deferThisInstance.omnifocusjs

/* global PlugIn duplicateTasks */
/*{
"type": "action",
"targets": ["omnifocus"],
"author": "Kaitlin Salzke",
"identifier": "com.KaitlinSalzke.DeferThisInstance",
"version": "1.2",
"description": "Duplicates a repeating task to modify its defer date without affecting future instances",
"label": "Defer This Instance",
"shortLabel": "Defer This Instance",
"image": "arrow.forward.square.fill"
}*/
(() => {
  const action = new PlugIn.Action(async (selection, sender) => {
    const oTask = selection.tasks[0] || selection.projects[0].task

    // prompt for new defer date
    const form = new Form()
    form.addField(new Form.Field.Date('deferDate', 'New Defer Date', null, null))
    await form.show('Defer Until...', 'OK')

    // make a non-repeating copy of the task
    const nTask = oTask.project === null ? duplicateTasks([oTask], oTask.before)[0] : duplicateSections([oTask.project], oTask.project.before)[0].task

    nTask.repetitionRule = null
    nTask.deferDate = form.values.deferDate

    // skip the original task
    oTask.drop(false)
  })

  action.validate = (selection, sender) => {
    // available if a single repeating task is selected
    const selected = [...selection.tasks, ...selection.projects.map(p => p.task)]

    return selected.length === 1 && selected[0].repetitionRule !== null
  }

  return action
})()