249 lines
9.3 KiB
JavaScript
249 lines
9.3 KiB
JavaScript
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//@ts-check
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// ██
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// ██ ██ ██
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// ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██
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// ██ ██ ██ ██ ██ ██ ██ ██ ██
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// ██ ██ ██ ██ ██ ██ ██ ██ ██
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// ██ ██
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// ██
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(() => {
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const blank_pixel = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABAQMAAAAl21bKAAAAA1BMVEUAAACnej3aAAAAAXRSTlMAQObYZgAAAApJREFUCNdjYAAAAAIAAeIhvDMAAAAASUVORK5CYII="
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/** @param {any} s */
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const $ = s => document.querySelector(s)
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/** @param {string} s */
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const safe_url = s => {
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try {
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new URL(s)
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return true
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} catch (_) {
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return false
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}
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}
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/** @param {Blob} f */
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const file_url = f => new Promise((o, r) => {
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const reader = new FileReader()
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reader.onerror = e => r(e)
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reader.onload = () => o(reader.result)
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reader.readAsDataURL(f)
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})
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const
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/** @type {HTMLImageElement?} */ elemCanvas = $("#canvas"),
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/** @type {HTMLImageElement?} */ elemPreview = $("#preview"),
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/** @type {HTMLInputElement?} */ formFile = $("#form-file"),
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/** @type {HTMLInputElement?} */ formX = $("#form-x"),
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/** @type {HTMLInputElement?} */ formY = $("#form-y"),
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/** @type {HTMLInputElement?} */ formS = $("#form-s"),
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/** @type {HTMLInputElement?} */ formUserName = $("#form-username"),
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/** @type {HTMLInputElement?} */ formUserURL = $("#form-userurl"),
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/** @type {HTMLTextAreaElement?} */ formComment = $("#form-comment"),
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/** @type {HTMLParagraphElement?} */ formError = $("#form-error"),
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/** @type {HTMLButtonElement?} */ formSubmit = $("#form-submit"),
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/** @type {HTMLDivElement?} */ paneStickers = $(".pane-stickers"),
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/** @type {HTMLDivElement?} */ paneUploader = $(".pane-uploader"),
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/** @type {HTMLButtonElement?} */ buttonSwap = $("#pane-swap")
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let CANVAS_WIDTH = 854, CANVAS_HEIGHT = 480, CANVAS_STICKER_MAX_HEIGHT = 240, CANVAS_STICKER_MAX_HEIGHT_START = 160
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let scale = 1, ox = 0, oy = 0, iw = 0, ih = 0, click = false, busy = false, preview = false
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// Pane Swapping
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if (buttonSwap) buttonSwap.onclick = (() => {
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let viewUploader = false
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return () => {
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if (!paneStickers || !paneUploader) return
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if (viewUploader) {
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buttonSwap.textContent = "Create Sticker"
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paneStickers.removeAttribute("hidden")
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paneUploader.setAttribute("hidden", "true")
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canvas_clear()
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} else {
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buttonSwap.textContent = "Cancel"
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paneStickers.setAttribute("hidden", "true")
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paneUploader.removeAttribute("hidden")
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}
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viewUploader = !viewUploader
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}
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})()
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// Sticker Preview
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function preview_update() {
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if (!preview || !formS || !formY || !formX || !elemCanvas || !elemPreview) return
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let max = Math.floor((CANVAS_STICKER_MAX_HEIGHT / ih) * 100)
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if (max > 100) max = 100
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formS.max = String(max)
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formS.removeAttribute("disabled")
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formX.min = String(0 - Math.round(iw * scale))
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formX.max = String(elemCanvas.offsetWidth)
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formX.removeAttribute("disabled")
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formY.min = String(0 - Math.round(ih * scale))
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formY.max = String(elemCanvas.offsetHeight)
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formY.removeAttribute("disabled")
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elemPreview.style.opacity = "1"
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elemPreview.style.height = `${Math.round(ih * scale)}px`
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elemPreview.style.width = `${Math.round(iw * scale)}px`
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elemPreview.style.bottom = `${oy}px`
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elemPreview.style.left = `${ox}px`
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}
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if (formX) formX.oninput = () => {
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const e = formX, v = e.valueAsNumber
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if (isNaN(v)) return
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if (v < parseInt(e.min)) e.value = e.min
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if (v > parseInt(e.max)) e.value = e.max
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ox = e.valueAsNumber
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preview_update()
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}
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if (formY) formY.oninput = () => {
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const e = formY, v = e.valueAsNumber
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if (isNaN(v)) return
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if (v < parseInt(e.min)) e.value = e.min
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if (v > parseInt(e.max)) e.value = e.max
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oy = e.valueAsNumber
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preview_update()
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}
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if (formS) formS.oninput = () => {
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const e = formS, v = e.valueAsNumber
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if (isNaN(v)) return
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if (v < parseInt(e.min)) e.value = e.min
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if (v > parseInt(e.max)) e.value = e.max
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scale = e.valueAsNumber / 100
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preview_update()
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}
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if (formFile) formFile.onchange = async () => {
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if (!elemPreview || !formS || !formX || !formY) return
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const image = formFile.files?.item(0)
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if (!image) {
