Allow semver query for stats inner version

src/site/api/stats.js

@@ -0,0 +1,119 @@
+const semver = require("semver")
+const child_process = require("child_process")
+const md = require("mixin-deep")
+const constants = require("../../lib/constants")
+const {history} = require("../../lib/collectors")
+const {redirect} = require("pinski/plugins")
+
+function reply(statusCode, content) {
+	return {
+		statusCode: statusCode,
+		contentType: "application/json",
+		content: JSON.stringify(content)
+	}
+}
+
+// Load current commit hash
+
+let commit = ""
+{
+	const p = child_process.spawn("git", ["rev-parse", "--short", "HEAD"])
+	p.on("error", console.error)
+	p.stdout.on("data", data => {
+		const string = data.toString()
+		commit = "-" + string.match(/[0-9a-f]+/)[0]
+	})
+}
+
+// Set up inner versioning
+
+const displayVersions = ["1.0", "1.1", "1.2"]
+const versions = new Map(displayVersions.map(v => [v, semver.coerce(v)]))
+const features = [
+	"PAGE_PROFILE",
+	"PAGE_POST",
+	"API_STATS",
+	"PAGE_HOME",
+	"API_INSTANCES",
+	"BLOCK_DETECT_USER_HTML"
+]
+const innerMap = new Map()
+{
+	const addVersion = function(shortVersion, block) {
+		const coerced = semver.coerce(shortVersion)
+		const previousVersion = semver.maxSatisfying([...innerMap.keys()], coerced.major+".x")
+		let previous = {}
+		if (previousVersion) previous = innerMap.get(previousVersion)
+		md(block, previous)
+		md(block, {version: shortVersion})
+		innerMap.set(coerced.version, block)
+	}
+	addVersion("1.0", {
+		features
+	})
+	addVersion("1.1", {
+		availableVersions: [...versions.keys()],
+		history: history.export()
+	})
+	addVersion("1.2", {
+		settings: {
+			rssEnabled: constants.settings.rss_enabled
+		}
+	})
+}
+
+module.exports = [
+	{
+		route: "/.well-known/nodeinfo", methods: ["GET"], code: async ({fill}) => {
+			return reply(200, {
+				link: [
+					{
+						rel: "http://nodeinfo.diaspora.software/ns/schema/2.0",
+						href: `${constants.website_origin}/api/stats/2.0`
+					}
+				]
+			})
+		}
+	},
+	{
+		route: "/api/stats", methods: ["GET"], code: async () => {
+			return redirect("/api/stats/2.0", 302)
+		}
+	},
+	{
+		route: "/api/stats/2.0", methods: ["GET"], code: async ({url}) => {
+			const selected = semver.maxSatisfying([...innerMap.keys()], url.searchParams.get("bv") || "1.0")
+			if (!selected) return reply(400, {
+				status: "fail",
+				fields: ["q:bv"],
+				message: "query parameter `bv` selects inner version, must be either missing or a semver query matching any of " + displayVersions.map(v => "`"+v+"`").join(", ") + "."
+			})
+			const inner = innerMap.get(selected)
+			return reply(200, {
+				version: "2.0",
+				software: {
+					name: "bibliogram",
+					version: "1.0.0"+commit
+				},
+				protocols: [],
+				services: {
+					inbound: [
+						"instagram"
+					],
+					outbound: []
+				},
+				openRegistrations: false,
+				usage: {
+					users: {
+						total: 0,
+						activeHalfyear: 0,
+						activeMonth: 0
+					}
+				},
+				metadata: {
+					bibliogram: inner
+				}
+			})
+		}
+	}
+]