Allow not counting time in private tabs

Closes https://github.com/ajayyy/SponsorBlock/issues/703

public/_locales/en/messages.json

@@ -200,6 +200,9 @@
     "whatViewTracking": {
         "message": "This feature tracks which segments you have skipped to let users know how much their submission has helped others and used as a metric along with upvotes to ensure that spam doesn't get into the database. The extension sends a message to the server each time you skip a segment. Hopefully most people don't change this setting so that the view numbers are accurate. :)"
     },
+    "enableViewTrackingInPrivate": {
+        "message": "Enable Skip Count Tracking In Private/Incognito tabs"
+    },
     "enableQueryByHashPrefix": {
         "message": "Query By Hash Prefix"
     },

public/options/options.html

@@ -310,6 +310,19 @@
 			<br/>
 			<br/>
 
+			<div option-type="toggle" sync-option="trackViewCountInPrivate" private-mode-only="true">
+				<label class="switch-container" label-name="__MSG_enableViewTrackingInPrivate__">
+					<label class="switch">
+						<input type="checkbox" checked>
+						<span class="slider round"></span>
+					</label>
+				</label>
+
+				<br/>
+				<br/>
+				<br/>
+			</div>
+
 			<div option-type="toggle" sync-option="refetchWhenNotFound">
 				<label class="switch-container" label-name="__MSG_enableRefetchWhenNotFound__">
 					<label class="switch">

src/config.ts

@@ -21,6 +21,7 @@ interface SBConfig {
     showTimeWithSkips: boolean,
     disableSkipping: boolean,
     trackViewCount: boolean,
+    trackViewCountInPrivate: boolean,
     dontShowNotice: boolean,
     hideVideoPlayerControls: boolean,
     hideInfoButtonPlayerControls: boolean,
@@ -154,6 +155,7 @@ const Config: SBObject = {
         showTimeWithSkips: true,
         disableSkipping: false,
         trackViewCount: true,
+        trackViewCountInPrivate: true,
         dontShowNotice: false,
         hideVideoPlayerControls: false,
         hideInfoButtonPlayerControls: false,

src/content.ts

@@ -987,8 +987,8 @@ function previewTime(time: number, unpause = true) {
 
 //send telemetry and count skip
 function sendTelemetryAndCount(skippingSegments: SponsorTime[], secondsSkipped: number, fullSkip: boolean) {
-    if (!Config.config.trackViewCount) return;
-    
+    if (!Config.config.trackViewCount || (!Config.config.trackViewCountInPrivate && chrome.extension.inIncognitoContext)) return;
+
     let counted = false;
     for (const segment of skippingSegments) {
         const index = sponsorTimes.indexOf(segment);

src/options.ts

@@ -31,6 +31,11 @@ async function init() {
     const optionsElements = optionsContainer.querySelectorAll("*");
 
     for (let i = 0; i < optionsElements.length; i++) {
+        if (optionsElements[i].getAttribute("private-mode-only") === "true" && !(await isIncognitoAllowed())) {
+            optionsElements[i].classList.add("hidden");
+            continue;
+        }
+
         switch (optionsElements[i].getAttribute("option-type")) {
             case "toggle": {
                 const option = optionsElements[i].getAttribute("sync-option");
@@ -540,3 +545,7 @@ function copyDebugOutputToClipboard() {
         alert(chrome.i18n.getMessage("copyDebugInformationFailed"));
       });
 }
+
+function isIncognitoAllowed(): Promise<boolean> {
+    return new Promise((resolve) => chrome.extension.isAllowedIncognitoAccess(resolve));
+}