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elemPreview.style.opacity = "0"
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elemPreview.src = blank_pixel
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return
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}
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elemPreview.src = await file_url(image)
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elemPreview.onload = () => {
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iw = elemPreview.naturalWidth
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ih = elemPreview.naturalHeight
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if (ih > CANVAS_STICKER_MAX_HEIGHT_START) {
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scale = CANVAS_STICKER_MAX_HEIGHT_START / ih
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}
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ox = Math.round((CANVAS_WIDTH / 2) - ((iw * scale) / 2))
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oy = Math.round((CANVAS_HEIGHT / 2) - ((ih * scale / 2)))
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formS.valueAsNumber = Math.round(scale * 100)
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formX.valueAsNumber = ox
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formY.valueAsNumber = oy
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preview = true
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preview_update()
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}
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}
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/** @param {MouseEvent} ev */
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function preview_move(ev) {
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if (!preview || !formX || !formY || !elemPreview) return
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formX.valueAsNumber = ev.offsetX - Math.round((iw * scale) / 2)
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formY.valueAsNumber = CANVAS_HEIGHT - ev.offsetY - Math.round((ih * scale) / 2)
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if (formX.oninput) formX.oninput(ev)
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if (formY.oninput) formY.oninput(ev)
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}
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if (elemCanvas) {
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elemCanvas.onclick = preview_move
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document.onmouseup = () => { click = false }
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elemCanvas.onmousedown = () => { click = true }
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elemCanvas.onmousemove = e => { click && preview_move(e) }
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}
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// Sticker Forms
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function canvas_clear() {
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if (
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!formX || !formY || !formS || !formComment || !formUserName ||
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!formUserURL || !formFile || !elemPreview || !elemPreview || !formError
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) return
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for (const elem of [formX, formY, formS]) {
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elem.setAttribute("disabled", "true")
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elem.value = "0"
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}
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formS.value = "100"
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formComment.value = ""
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formUserName.value = ""
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formUserURL.value = ""
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formFile.value = ""
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elemPreview.style.opacity = "0"
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elemPreview.src = blank_pixel
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formError.textContent = "..."
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preview = false
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}
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if (formSubmit) formSubmit.onclick = async () => {
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if (
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busy || !formX || !formY || !formS || !elemCanvas || !formError ||
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!formFile || !formUserURL || !formUserName || !formComment
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) return
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busy = true
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try {
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// Sanity Checks
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// Comment, X, Y, and Scale already accounted for
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const image = formFile.files?.item(0)
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if (!image) {
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throw "Missing Sticker"
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}
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if (formUserURL.value && !safe_url(formUserURL.value)) {
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throw "Invalid URL"
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}
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// Generate Form Body
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const form = new FormData()
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form.append("sticker", image, "sticker")
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form.append("data", JSON.stringify({
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offset_x: formX.valueAsNumber,
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offset_y: formY.valueAsNumber,
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image_scale: formS.valueAsNumber,
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user_url: formUserURL.value,
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user_name: formUserName.value,
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message: formComment.value,
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}))
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// Send Image
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formError.textContent = "Uploading, please wait..."
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const resp = await fetch("/stickers", { method: "POST", body: form })
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if (resp.status !== 201) {
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throw `${resp.status}: ${await resp.text() || resp.statusText}`
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}
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formError.textContent = "Done! Refreshing..."
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window.location.reload()
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} catch (err) {
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console.error(err)
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formError.textContent = String(err)
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}
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busy = false
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}
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// Sticker Hovering
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document.querySelectorAll(".section-post").forEach(elem => {
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const x = parseInt(elem.getAttribute("data-offsetx") || "0")
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const y = parseInt(elem.getAttribute("data-offsety") || "0")
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const s = parseFloat(elem.getAttribute("data-scale") || "0")
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const h = parseInt(elem.getAttribute("data-height") || "0")
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const w = parseInt(elem.getAttribute("data-width") || "0")
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elem.addEventListener("mouseover", () => {
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if (elemPreview) {
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elemPreview.style.opacity = "1"
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elemPreview.style.height = `${Math.round(h * s)}px`
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elemPreview.style.width = `${Math.round(w * s)}px`
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elemPreview.style.bottom = `${y}px`
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elemPreview.style.left = `${x}px`
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}
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})
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elem.addEventListener("mouseout", () => {
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if (elemPreview) {
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elemPreview.style.opacity = "0"
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}
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})
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})
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})()
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