libredirect/src/assets/javascripts/services.js

window.browser = window.browser || window.chrome

import utils from "./utils.js"

let config = {},
	redirects = {},
	options = {}
let disabled, curNetwork, networkFallback, redirectType

async function getConfig() {
	return new Promise(resolve => {
		fetch("/config/config.json")
			.then(response => response.text())
			.then(data => {
				config = JSON.parse(data)
				resolve()
			})
	})
}

function camelCase(str) {
	return str.charAt(0).toUpperCase() + str.slice(1)
}

function init() {
	return new Promise(async resolve => {
		browser.storage.local.get(["network", "networkFallback"], r => {
			curNetwork = r.network
			networkFallback = r.networkFallback
		})
		//cur = current
		for (const service in config.services) {
			options[service] = {}
			browser.storage.local.get([`disable${camelCase(service)}`, `${service}Redirects`, `${service}RedirectType,`, `${service}Frontend`], r => {
				options[service].disabled = r["disable" + camelCase(service)]
				options[service].redirects = r[service + "Redirects"]
				options[service].frontend = r[service + "Frontend"]
				// console.log(r)
			})
			for (const frontend in config.services[service].frontends) {
				redirects[frontend] = {}
				for (const network in config.networks) {
					browser.storage.local.get([`${frontend}${camelCase(network)}RedirectsChecks`, `${frontend}${camelCase(network)}CustomRedirects`], r => {
						console.log(r)
						// console.log(`${frontend}${camelCase(network)}RedirectsChecks`)
						redirects[frontend][network] = [...r[frontend + camelCase(network) + "RedirectsChecks"], ...r[frontend + camelCase(network) + "CustomRedirects"]]
					})
				}
			}
		}
		resolve()
	})
}

function all(service) {
	let tmp = []
	for (frontend in config.services[service].frontends) {
		for (network in config.networks) tmp.push([...redirects[frontend][network]])
	}
}

await getConfig()
await init()
browser.storage.onChanged.addListener(init)

function redirect(url, type, initiator) {
	let randomInstance, frontend
	if (url.pathname == "/") return
	for (const service in config.services) {
		if (disabled && !disableOverride) continue
		let targets = service.targets
		if (targets == "datajson") {
			browser.storage.local.get(`${service}Targets`, (targets = r[service + "Targets"]))
		}

		if (initiator && (all(service).includes(initiator.origin) || targets.includes(initiator.host))) continue
		if (!targets.some(rx => rx.test(url.href))) continue
		if (type != redirectType && type != "both") continue
		browser.storage.local.get(`${service}Frontend`, (frontend = r[service + "Frontend"]))
		let instanceList = redirects[frontend][curNetwork]
		if (instanceList.length === 0 && networkFallback) instanceList = redirects[frontend].clearnet
		if (instanceList.length === 0 && redirects.indexOf(frontend) != -1) return
		randomInstance = utils.getRandomInstance(instanceList)
	}

	// Here is a (temperory) space for defining constants required in 2 or more switch cases.
	// When possible, try have the two switch cases share all their code as done with searx and searxng.
	// Do not do that when they do not share 100% of their code.

	const mapCentreRegex = /@(-?\d[0-9.]*),(-?\d[0-9.]*),(\d{1,2})[.z]/
	const dataLatLngRegex = /!3d(-?[0-9]{1,}.[0-9]{1,})!4d(-?[0-9]{1,}.[0-9]{1,})/
	const placeRegex = /\/place\/(.*)\//
	function convertMapCentre() {
		let [, lat, lon, zoom] = 0
		if (url.pathname.match(mapCentreRegex)) {
			// Set map centre if present
			;[, lat, lon, zoom] = url.pathname.match(mapCentreRegex)
		} else if (url.searchParams.has("center")) {
			;[lat, lon] = url.searchParams.get("center").split(",")
			zoom = url.searchParams.get("zoom") ?? "17"
		}
		return [zoom, lon, lat]
	}

