// ==UserScript==
// @name         Piazza - Archive with Delete Key
// @namespace    https://openuserjs.org/users/zachhardesty7
// @author       Zach Hardesty <[email protected]> (https://github.com/zachhardesty7)
// @description  bind the delete key to quickly archive posts
// @copyright    2019, Zach Hardesty (https://zachhardesty.com/)
// @license      GPL-3.0-only; http://www.gnu.org/licenses/gpl-3.0.txt
// @version      2.3.3
// @homepageURL  https://github.com/zachhardesty7/tamper-monkey-scripts-collection/raw/master/piazza-archive-with-delete-key.user.js
// @homepageURL  https://openuserjs.org/scripts/zachhardesty7/Piazza_-_Archive_with_Delete_Key
// @supportURL   https://github.com/zachhardesty7/tamper-monkey-scripts-collection/issues
// @include      https://piazza.com/class/*
// ==/UserScript==
/* global P */
// TODO: add undo shortcut
// let lastDeletedItemId
let lastMovement = "down" // or 'up'
/**
* ret prev item in cur week if exists or back up and move to prev week to get last item
*
* @see {getNextItem}
* @param {Element} el - target
* @returns {?HTMLElement} r###lt
*/
const getPrevItem = (el) => {
if (el.previousElementSibling) return el.previousElementSibling
let parent = el.parentElement.parentElement.previousElementSibling
while (parent) {
if (parent.lastElementChild && parent.lastElementChild.lastElementChild) {
return parent.lastElementChild.lastElementChild
}
parent = parent.previousElementSibling
}
// must be at start of posts so force get next
const item = getNextItem(el)
if (!item) throw new Error("cannot find any other posts") // prevent inf loop
return item
}
/**
* ret next item in cur week if exists or back up and move to next week to get first item
*
* @param {Element} el - target
* @returns {?HTMLElement} r###lt
*/
const getNextItem = (el) => {
// sibling from same week
if (el.nextElementSibling) return el.nextElementSibling
// back up element to week div and select next week
let parent = el.parentElement.parentElement.nextElementSibling
// return first proceeding week with a post in it
while (parent) {
if (parent.lastElementChild && parent.lastElementChild.firstElementChild) {
return parent.lastElementChild.firstElementChild
}
parent = parent.nextElementSibling // update to next week
}
// must be at end of posts so force get prev
const item = getPrevItem(el)
if (!item) throw new Error("cannot find any other posts") // prevent inf loop
return item
}
/**
* navigate posts on key press
*
* @param {KeyboardEvent} e - keydown event
*/
const onKeydownHandler = (e) => {
// move to prev feed item
if (e.key === "ArrowLeft" || e.key === "ArrowUp") {
const prevItem = getPrevItem(document.querySelector(".feed_item.selected"))
prevItem && prevItem.click()
lastMovement = "up"
}
// move to next feed item
if (e.key === "ArrowRight" || e.key === "ArrowDown") {
const nextItem = getNextItem(document.querySelector(".feed_item.selected"))
nextItem && nextItem.click()
lastMovement = "down"
}
// del & move to next feed item
if (e.key === "Delete") {
const item = document.querySelector(".feed_item.selected")
const newItem =
lastMovement === "up" // change view
? getPrevItem(item)
: getNextItem(item)
newItem && newItem.click()
// lastDeletedItemId = (item.id)
P.feed.delFeedItem(item.id)
}
// FIXME: cannot read property 'remove' of null
// if (e.key === 'z' && e.ctrlKey) {
//   if (lastDeletedItemId) {
//     P.feed.addFeedItem(lastDeletedItemId)
//   }
// }
}
// update direction of last movement direction for each click
document.addEventListener("click", (e) => {
let clickedPost = /** @type {HTMLElement} */ (e.target)
// traverse up html until the post item is found or `null`
while (clickedPost && !clickedPost.className.includes("feed_item")) {
clickedPost = clickedPost.parentElement
}
if (clickedPost) {
const selected = document.querySelector(".feed_item.selected")
// id of week the post is in
const bucketClicked = clickedPost.parentElement.id
const bucketSelected = selected.parentElement.id
if (bucketClicked > bucketSelected) lastMovement = "down"
else if (bucketClicked < bucketSelected) lastMovement = "up"
else {
// posts in the same week
// get position within the week
const positionClicked = [...clickedPost.parentElement.children].indexOf(
clickedPost
)
const positionSelected = [...selected.parentElement.children].indexOf(
selected
)
if (positionClicked < positionSelected) lastMovement = "up"
else if (positionClicked > positionSelected) lastMovement = "down"
else {
/* don't update lastMovement if already selected item is clicked */
}
}
}
})
document.addEventListener("keydown", onKeydownHandler)