Complete recurring tasks by setting their start date to the next recu…

…rrence date

src/models/task.js

@@ -95,8 +95,7 @@ export default class Task {
 		this._completed = !!comp
 		this._completedDate = comp ? comp.toJSDate() : null
 		this._completedDateMoment = moment(this._completedDate, 'YYYYMMDDTHHmmss')
-		const recur = this.vtodo.getFirstPropertyValue('rrule')
-		this._recurring = !!recur
+		this._recurrence = this.vtodo.getFirstPropertyValue('rrule')
 		this._status = this.vtodo.getFirstPropertyValue('status')
 		this._note = this.vtodo.getFirstPropertyValue('description') || ''
 		this._related = this.getParent()?.getFirstValue() || null
@@ -331,8 +330,17 @@ export default class Task {
 		return this._completedDateMoment.clone()
 	}
 
+	get recurrence() {
+		return this._recurrence
+	}
+
 	get recurring() {
-		return this._recurring
+		if (this._start === null || this._recurrence === null) {
+			return false
+		}
+		const iter = this._recurrence.iterator(this.start);
+		iter.next();
+		return iter.next() !== null
 	}
 
 	get status() {
@@ -680,6 +688,27 @@ export default class Task {
 		).toSeconds()
 	}
 
+	/**
+	 * For completing a recurring task, tries to set the task start date to the next recurrence date.
+	 *
+	 * Does nothing if we are at the end of the recurrence (RRULE:UNTIL was reached).
+	 */
+	completeRecurring() {
+		// Get recurrence iterator, starting at start date
+		const iter = this.recurrence.iterator(this.start);
+		// Skip the start date itself
+		iter.next();
+		// If there is a next recurrence, update the start date to next recurrence date
+		let nextRecurrence = iter.next();
+		if (nextRecurrence !== null) {
+			this.start = nextRecurrence;
+			// If the due date now lies before start date, clear it
+			if (this.due !== null && this.due.compare(this.start) < 0) {
+				this.due = null
+			}
+		}
+	}
+
 	/**
 	 * Checks if the task matches the search query
 	 *

src/store/tasks.js

@@ -1038,6 +1038,12 @@ const actions = {
 		if (task.calendar.isSharedWithMe && task.class !== 'PUBLIC') {
 			return
 		}
+		// Don't complete a task if it is still recurring, but update its start date instead
+		if (task.recurring) {
+			task.completeRecurring()
+			await context.dispatch('updateTask', task)
+			return
+		}
 		if (task.completed) {
 			await context.dispatch('setPercentComplete', { task, complete: 0 })
 		} else {