From 5c37b9cef307bf795c4bc49dc7ab21de0c8ba97b Mon Sep 17 00:00:00 2001
From: syuilo <syuilotan@yahoo.co.jp>
Date: Fri, 8 Sep 2017 22:10:25 +0900
Subject: Implement #771

---
 src/tools/analysis/extract-user-domains.ts | 120 +++++++++++++++++++++++++++++
 1 file changed, 120 insertions(+)
 create mode 100644 src/tools/analysis/extract-user-domains.ts

(limited to 'src/tools')

diff --git a/src/tools/analysis/extract-user-domains.ts b/src/tools/analysis/extract-user-domains.ts
new file mode 100644
index 0000000000..bc120f5c17
--- /dev/null
+++ b/src/tools/analysis/extract-user-domains.ts
@@ -0,0 +1,120 @@
+import * as URL from 'url';
+
+import Post from '../../api/models/post';
+import User from '../../api/models/user';
+import parse from '../../api/common/text';
+
+process.on('unhandledRejection', console.dir);
+
+function tokenize(text: string) {
+	if (text == null) return [];
+
+	// パース
+	const ast = parse(text);
+
+	const domains = ast
+		// URLを抽出
+		.filter(t => t.type == 'url' || t.type == 'link')
+		.map(t => URL.parse(t.url).hostname);
+
+	return domains;
+}
+
+// Fetch all users
+User.find({}, {
+	fields: {
+		_id: true
+	}
+}).then(users => {
+	let i = -1;
+
+	const x = cb => {
+		if (++i == users.length) return cb();
+		extractDomainsOne(users[i]._id).then(() => x(cb), err => {
+			console.error(err);
+			setTimeout(() => {
+				i--;
+				x(cb);
+			}, 1000);
+		});
+	};
+
+	x(() => {
+		console.log('complete');
+	});
+});
+
+function extractDomainsOne(id) {
+	return new Promise(async (resolve, reject) => {
+		process.stdout.write(`extracting domains of ${id} ...`);
+
+		// Fetch recent posts
+		const recentPosts = await Post.find({
+			user_id: id,
+			text: {
+				$exists: true
+			}
+		}, {
+			sort: {
+				_id: -1
+			},
+			limit: 10000,
+			fields: {
+				_id: false,
+				text: true
+			}
+		});
+
+		// 投稿が少なかったら中断
+		if (recentPosts.length < 100) {
+			process.stdout.write(' >>> -\n');
+			return resolve();
+		}
+
+		const domains = {};
+
+		// Extract domains from recent posts
+		recentPosts.forEach(post => {
+			const domainsOfPost = tokenize(post.text);
+
+			domainsOfPost.forEach(domain => {
+				if (domains[domain]) {
+					domains[domain]++;
+				} else {
+					domains[domain] = 1;
+				}
+			});
+		});
+
+		// Calc peak
+		let peak = 0;
+		Object.keys(domains).forEach(domain => {
+			if (domains[domain] > peak) peak = domains[domain];
+		});
+
+		// Sort domains by frequency
+		const domainsSorted = Object.keys(domains).sort((a, b) => domains[b] - domains[a]);
+
+		// Lookup top 10 domains
+		const topDomains = domainsSorted.slice(0, 10);
+
+		process.stdout.write(' >>> ' + topDomains.join(', ') + '\n');
+
+		// Make domains object (includes weights)
+		const domainsObj = topDomains.map(domain => ({
+			domain: domain,
+			weight: domains[domain] / peak
+		}));
+
+		// Save
+		User.update({ _id: id }, {
+			$set: {
+				domains: domainsObj
+			}
+		}).then(() => {
+			resolve();
+		}, err => {
+			reject(err);
+		});
+	});
+}
-- 
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