	switch (frontend) {
		// This is where all instance-specific code must be ran to convert the service url to one that can be understood by the frontend.
		case "beatbump":
			return `${randomInstance}${url.pathname}${url.search}`
				.replace("/watch?v=", "/listen?id=")
				.replace("/channel/", "/artist/")
				.replace("/playlist?list=", "/playlist/VL")
				.replace(/\/search\?q=.*/, searchQuery => searchQuery.replace("?q=", "/") + "?filter=song")
		case "hyperpipe":
			return `${randomInstance}${url.pathname}${url.search}`.replace(/\/search\?q=.*/, searchQuery => searchQuery.replace("?q=", "/"))
		case "bibliogram":
			const reservedPaths = ["u", "p", "privacy"]
			if (url.pathname === "/" || reservedPaths.includes(url.pathname.split("/")[1])) return `${randomInstance}${url.pathname}${url.search}`
			if (url.pathname.startsWith("/reel") || url.pathname.startsWith("/tv")) return `${randomInstance}/p${url.pathname.replace(/\/reel|\/tv/i, "")}${url.search}`
			else return `${randomInstance}/u${url.pathname}${url.search}` // Likely a user profile, redirect to '/u/...'
		case "lbryDesktop":
			return url.href.replace(/^https?:\/{2}odysee\.com\//, "lbry://").replace(/:(?=[a-zA-Z0-9])/g, "#")
		case "neuters":
			if (url.pathname.startsWith("/article/") || url.pathname.startsWith("/pf/") || url.pathname.startsWith("/arc/") || url.pathname.startsWith("/resizer/")) return null
			else if (url.pathname.endsWith("/")) return `${randomInstance}${url.pathname}`
			else return `${randomInstance}${url.pathname}/`
		case "searx":
		case "searxng":
			return `${randomInstance}/?q=${encodeURIComponent(url.searchParams.get("q"))}`
		case "whoogle":
			return `${randomInstance}/search${encodeURIComponent(url.searchParams.get("q"))}`
		case "librex":
			return `${randomInstance}/search.php${encodeURIComponent(url.searchParams.get("q"))}`
		case "send":
			return randomInstance
		case "nitter":
			if (url.host.split(".")[0] === "pbs" || url.host.split(".")[0] === "video") {
				const [, id, format, extra] = url.search.match(/(.*)\?format=(.*)&(.*)/)
				const query = encodeURIComponent(`${id}.${format}?${extra}`)
				return `${randomInstance}/pic${url.pathname}${query}`
			} else if (url.pathname.split("/").includes("tweets")) return `${randomInstance}${url.pathname.replace("/tweets", "")}${url.search}`
			else if (url.host == "t.co") return `${randomInstance}/t.co${url.pathname}`
			else return `${randomInstance}${url.pathname}${url.search}`
		case "yatte":
			return url.href.replace(/^https?:\/{2}/, "yattee://")
		case "freetube":
			return `freetube://https://youtube.com${url.pathname}${url.search}`
		case "simplyTranslate":
			return `${randomInstance}/${url.search}`
		case "osm": {
			if (initiator && initiator.host === "earth.google.com") return
			travelModes = {
				driving: "fossgis_osrm_car",
				walking: "fossgis_osrm_foot",
				bicycling: "fossgis_osrm_bike",
				transit: "fossgis_osrm_car", // not implemented on OSM, default to car.
			}

			function addressToLatLng(address) {
				const xmlhttp = new XMLHttpRequest()
				xmlhttp.open("GET", `https://nominatim.openstreetmap.org/search/${address}?format=json&limit=1`, false)
				xmlhttp.send()
				if (xmlhttp.status === 200) {
					const json = JSON.parse(xmlhttp.responseText)[0]
					if (json) {
						console.log("json", json)
						return [`${json.lat},${json.lon}`, `${json.boundingbox[2]},${json.boundingbox[1]},${json.boundingbox[3]},${json.boundingbox[0]}`]
					}
				}
				console.info("Error: Status is " + xmlhttp.status)
			}

			let mapCentre = "#"
			let prefs = {}

			const mapCentreData = convertMapCentre()
			if (mapCentreData[0] && mapCentreData[1] && mapCentreData[2]) mapCentre = `#map=${mapCentreData[0]}/${mapCentreData[1]}/${mapCentreData[2]}`
			if (url.searchParams.get("layer")) prefs.layers = osmLayers[url.searchParams.get("layer")]

			if (url.pathname.includes("/embed")) {
				// Handle Google Maps Embed API
				// https://www.google.com/maps/embed/v1/place?key=AIzaSyD4iE2xVSpkLLOXoyqT-RuPwURN3ddScAI&q=Eiffel+Tower,Paris+France
				//console.log("embed life")

				let query = ""
				if (url.searchParams.has("q")) query = url.searchParams.get("q")
				else if (url.searchParams.has("query")) query = url.searchParams.has("query")
				else if (url.searchParams.has("pb"))
					try {
						query = url.searchParams.get("pb").split(/!2s(.*?)!/)[1]
					} catch (error) {
						console.error(error)
					} // Unable to find map marker in URL.

