add bouncing rate + adjustments

dashboard/server/api/data/bouncing_rate.ts

@@ -0,0 +1,79 @@
+import { getUserProjectFromId } from "~/server/LIVE_DEMO_DATA";
+import { SessionModel } from "@schema/metrics/SessionSchema";
+import { VisitModel } from "@schema/metrics/VisitSchema";
+import { Redis } from "~/server/services/CacheService";
+import DateService from "@services/DateService";
+import mongoose from "mongoose";
+
+export default defineEventHandler(async event => {
+
+    const project_id = getHeader(event, 'x-pid');
+    if (!project_id) return;
+
+    const user = getRequestUser(event);
+    const project = await getUserProjectFromId(project_id, user);
+    if (!project) return;
+
+    const from = getRequestHeader(event, 'x-from');
+    const to = getRequestHeader(event, 'x-to');
+
+    if (!from || !to) return setResponseStatus(event, 400, 'x-from and x-to are required');
+
+    const slice = getRequestHeader(event, 'x-slice');
+
+    const cacheKey = `bouncing_rate:${project_id}:${from}:${to}`;
+    const cacheExp = 60 * 60; //1 hour
+
+    return await Redis.useCacheV2(cacheKey, cacheExp, async (noStore, updateExp) => {
+
+        const dateDistDays = (new Date(to).getTime() - new Date(from).getTime()) / (1000 * 60 * 60 * 24)
+        // 15 Days
+        if (slice === 'hour' && (dateDistDays > 15)) throw Error('Date gap too big for this slice');
+        // 1 Year
+        if (slice === 'day' && (dateDistDays > 365)) throw Error('Date gap too big for this slice');
+        // 3 Years
+        if (slice === 'month' && (dateDistDays > 365 * 3)) throw Error('Date gap too big for this slice');
+
+
+        const allDates = DateService.createBetweenDates(from, to, slice as any);
+
+        const result: { date: string, value: number }[] = [];
+
+        for (const date of allDates.dates) {
+
+            const visits = await VisitModel.aggregate([
+                {
+                    $match: {
+                        project_id: project._id,
+                        created_at: {
+                            $gte: date.startOf(slice as any).toDate(),
+                            $lte: date.endOf(slice as any).toDate()
+                        }
+                    },
+                },
+                { $group: { _id: "$session", count: { $sum: 1, } } },
+            ]);
+
+            const sessions = await SessionModel.aggregate([
+                {
+                    $match: {
+                        project_id: project._id,
+                        created_at: {
+                            $gte: date.startOf(slice as any).toDate(),
+                            $lte: date.endOf(slice as any).toDate()
+                        }
+                    },
+                },
+                { $group: { _id: "$session", count: { $sum: 1, }, duration: { $sum: '$duration' } } },
+            ]);
+
+            const total = visits.length;
+            const bounced = sessions.filter(e => (e.duration / e.count) < 1).length;
+            const bouncing_rate = 100 / total * bounced;
+            result.push({ date: date.toISOString(), value: bouncing_rate });
+        }
+        
+        return result;
+
+    });
+});