1 files changed, 76 insertions, 0 deletions
diff --git a/contents/ui/activity.js b/contents/ui/activity.js
new file mode 100644
index 0000000..890082e
--- /dev/null
+++ b/contents/ui/activity.js
@@ -0,0 +1,76 @@
+function sameDay(due, now) {
+    return (
+        due.getFullYear() == now.getFullYear() &&
+        due.getMonth() == now.getMonth() &&
+        due.getDate() == now.getDate()
+    )
+}
+
+function dayDiff(due, now, stopAt) {
+    // due and now are both Date objects
+    // if due has the same day as now (i.e. due is today), return 0
+    // if due is tomorrow, return 1, the day after that 2, yesterday -1, etc.
+    // when the absolute value of diff reaches stopAt, return stopAt
+    let diff = 0
+    const step = (due > now) ? 1 : -1
+    while (!sameDay(due, now)) {
+        now.setDate(now.getDate() + step)
+        diff += step
+        if (Math.abs(diff) >= stopAt) {
+            return stopAt
+        }
+    }
+    return diff
+}
+
+function humanDue(isoDue) {
+    // converts ISO 8601 datetime string to relative time, e.g. tomorrow midnight
+    const daysOfWeek = [
+        i18n("Sunday"),
+        i18n("Monday"),
+        i18n("Tuesday"),
+        i18n("Wednesday"),
+        i18n("Thursday"),
+        i18n("Friday"),
+        i18n("Saturday"),
+    ]
+
+    try {
+        let due = new Date(isoDue)
+        if (due.toString() == "Invalid Date") {
+            console.warn(`Cannot parse due date: ${isoDue}`)
+            return isoDue
+        }
+
+        let now = new Date()
+        const pastDue = (due <= now)
+        const dayDifference = dayDiff(due, now, 8)
+        let humanDueString = ""
+
+        if (dayDifference <= -2) {
+            humanDueString = Qt.formatDate(due)
+        } else if (dayDifference == -1) {
+            humanDueString = i18n("Yesterday")
+        } else if (dayDifference == 0) {
+            humanDueString = i18n("Today")
+        } else if (dayDifference == 1) {
+            humanDueString = i18n("Tomorrow")
+        } else if (dayDifference <= 6) {
+            humanDueString = daysOfWeek[due.getDay()]
+        } else {
+            humanDueString = Qt.formatDate(due)
+        }
+
+        humanDueString += " " + Qt.formatTime(due)
+        return humanDueString
+    } catch (e) {
+        return isoDue // screw it
+    }
+}
+
+function dueLabelText() {
+    if (type != "assignment") { return "" }
+    if (submitted) { return i18n("Submitted") }
+    if (!dueAt) { return i18n("Due date not announced") }
+    return i18n("Due: ") + humanDue(dueAt)
+}