#144 - Track Users Login History & Active Users v0.1

<!-- 💙 MEMBERSCRIPT #144 v0.1 💙 - TRACK A USERS LOGIN HISTORY & ACTIVE USERS -->
<script>
  (function(){
    const memberstack = window.$memberstackDom;

    // Helper: Execute callback when Memberstack is ready
    function onMemberstackReady(cb) {
      if (window.$memberstackReady) {
        cb();
      } else {
        document.addEventListener("memberstack.ready", cb);
      }
    }

    async function initTracking() {
      // Check if a member is logged in (via localStorage)
      const currentUser = JSON.parse(localStorage.getItem("_ms-mem") || "null");
      if (!currentUser) {
        console.warn("No logged-in member found. Tracking not applied.");
        return;
      }

      // Retrieve member metadata
      const memberJson = await memberstack.getMemberJSON();
      let metadata = memberJson.data || {};

      // Ensure userVisits exists as an array
      metadata.userVisits = Array.isArray(metadata.userVisits) ? metadata.userVisits : [];

      // Use ISO date (YYYY-MM-DD) to record one visit per day
      const today = new Date().toISOString().split("T")[0];
      if (!metadata.userVisits.includes(today)) {
        metadata.userVisits.push(today);
      }

      // Helper: Compute consecutive login streak from userVisits
      function computeStreak(visits) {
        if (!visits.length) return 0;
        // Ensure dates are unique and sorted ascending
        const uniqueVisits = [...new Set(visits)].sort();
        let streak = 1;
        let currentDate = new Date(uniqueVisits[uniqueVisits.length - 1]);
        for (let i = uniqueVisits.length - 2; i >= 0; i--) {
          const prevDate = new Date(uniqueVisits[i]);
          const diffDays = Math.floor((currentDate - prevDate) / (1000 * 60 * 60 * 24));
          if (diffDays === 1) {
            streak++;
            currentDate = prevDate;
          } else {
            break;
          }
        }
        return streak;
      }

      // Calculate the login streak and total visits
      metadata.loginStreak = computeStreak(metadata.userVisits);
      metadata.totalVisits = metadata.userVisits.length;

      // Update Memberstack metadata
      await memberstack.updateMemberJSON({ json: metadata });

      console.log("User visits:", metadata.userVisits);
      console.log("Login streak:", metadata.loginStreak);
      console.log("Total visits:", metadata.totalVisits);
    }

    onMemberstackReady(initTracking);
  })();
</script>