fnx_web/res/include/script/file_viewer/Toolbar.js

class Toolbar {
	constructor(viewer) {let t = this;
		t.viewer = viewer;
		t.visible = false;
		t.sharebarVisible = false;

		t.divToolbar       = document.getElementById("toolbar");
		t.divFilePreview   = document.getElementById("filepreview");
		t.downloadFrame    = document.getElementById("download_frame");
		t.spanViews        = document.getElementById("stat_views");
		t.spanDownloads    = document.getElementById("stat_downloads");
		t.spanSize         = document.getElementById("stat_size");

		t.btnToggleToolbar = document.getElementById("btn_toggle_toolbar");
		t.btnDownload      = document.getElementById("btn_download");
		t.btnCopyLink      = document.getElementById("btn_copy");
		t.spanCopyLink     = document.querySelector("#btn_copy > span");
		t.btnShare         = document.getElementById("btn_share");
		t.divSharebar      = document.getElementById("sharebar");

		t.btnToggleToolbar.addEventListener("click", () => { t.toggle(); });
		t.btnDownload.addEventListener("click", () => { t.download(); });
		t.btnCopyLink.addEventListener("click", () => { t.copyUrl(); });
		t.btnShare.addEventListener("click", () => { t.toggleSharebar(); });
	}

	toggle() {let t = this;
		if (t.visible) {
			if (t.sharebarVisible) { t.toggleSharebar(); }

			t.divToolbar.style.left = "-8em";
			t.divFilePreview.style.left = "0px";
			t.btnToggleToolbar.classList.remove("button_highlight");
			t.visible = false;
		} else {
			t.divToolbar.style.left = "0px";
			t.divFilePreview.style.left = "8em";
			t.btnToggleToolbar.classList.add("button_highlight");
			t.visible = true;
		}
	}

	toggleSharebar(){let t = this;
		if (navigator.share) {
			navigator.share({
				title: t.viewer.title,
				text: "Download " + t.viewer.title + " here",
				url: window.location.href
			});
			return;
		}

		if(t.sharebarVisible){
			t.divSharebar.style.left = "-8em";
			t.btnShare.classList.remove("button_highlight")
			t.sharebarVisible = false;
		}else{
			t.divSharebar.style.left = "8em";
			t.btnShare.classList.add("button_highlight")
			t.sharebarVisible = true;
		}
	}

	download() {let t = this;
		let triggerDL = (captchaResp = "") => {
			if (captchaResp === "") {
				t.downloadFrame.src = apiEndpoint+"/file/"+
					t.viewer.currentFile+"?download";
			} else {
				t.downloadFrame.src = apiEndpoint+"/file/"+
					t.viewer.currentFile+"?download&recaptcha_response="+captchaResp;
			}
		}

		if (captchaKey === "none"){
			// If the server doesn't support captcha there's no use in checking
			// availability
			triggerDL();
			return;
		}
		if (recaptchaResponse !== "") {
			// Captcha already filled in. Use the saved captcha responsse to
			// download the file
			triggerDL(recaptchaResponse);

			// Reset the key
			recaptchaResponse = "";
			return;
		}

		fetch(apiEndpoint+"/file/"+t.viewer.currentFile+"/availability").then(resp => {
			return resp.json();
		}).then(resp => {
			let popupDiv = document.getElementById("captcha_popup");
			let popupTitle = document.getElementById("captcha_popup_title");
			let popupContent = document.getElementById("captcha_popup_content");

			let showCaptcha = () => {
				// Load the recaptcha script with a load function
				let script = document.createElement("script");
				script.src = "https://www.google.com/recaptcha/api.js?onload=loadCaptcha&render=explicit";
				document.body.appendChild(script);

				// Show the popup
				popupDiv.style.opacity = "1";
				popupDiv.style.visibility = "visible";
			}

			if (resp.value === "file_rate_limited_captcha_required") {
				popupTitle.innerText = "Rate limiting enabled!";
				popupContent.innerText = "This file is using a suspicious "+
					"amount of bandwidth relative to its popularity. To "+
					"continue downloading this file you will have to "+
					"prove that you're a human first.";
				showCaptcha();
			} else if (resp.value === "virus_detected_captcha_required") {
				popupTitle.innerText = "Malware warning!";
				popupContent.innerText = "According to our scanning "+
					"systems this file may contain a virus  of type '"+
					resp.extra+"'. You can continue downloading this file at "+
					"your own risk, but you will have to prove that you're a "+
					"human first.";
				showCaptcha();
			} else {
				console.warn("resp.value not valid: "+resp.value);
				triggerDL();
			}
		}).catch(e => {
			console.warn("fetch availability failed: "+e);
			triggerDL();
		});
	}

	copyUrl() {let t = this;
		if(copyText(window.location.href)) {
			console.log('Text copied');
			t.spanCopyLink.innerText = "Copied!";
			t.btnCopyLink.classList.add("button_highlight")
		} else {
			console.log('Copying not supported');
			t.spanCopyLink.innerText = "Error!";
			alert("Your browser does not support copying text.");
		}

		// Return to normal
		setTimeout(() => {
			t.spanCopyLink.innerText = "Copy";
			t.btnCopyLink.classList.remove("button_highlight")
		}, 60000);
	}

	setStats(file) {let t = this;
		t.spanViews.innerText = file.views
		t.spanDownloads.innerText = Math.round((file.bandwidth_used/file.size)*10)/10;
		t.spanSize.innerText = formatDataVolume(file.size, 3);
	}
}

// Called by the google recaptcha script
let recaptchaResponse = "";
function loadCaptcha(){
	grecaptcha.render("captcha_popup_captcha", {
		sitekey: captchaKey,
		theme: "dark",
		callback: token => {
			recaptchaResponse = token;
			document.getElementById("btn_download").click();

			// Hide the popup
			setTimeout(() => {
				let popupDiv = document.getElementById("captcha_popup");
				popupDiv.style.opacity = "0";
				popupDiv.style.visibility = "hidden";
			}, 1000)
		}
	});
}