From fd0e3a1891ed222b9cd4e61888944fdd257777f7 Mon Sep 17 00:00:00 2001
From: Cadence Fish <cloudrac3r@vivaldi.net>
Date: Wed, 29 Jan 2020 00:41:38 +1300
Subject: [PATCH] Actually add the /api/instances file

---
 src/site/api/instances.js | 71 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 71 insertions(+)
 create mode 100644 src/site/api/instances.js

diff --git a/src/site/api/instances.js b/src/site/api/instances.js
new file mode 100644
index 0000000..2745f60
--- /dev/null
+++ b/src/site/api/instances.js
@@ -0,0 +1,71 @@
+const constants = require("../../lib/constants")
+const {RequestCache} = require("../../lib/cache")
+const {request} = require("../../lib/utils/request")
+const {Parser} = require("../../lib/utils/parser/parser")
+
+const instanceListCache = new RequestCache(constants.caching.instance_list_cache_time)
+
+module.exports = [
+	{
+		route: "/api/instances", methods: ["GET"], code: () => {
+			return instanceListCache.getOrFetch("instances", () => {
+				return request(constants.resources.instances_wiki_raw).then(res => res.text()).then(text => {
+					const result = (() => {
+						const instances = []
+						const parser = new Parser(text)
+						parser.seek("# Instance list", {moveToMatch: true, useEnd: true})
+						let inTable = false
+						while (!inTable && parser.hasRemaining()) {
+							parser.store()
+							const line = parser.get({split: "\n"})
+							if (line.startsWith("|")) {
+								inTable = true
+								parser.restore()
+							}
+						}
+						if (!parser.hasRemaining()) return null
+						while (inTable && parser.hasRemaining()) {
+							const line = parser.get({split: "\n"})
+							if (line.startsWith("|")) {
+								/** [empty, official, address, country] */
+								const parts = line.split("|")
+								if (parts.length >= 4 && parts[2].includes("://")) {
+									instances.push({
+										address: parts[2].trim(),
+										country: parts[3].match(/[A-Z]{2,}|$/)[0] || null,
+										official: parts[1].trim() === ":white_check_mark:"
+									})
+								}
+							} else {
+								inTable = false
+							}
+						}
+						return instances
+					})()
+					if (Array.isArray(result)) {
+						return {
+							statusCode: 200,
+							contentType: "application/json",
+							content: {
+								status: "ok",
+								version: "1.0",
+								generatedAt: Date.now(),
+								data: result
+							}
+						}
+					} else {
+						return {
+							statusCode: 503,
+							contentType: "application/json",
+							content: {
+								status: "fail",
+								generatedAt: Date.now(),
+								message: "Unable to parse the table from the wiki page: https://raw.githubusercontent.com/wiki/cloudrac3r/bibliogram/Instances.md"
+							}
+						}
+					}
+				})
+			})
+		}
+	}
+]