migrate to typescript

src/routes/getTotalStats.ts

@@ -0,0 +1,70 @@
+import {db} from '../databases/databases';
+import request from 'request';
+import {config} from '../config';
+import {Request, Response} from 'express';
+
+// A cache of the number of chrome web store users
+let chromeUsersCache = 0;
+let firefoxUsersCache = 0;
+
+// By the privacy friendly user counter
+let apiUsersCache = 0;
+
+let lastUserCountCheck = 0;
+
+export function getTotalStats(req: Request, res: Response) {
+    let row = db.prepare('get', "SELECT COUNT(DISTINCT userID) as userCount, COUNT(*) as totalSubmissions, " +
+        "SUM(views) as viewCount, SUM((endTime - startTime) / 60 * views) as minutesSaved FROM sponsorTimes WHERE shadowHidden != 1 AND votes >= 0", []);
+
+    if (row !== undefined) {
+        let extensionUsers = chromeUsersCache + firefoxUsersCache;
+
+        //send this result
+        res.send({
+            userCount: row.userCount,
+            activeUsers: extensionUsers,
+            apiUsers: Math.max(apiUsersCache, extensionUsers),
+            viewCount: row.viewCount,
+            totalSubmissions: row.totalSubmissions,
+            minutesSaved: row.minutesSaved,
+        });
+
+        // Check if the cache should be updated (every ~14 hours)
+        let now = Date.now();
+        if (now - lastUserCountCheck > 5000000) {
+            lastUserCountCheck = now;
+
+            updateExtensionUsers();
+        }
+    }
+}
+
+function updateExtensionUsers() {
+    if (config.userCounterURL) {
+        request.get(config.userCounterURL + "/api/v1/userCount", (err, response, body) => {
+            apiUsersCache = Math.max(apiUsersCache, JSON.parse(body).userCount);
+        });
+    }
+
+    request.get("https://addons.mozilla.org/api/v3/addons/addon/sponsorblock/", function (err, firefoxResponse, body) {
+        try {
+            firefoxUsersCache = parseInt(JSON.parse(body).average_daily_users);
+
+            request.get("https://chrome.google.com/webstore/detail/sponsorblock-for-youtube/mnjggcdmjocbbbhaepdhchncahnbgone", function (err, chromeResponse, body) {
+                if (body !== undefined) {
+                    try {
+                        chromeUsersCache = parseInt(body.match(/(?<=\<span class=\"e-f-ih\" title=\").*?(?= users\">)/)[0].replace(",", ""));
+                    } catch (error) {
+                        // Re-check later
+                        lastUserCountCheck = 0;
+                    }
+                } else {
+                    lastUserCountCheck = 0;
+                }
+            });
+        } catch (error) {
+            // Re-check later
+            lastUserCountCheck = 0;
+        }
+    });
+}