Initial commit 🍀

src/common/text/index.js

@@ -0,0 +1,67 @@
+/**
+ * Misskey Text Analyzer
+ */
+
+const elements = [
+	require('./elements/bold'),
+	require('./elements/url'),
+	require('./elements/mention'),
+	require('./elements/hashtag')
+];
+
+function analyze(source) {
+
+	if (source == '') {
+		return null;
+	}
+
+	const tokens = [];
+
+	function push(token) {
+		if (token != null) {
+			tokens.push(token);
+			source = source.substr(token.content.length);
+		}
+	}
+
+	let i = 0;
+
+	// パース
+	while (source != '') {
+		const parsed = elements.some(el => {
+			if (el.test(source, i)) {
+				let tokens = el.parse(source);
+				if (!Array.isArray(tokens)) {
+					tokens = [tokens];
+				}
+				tokens.forEach(push);
+				return true;
+			}
+		});
+
+		if (!parsed) {
+			push({
+				type: 'text',
+				content: source[0]
+			});
+		}
+
+		i++;
+	}
+
+	// テキストを纏める
+	tokens[0] = [tokens[0]];
+	return tokens.reduce((a, b) => {
+		if (a[a.length - 1].type == 'text' && b.type == 'text') {
+			const tail = a.pop();
+			return a.concat({
+				type: 'text',
+				content: tail.content + b.content
+			});
+		} else {
+			return a.concat(b);
+		}
+	});
+}
+
+module.exports = analyze;