diff options
Diffstat (limited to 'themes/alps/assets/compose.js')
-rw-r--r-- | themes/alps/assets/compose.js | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/themes/alps/assets/compose.js b/themes/alps/assets/compose.js new file mode 100644 index 0000000..e6f057f --- /dev/null +++ b/themes/alps/assets/compose.js @@ -0,0 +1,196 @@ +const composeForm = document.getElementById("compose-form"); +const sendProgress = document.getElementById("send-progress"); +composeForm.addEventListener("submit", ev => { + [...document.querySelectorAll("input, textarea")].map( + i => i.setAttribute("readonly", "readonly")); + sendProgress.style.display = 'flex'; +}); + +let attachments = []; + +const headers = document.querySelector(".create-update .headers"); +headers.classList.remove("no-js"); + +const attachmentsNode = document.getElementById("attachment-list"); +attachmentsNode.style.display = ''; +const helpNode = attachmentsNode.querySelector(".help"); + +const attachmentsInput = headers.querySelector("input[type='file']"); +attachmentsInput.removeAttribute("name"); +attachmentsInput.addEventListener("input", ev => { + const files = attachmentsInput.files; + for (let i = 0; i < files.length; i++) { + attachFile(files[i]); + } +}); + +window.addEventListener("dragenter", dragNOP); +window.addEventListener("dragleave", dragNOP); +window.addEventListener("dragover", dragNOP); + +window.addEventListener("drop", ev => { + ev.preventDefault(); + const files = ev.dataTransfer.files; + for (let i = 0; i < files.length; i++) { + attachFile(files[i]); + } +}); + +function dragNOP(e) { + e.stopPropagation(); + e.preventDefault(); +} + +const sendButton = document.getElementById("send-button"), + saveButton = document.getElementById("save-button"); + +const attachmentUUIDsNode = document.getElementById("attachment-uuids"); +function updateState() { + let complete = true; + for (let i = 0; i < attachments.length; i++) { + const a = attachments[i]; + const progress = a.node.querySelector(".progress"); + progress.style.width = `${Math.floor(a.progress * 100)}%`; + complete &= a.progress === 1.0; + if (a.progress === 1.0) { + progress.style.display = 'none'; + } + } + + if (complete) { + sendButton.removeAttribute("disabled"); + saveButton.removeAttribute("disabled"); + } else { + sendButton.setAttribute("disabled", "disabled"); + saveButton.setAttribute("disabled", "disabled"); + } + + attachmentUUIDsNode.value = attachments. + filter(a => a.progress === 1.0). + map(a => a.uuid). + join(","); +} + +function attachFile(file) { + helpNode.remove(); + + const xhr = new XMLHttpRequest(); + const node = attachmentNodeFor(file); + const attachment = { + node: node, + progress: 0, + xhr: xhr, + }; + attachments.push(attachment); + attachmentsNode.appendChild(node); + node.querySelector("button").addEventListener("click", ev => { + attachment.xhr.abort(); + attachments = attachments.filter(a => a !== attachment); + node.remove(); + updateState(); + + if (typeof attachment.uuid !== "undefined") { + const cancel = new XMLHttpRequest(); + cancel.open("POST", `/compose/attachment/${attachment.uuid}/remove`); + cancel.send(); + } + }); + + let formData = new FormData(); + formData.append("attachments", file); + + const handleError = msg => { + attachments = attachments.filter(a => a !== attachment); + node.classList.add("error"); + node.querySelector(".progress").remove(); + node.querySelector(".size").remove(); + node.querySelector("button").remove(); + node.querySelector(".error").innerText = "Error: " + msg; + updateState(); + }; + + xhr.open("POST", "/compose/attachment"); + xhr.upload.addEventListener("progress", ev => { + attachment.progress = ev.loaded / ev.total; + updateState(); + }); + xhr.addEventListener("load", () => { + let resp; + try { + resp = JSON.parse(xhr.responseText); + } catch { + resp = { "error": "Error: invalid response" }; + } + + if (xhr.status !== 200) { + handleError(resp["error"]); + return; + } + + attachment.uuid = resp[0]; + updateState(); + }); + xhr.addEventListener("error", () => { + handleError("an unexpected problem occured"); + }); + xhr.send(formData); + + updateState(); +} + +function attachmentNodeFor(file) { + const node = document.createElement("div"), + progress = document.createElement("span"), + filename = document.createElement("span"), + error = document.createElement("span"), + size = document.createElement("span"), + button = document.createElement("button"); + node.classList.add("upload"); + + progress.classList.add("progress"); + node.appendChild(progress); + + filename.classList.add("filename"); + filename.innerText = file.name; + node.appendChild(filename); + + error.classList.add("error"); + node.appendChild(error); + + size.classList.add("size"); + size.innerText = formatSI(file.size) + "B"; + node.appendChild(size); + + button.innerHTML = "×"; + node.appendChild(button); + return node; +} + +// via https://github.com/ThomWright/format-si-prefix; MIT license +// Copyright (c) 2015 Thom Wright +const PREFIXES = { + '24': 'Y', '21': 'Z', '18': 'E', '15': 'P', '12': 'T', '9': 'G', '6': 'M', + '3': 'k', '0': '', '-3': 'm', '-6': 'ยต', '-9': 'n', '-12': 'p', '-15': 'f', + '-18': 'a', '-21': 'z', '-24': 'y' +}; + +function formatSI(num) { + if (num === 0) { + return '0'; + } + let sig = Math.abs(num); // significand + let exponent = 0; + while (sig >= 1000 && exponent < 24) { + sig /= 1000; + exponent += 3; + } + while (sig < 1 && exponent > -24) { + sig *= 1000; + exponent -= 3; + } + const signPrefix = num < 0 ? '-' : ''; + if (sig > 1000) { + return signPrefix + sig.toFixed(0) + PREFIXES[exponent]; + } + return signPrefix + parseFloat(sig.toPrecision(3)) + PREFIXES[exponent]; +} |