				let [coords, boundingbox] = addressToLatLng(query)
				prefs.bbox = boundingbox
				prefs.marker = coords
				prefs.layer = "mapnik"
				let prefsEncoded = new URLSearchParams(prefs).toString()
				return `${randomInstance}/export/embed.html?${prefsEncoded}`
			} else if (url.pathname.includes("/dir")) {
				// Handle Google Maps Directions
				// https://www.google.com/maps/dir/?api=1&origin=Space+Needle+Seattle+WA&destination=Pike+Place+Market+Seattle+WA&travelmode=bicycling

				let travMod = url.searchParams.get("travelmode")
				if (url.searchParams.has("travelmode")) prefs.engine = travelModes[travMod]

				let orgVal = url.searchParams.get("origin")
				let destVal = url.searchParams.get("destination")

				let org
				addressToLatLng(orgVal, a => (org = a))
				let dest
				addressToLatLng(destVal, a => (dest = a))
				prefs.route = `${org};${dest}`

				let prefsEncoded = new URLSearchParams(prefs).toString()
				return `${randomInstance}/directions?${prefsEncoded}${mapCentre}`
			} else if (url.pathname.includes("data=") && url.pathname.match(dataLatLngRegex)) {
				// Get marker from data attribute
				// https://www.google.com/maps/place/41%C2%B001'58.2%22N+40%C2%B029'18.2%22E/@41.032833,40.4862063,17z/data=!3m1!4b1!4m6!3m5!1s0x0:0xf64286eaf72fc49d!7e2!8m2!3d41.0328329!4d40.4883948
				//console.log("data life")

				let [, mlat, mlon] = url.pathname.match(dataLatLngRegex)

				return `${randomInstance}/search?query=${mlat}%2C${mlon}`
			} else if (url.searchParams.has("ll")) {
				// Get marker from ll param
				// https://maps.google.com/?ll=38.882147,-76.99017
				//console.log("ll life")

				const [mlat, mlon] = url.searchParams.get("ll").split(",")

				return `${randomInstance}/search?query=${mlat}%2C${mlon}`
			} else if (url.searchParams.has("viewpoint")) {
				// Get marker from viewpoint param.
				// https://www.google.com/maps/@?api=1&map_action=pano&viewpoint=48.857832,2.295226&heading=-45&pitch=38&fov=80
				//console.log("viewpoint life")

				const [mlat, mlon] = url.searchParams.get("viewpoint").split(",")

				return `${randomInstance}/search?query=${mlat}%2C${mlon}`
			} else {
				// Use query as search if present.
				//console.log("normal life")

				let query
				if (url.searchParams.has("q")) query = url.searchParams.get("q")
				else if (url.searchParams.has("query")) query = url.searchParams.get("query")
				else if (url.pathname.match(placeRegex)) query = url.pathname.match(placeRegex)[1]

				let prefsEncoded = new URLSearchParams(prefs).toString()
				if (query) return `${randomInstance}/search?query="${query}${mapCentre}&${prefsEncoded}`
			}

			let prefsEncoded = new URLSearchParams(prefs).toString()
			console.log("mapCentre", mapCentre)
			console.log("prefs", prefs)
			console.log("prefsEncoded", prefsEncoded)
			return `${randomInstance}/${mapCentre}&${prefsEncoded}`
		}
		case "facil": {
			if (initiator && initiator.host === "earth.google.com") return
			let travelModes = {
				driving: "car",
				walking: "pedestrian",
				bicycling: "bicycle",
				transit: "car", // not implemented on Facil, default to car.
			}
			const mapCentreData = convertMapCentre()
			let mapCentre = "#"
			if (mapCentreData[0] && mapCentreData[1] && mapCentreData[2]) mapCentre = `#${mapCentreData[0]}/${mapCentreData[1]}/${mapCentreData[2]}`

			if (url.pathname.includes("/embed")) {
				// Handle Google Maps Embed API
				// https://www.google.com/maps/embed/v1/place?key=AIzaSyD4iE2xVSpkLLOXoyqT-RuPwURN3ddScAI&q=Eiffel+Tower,Paris+France
				//console.log("embed life")

				let query = ""
				if (url.searchParams.has("q")) query = url.searchParams.get("q")
				else if (url.searchParams.has("query")) query = url.searchParams.has("query")
				else if (url.searchParams.has("pb"))
					try {
						query = url.searchParams.get("pb").split(/!2s(.*?)!/)[1]
					} catch (error) {
						console.error(error)
					} // Unable to find map marker in URL.

