wip

src/api/endpoints/posts/search.ts

@@ -0,0 +1,123 @@
+'use strict';
+
+/**
+ * Module dependencies
+ */
+import * as mongo from 'mongodb';
+import it from '../../it';
+const escapeRegexp = require('escape-regexp');
+import Post from '../../models/post';
+import serialize from '../../serializers/post';
+import config from '../../../conf';
+
+/**
+ * Search a post
+ *
+ * @param {any} params
+ * @param {any} me
+ * @return {Promise<any>}
+ */
+module.exports = (params, me) =>
+	new Promise(async (res, rej) =>
+{
+	// Get 'query' parameter
+	const [query, queryError] = it(params.query).expect.string().required().trim().validate(x => x != '').qed();
+	if (queryError) return rej('invalid query param');
+
+	// Get 'offset' parameter
+	const [offset, offsetErr] = it(params.offset).expect.number().min(0).default(0).qed();
+	if (offsetErr) return rej('invalid offset param');
+
+	// Get 'max' parameter
+	const [max, maxErr] = it(params.max).expect.number().range(1, 30).default(10).qed();
+	if (maxErr) return rej('invalid max param');
+
+	// If Elasticsearch is available, search by it
+	// If not, search by MongoDB
+	(config.elasticsearch.enable ? byElasticsearch : byNative)
+		(res, rej, me, query, offset, max);
+});
+
+// Search by MongoDB
+async function byNative(res, rej, me, query, offset, max) {
+	const escapedQuery = escapeRegexp(query);
+
+	// Search posts
+	const posts = await Post
+		.find({
+			text: new RegExp(escapedQuery)
+		}, {
+			sort: {
+				_id: -1
+			},
+			limit: max,
+			skip: offset
+		});
+
+	// Serialize
+	res(await Promise.all(posts.map(async post =>
+		await serialize(post, me))));
+}
+
+// Search by Elasticsearch
+async function byElasticsearch(res, rej, me, query, offset, max) {
+	const es = require('../../db/elasticsearch');
+
+	es.search({
+		index: 'misskey',
+		type: 'post',
+		body: {
+			size: max,
+			from: offset,
+			query: {
+				simple_query_string: {
+					fields: ['text'],
+					query: query,
+					default_operator: 'and'
+				}
+			},
+			sort: [
+				{ _doc: 'desc' }
+			],
+			highlight: {
+				pre_tags: ['<mark>'],
+				post_tags: ['</mark>'],
+				encoder: 'html',
+				fields: {
+					text: {}
+				}
+			}
+		}
+	}, async (error, response) => {
+		if (error) {
+			console.error(error);
+			return res(500);
+		}
+
+		if (response.hits.total === 0) {
+			return res([]);
+		}
+
+		const hits = response.hits.hits.map(hit => new mongo.ObjectID(hit._id));
+
+		// Fetch found posts
+		const posts = await Post
+			.find({
+				_id: {
+					$in: hits
+				}
+			}, {
+				sort: {
+					_id: -1
+				}
+			});
+
+		posts.map(post => {
+			post._highlight = response.hits.hits.filter(hit => post._id.equals(hit._id))[0].highlight.text[0];
+		});
+
+		// Serialize
+		res(await Promise.all(posts.map(async post =>
+			await serialize(post, me))));
+	});
+}