mfm-js';
 import { unique } from '@/prelude/array';
 
-export default function(nodes: mfm.MfmNode[]): string[] {
-	const hashtagNodes = [] as mfm.MfmHashtag[];
+export function extractHashtags(nodes: mfm.MfmNode[]): string[] {
+	const hashtags = [] as string[];
 
-	function scan(nodes: mfm.MfmNode[]) {
-		for (const node of nodes) {
-			if (node.type === 'hashtag') hashtagNodes.push(node);
-			else if (node.children) scan(node.children);
+	mfm.inspect(nodes, (node) => {
+		if (node.type === 'hashtag') {
+			hashtags.push(node.props.hashtag);
 		}
-	}
+	});
 
-	scan(nodes);
-
-	const hashtags = hashtagNodes.map(x => x.props.hashtag);
 	return unique(hashtags);
 }

src/misc/extract-mentions.ts

@@ -2,18 +2,15 @@
 
 import * as mfm from 'mfm-js';
 
-export default function(nodes: mfm.MfmNode[]): mfm.MfmMention['props'][] {
+export function extractMentions(nodes: mfm.MfmNode[]): mfm.MfmMention['props'][] {
 	// TODO: 重複を削除
-	const mentionNodes = [] as mfm.MfmMention[];
+	const mentions = [] as mfm.MfmMention['props'][];
 
-	function scan(nodes: mfm.MfmNode[]) {
-		for (const node of nodes) {
-			if (node.type === 'mention') mentionNodes.push(node);
-			else if (node.children) scan(node.children);
+	mfm.inspect(nodes, (node) => {
+		if (node.type === 'mention') {
+			mentions.push(node.props);
 		}
-	}
+	});
 
-	scan(nodes);
-
-	return mentionNodes.map(x => x.props);
+	return mentions;
 }

src/misc/extract-url-from-mfm.ts

@@ -6,29 +6,21 @@ import { unique } from '@/prelude/array';
 const removeHash = (x: string) => x.replace(/#[^#]*$/, '');
 
 export function extractUrlFromMfm(nodes: mfm.MfmNode[], respectSilentFlag = true): string[] {
-	const urlNodes = [] as (mfm.MfmUrl | mfm.MfmLink)[];
+	let urls = [] as string[];
 
-	function scan(nodes: mfm.MfmNode[]) {
-		for (const node of nodes) {
-			if (node.type === 'url') {
-				urlNodes.push(node);
-			} else if (node.type === 'link') {
-				if (!respectSilentFlag || !node.props.silent) {
-					urlNodes.push(node);
-				}
-			} else if (node.children) {
-				scan(node.children);
-			}
+	mfm.inspect(nodes, (node) => {
+		if (node.type === 'url') {
+			urls.push(node.props.url);
+		} else if (node.type === 'link' && (!respectSilentFlag || !node.props.silent)) {
+			urls.push(node.props.url);
 		}
-	}
+	});
 
-	scan(nodes);
-
-	const urls = unique(urlNodes.map(x => x.props.url));
+	urls = unique(urls);
 
 	return urls.reduce((array, url) => {
-		const removed = removeHash(url);
-		if (!array.map(x => removeHash(x)).includes(removed)) array.push(url);
+		const urlWithoutHash = removeHash(url);
+		if (!array.map(x => removeHash(x)).includes(urlWithoutHash)) array.push(url);
 		return array;
 	}, [] as string[]);
 }

src/server/api/endpoints/i/update.ts

@@ -6,7 +6,7 @@ import acceptAllFollowRequests from '../../../../services/following/requests/acc
 import { publishToFollowers } from '../../../../services/i/update';
 import define from '../../define';
 import { extractCustomEmojisFromMfm } from '@/misc/extract-custom-emojis-from-mfm';
-import extractHashtags from '@/misc/extract-hashtags';
+import { extractHashtags } from '@/misc/extract-hashtags';
 import * as langmap from 'langmap';
 import { updateUsertags } from '../../../../services/update-hashtag';
 import { ApiError } from '../../error';

src/services/note/create.ts

@@ -12,9 +12,9 @@ import { updateHashtags } from '../update-hashtag';
 import { concat } from '../../prelude/array';
 import insertNoteUnread from './unread';
 import { registerOrFetchInstanceDoc } from '../register-or-fetch-instance-doc';
-import extractMentions from '@/misc/extract-mentions';
+import { extractMentions } from '@/misc/extract-mentions';
 import { extractCustomEmojisFromMfm } from '@/misc/extract-custom-emojis-from-mfm';
-import extractHashtags from '@/misc/extract-hashtags';
+import { extractHashtags } from '@/misc/extract-hashtags';
 import { Note, IMentionedRemoteUsers } from '../../models/entities/note';
 import { Mutings, Users, NoteWatchings, Notes, Instances, UserProfiles, Antennas, Followings, MutedNotes, Channels, ChannelFollowings } from '../../models';
 import { DriveFile } from '../../models/entities/drive-file';

test/extract-mentions.ts

@@ -1,6 +1,6 @@
 import * as assert from 'assert';
 
-import extractMentions from '../src/misc/extract-mentions';
+import { extractMentions } from '../src/misc/extract-mentions';
 import { parse } from 'mfm-js';
 
 describe('Extract mentions', () => {