				return `${randomInstance}/#q=${query}`
			} else if (url.pathname.includes("/dir")) {
				// Handle Google Maps Directions
				// https://www.google.com/maps/dir/?api=1&origin=Space+Needle+Seattle+WA&destination=Pike+Place+Market+Seattle+WA&travelmode=bicycling

				let travMod = url.searchParams.get("travelmode")

				let orgVal = url.searchParams.get("origin")
				let destVal = url.searchParams.get("destination")

				return `${randomInstance}/#q=${orgVal}%20to%20${destVal}%20by%20${travelModes[travMod]}`
			} else if (url.pathname.includes("data=") && url.pathname.match(dataLatLngRegex)) {
				// Get marker from data attribute
				// https://www.google.com/maps/place/41%C2%B001'58.2%22N+40%C2%B029'18.2%22E/@41.032833,40.4862063,17z/data=!3m1!4b1!4m6!3m5!1s0x0:0xf64286eaf72fc49d!7e2!8m2!3d41.0328329!4d40.4883948
				//console.log("data life")

				let [, mlat, mlon] = url.pathname.match(dataLatLngRegex)

				return `${randomInstance}/#q=${mlat}%2C${mlon}`
			} else if (url.searchParams.has("ll")) {
				// Get marker from ll param
				// https://maps.google.com/?ll=38.882147,-76.99017
				//console.log("ll life")

				const [mlat, mlon] = url.searchParams.get("ll").split(",")

				return `${randomInstance}/#q=${mlat}%2C${mlon}`
			} else if (url.searchParams.has("viewpoint")) {
				// Get marker from viewpoint param.
				// https://www.google.com/maps/@?api=1&map_action=pano&viewpoint=48.857832,2.295226&heading=-45&pitch=38&fov=80
				//console.log("viewpoint life")

				const [mlat, mlon] = url.searchParams.get("viewpoint").split(",")

				return `${randomInstance}/#q=${mlat}%2C${mlon}`
			} else {
				// Use query as search if present.
				//console.log("normal life")

				let query
				if (url.searchParams.has("q")) query = url.searchParams.get("q")
				else if (url.searchParams.has("query")) query = url.searchParams.get("query")
				else if (url.pathname.match(placeRegex)) query = url.pathname.match(placeRegex)[1]

				if (query) return `${randomInstance}/${mapCentre}/Mpnk/${query}`
			}
		}
		case "wikiless":
			let GETArguments = []
			if (url.search.length > 0) {
				let search = url.search.substring(1) //get rid of '?'
				let argstrings = search.split("&")
				for (let i = 0; i < argstrings.length; i++) {
					let args = argstrings[i].split("=")
					GETArguments.push([args[0], args[1]])
				}
			}

			let link = `${randomInstance}${url.pathname}`
			let urlSplit = url.host.split(".")
			if (urlSplit[0] != "wikipedia" && urlSplit[0] != "www") {
				if (urlSplit[0] == "m") GETArguments.push(["mobileaction", "toggle_view_mobile"])
				else GETArguments.push(["lang", urlSplit[0]])
				if (urlSplit[1] == "m") GETArguments.push(["mobileaction", "toggle_view_mobile"])
				// wikiless doesn't have mobile view support yet
			}
			for (let i = 0; i < GETArguments.length; i++) link += (i == 0 ? "?" : "&") + GETArguments[i][0] + "=" + GETArguments[i][1]
			return link

		case "lingva":
			let params_arr = url.search.split("&")
			params_arr[0] = params_arr[0].substring(1)
			let params = {}
			for (let i = 0; i < params_arr.length; i++) {
				let pair = params_arr[i].split("=")
				params[pair[0]] = pair[1]
			}
			if (params.sl && params.tl && params.text) {
				return `${randomInstance}/${params.sl}/${params.tl}/${params.text}`
			}
			return randomInstance
		default:
			return `${randomInstance}${url.pathname}${url.search}`
	}
}

function initDefaults() {
	return new Promise(async resolve => {
		fetch("/instances/data.json")
			.then(response => response.text())
			.then(async data => {
				let dataJson = JSON.parse(data)
				redirects = dataJson
				console.log(redirects)
				console.log(config)
				browser.storage.local.get(["cloudflareBlackList", "authenticateBlackList", "offlineBlackList"], async r => {
					for (const service in config.services) {
						for (const defaultOption in service.defaults) {
							browser.storage.local.set({ [defaultOption]: service.defaults[defaultOption] })
						}
						for (const frontend in config.services[service].frontends) {
							if ((config.services[service].targets = "datajson")) {
								browser.storage.local.set({ [service + "Targets"]: redirects[service] })
								continue
							}
							for (const instance of [...r.cloudflareBlackList, ...r.authenticateBlackList, ...r.offlineBlackList]) {
								let i = redirects[frontend]["clearnet"].indexOf(instance)
								if (i > -1) redirects[frontend]["clearnet"].splice(i, 1)
							}
							for (const network in config.networks) {
								browser.storage.local.set({
									[frontend + camelCase(network) + "RedirectsChecks"]: [...redirects[frontend][network]],
									[frontend + camelCase(network) + "CustomRedirects"]: [],
								})
							}
						}
					}
					;() => resolve()
				})
			})
	})
}

export default {
	redirect,
	initDefaults,
}