From b3f42e62af698a67c2250533c437569559f1fdf9 Mon Sep 17 00:00:00 2001
From: syuilo <syuilotan@yahoo.co.jp>
Date: Thu, 29 Dec 2016 07:49:51 +0900
Subject: Initial commit :four_leaf_clover:

---
 src/common/text/elements/bold.js    | 17 ++++++++++
 src/common/text/elements/hashtag.js | 23 +++++++++++++
 src/common/text/elements/mention.js | 17 ++++++++++
 src/common/text/elements/url.js     | 16 +++++++++
 src/common/text/index.js            | 67 +++++++++++++++++++++++++++++++++++++
 5 files changed, 140 insertions(+)
 create mode 100644 src/common/text/elements/bold.js
 create mode 100644 src/common/text/elements/hashtag.js
 create mode 100644 src/common/text/elements/mention.js
 create mode 100644 src/common/text/elements/url.js
 create mode 100644 src/common/text/index.js

(limited to 'src/common')

diff --git a/src/common/text/elements/bold.js b/src/common/text/elements/bold.js
new file mode 100644
index 0000000000..41a01399dd
--- /dev/null
+++ b/src/common/text/elements/bold.js
@@ -0,0 +1,17 @@
+/**
+ * Bold
+ */
+
+const regexp = /\*\*(.+?)\*\*/;
+
+module.exports = {
+	test: x => new RegExp('^' + regexp.source).test(x),
+	parse: text => {
+		const bold = text.match(new RegExp('^' + regexp.source))[0];
+		return {
+			type: 'bold',
+			content: bold,
+			bold: bold.substr(2, bold.length - 4)
+		};
+	}
+};
diff --git a/src/common/text/elements/hashtag.js b/src/common/text/elements/hashtag.js
new file mode 100644
index 0000000000..f04b782007
--- /dev/null
+++ b/src/common/text/elements/hashtag.js
@@ -0,0 +1,23 @@
+/**
+ * Hashtag
+ */
+
+module.exports = {
+	test: (x, i) =>
+		/^\s#[^\s]+/.test(x) || (i == 0 && /^#[^\s]+/.test(x))
+	,
+	parse: text => {
+		const isHead = text[0] == '#';
+		const hashtag = text.match(/^\s?#[^\s]+/)[0];
+		const res = !isHead ? [{
+			type: 'text',
+			content: text[0]
+		}] : [];
+		res.push({
+			type: 'hashtag',
+			content: isHead ? hashtag : hashtag.substr(1),
+			hashtag: isHead ? hashtag.substr(1) : hashtag.substr(2)
+		});
+		return res;
+	}
+};
diff --git a/src/common/text/elements/mention.js b/src/common/text/elements/mention.js
new file mode 100644
index 0000000000..b58786fd1e
--- /dev/null
+++ b/src/common/text/elements/mention.js
@@ -0,0 +1,17 @@
+/**
+ * Mention
+ */
+
+const regexp = /@[a-zA-Z0-9\-]+/;
+
+module.exports = {
+	test: x => new RegExp('^' + regexp.source).test(x),
+	parse: text => {
+		const mention = text.match(new RegExp('^' + regexp.source))[0];
+		return {
+			type: 'mention',
+			content: mention,
+			username: mention.substr(1)
+		};
+	}
+};
diff --git a/src/common/text/elements/url.js b/src/common/text/elements/url.js
new file mode 100644
index 0000000000..d02aef0800
--- /dev/null
+++ b/src/common/text/elements/url.js
@@ -0,0 +1,16 @@
+/**
+ * URL
+ */
+
+const regexp = /https?:\/\/[\w\/:%#@\$&\?!\(\)\[\]~\.=\+\-]+/;
+
+module.exports = {
+	test: x => new RegExp('^' + regexp.source).test(x),
+	parse: text => {
+		const link = text.match(new RegExp('^' + regexp.source))[0];
+		return {
+			type: 'link',
+			content: link
+		};
+	}
+};
diff --git a/src/common/text/index.js b/src/common/text/index.js
new file mode 100644
index 0000000000..973e7c5236
--- /dev/null
+++ b/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;
-- 
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