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nntpchan/contrib/js/backlink.js
2016-05-01 18:04:43 -04:00

407 lines
11 KiB
JavaScript

var dynreply;
function getReplyTo() {
if(!dynreply) {
var e = document.getElementById("postform_container");
if (e) {
// use existing postform
dynreply = new DynReply(e);
} else {
// build a new postform
dynreply = new DynReply();
}
}
return dynreply;
}
function table_insert_row(table, header, items) {
var tr = document.createElement("tr");
// insert header element
var th = document.createElement("th");
th.appendChild(header);
tr.appendChild(th);
// insert the rest of the elements
for (var idx = 0; idx < items.length; idx ++ ) {
var elem = document.createElement("td");
elem.appendChild(items[idx]);
tr.appendChild(elem);
}
table.appendChild(tr);
}
/**
build dynamic reply box
*/
function DynReply(existingElem) {
if (existingElem) {
// wrap existing post form
this.elem = existingElem;
this.form = this.elem.querySelector("form");
this._error = document.getElementById("postform_msg");
this.url = this.form.action + "?t=json";
return;
}
// build new post form
var elem = document.createElement("div");
elem.setAttribute("id", "postform_container");
this.elem = elem;
// build post form
this.form = document.createElement("form");
this.form.enctype = "multipart/form-data";
this.form.name = "post";
this.form.method = "post";
// reference
elem = document.createElement("input");
elem.setAttribute("id", "postform_reference");
elem.name = "reference";
elem.type = "hidden";
this.form.appendChild(elem);
var table = document.createElement("table");
table.setAttribute("class", "postform");
var tbody = document.createElement("tbody");
// name
elem = document.createElement("input");
elem.setAttribute("name", "name");
elem.setAttribute("value", "Anonymous");
elem.setAttribute("id", "postform_name");
var err_elem = document.createElement("span");
err_elem.setAttribute("id", "postform_msg");
this._error = err_elem;
table_insert_row(tbody, document.createTextNode("Name"), [elem, err_elem])
// subject
elem = document.createElement("input");
elem.setAttribute("name", "subject");
elem.setAttribute("value", "");
elem.setAttribute("id", "postform_subject");
// submit
var submit = document.createElement("input");
submit.setAttribute("value", "reply");
submit.setAttribute("class", "button");
submit.setAttribute("type", "submit");
submit.setAttribute("id", "postform_submit");
table_insert_row(tbody, document.createTextNode("Subject"), [elem, submit]);
// Comment
elem = document.createElement("textarea");
elem.setAttribute("id", "postform_message");
elem.setAttribute("name", "message");
elem.setAttribute("cols", "40");
elem.setAttribute("rows", "5");
table_insert_row(tbody, document.createTextNode("Comment"), [elem]);
// file
elem = document.createElement("input");
elem.setAttribute("class", "postform_attachment");
elem.setAttribute("id", "postform_attachments");
elem.setAttribute("type", "file");
elem.setAttribute("name", "attachment_uploaded");
elem.setAttribute("multiple", "multiple");
table_insert_row(tbody, document.createTextNode("Files"), [elem]);
// dubs
elem = document.createElement("input");
elem.setAttribute("type", "checkbox");
elem.setAttribute("name", "dubs");
table_insert_row(tbody, document.createTextNode("Get Dubs"), [elem]);
// captcha
elem = document.createElement("img");
elem.setAttribute("id", "captcha_img");
elem.alt = "captcha";
table_insert_row(tbody, document.createTextNode("Captcha"), [elem]);
// captcha solution
elem = document.createElement("input");
elem.name = "captcha";
elem.autocomplete = "off";
elem.setAttribute("id", "captcha_solution");
table_insert_row(tbody, document.createTextNode("Solution"), [elem])
table.appendChild(tbody);
this.form.appendChild(table);
this.elem.appendChild(this.form);
document.body.appendChild(this.elem);
this.board = null;
this.roothash = null;
this.prefix = null;
this.url = null;
}
DynReply.prototype.moveTo = function(x,y) {
x = window.screenX - x ;
this.elem.setAttribute("style", "top: "+y+"px; right: "+x+"px;");
}
DynReply.prototype.update = function() {
if (this.prefix) {
// update captcha
this.updateCaptcha();
if (this.board && this.roothash) {
// update post form
var ref = document.getElementById("postform_reference");
ref.setAttribute("value", this.roothash);
this.url = this.prefix + "post/" + this.board + "?t=json";
}
}
}
DynReply.prototype.show = function() {
console.log("show dynreply");
this.update();
this.elem.style.display = 'inline';
}
DynReply.prototype.hide = function() {
console.log("hide dynreply");
this.elem.style.display = "none";
}
// clear all fields
DynReply.prototype.clear = function() {
this.clearSolution();
this.clearPostbox();
}
// clear captcha solution
DynReply.prototype.clearSolution = function() {
var e = document.getElementById("captcha_solution");
// reset value
e.value = "";
}
// clear postform elements
DynReply.prototype.clearPostbox = function() {
var e = document.getElementById("postform_subject");
e.value = "";
e = document.getElementById("postform_message");
e.value = "";
e = document.getElementById("postform_attachments");
e.value = null;
}
DynReply.prototype.post = function(cb, err_cb) {
if (this.url && this.form) {
var data = new FormData(this.form);
var ajax = new XMLHttpRequest();
ajax.onreadystatechange = function(ev) {
if (ajax.readyState == XMLHttpRequest.DONE) {
var j = null;
try {
j = JSON.parse(ajax.responseText);
cb(j);
} catch (e) {
if(err_cb) {
err_cb(e);
}
}
}
}
ajax.open("POST", this.url);
ajax.send(data);
}
}
DynReply.prototype.updateCaptcha = function() {
if (this.prefix) {
var captcha_img = document.getElementById("captcha_img");
captcha_img.src = this.prefix + "captcha/img";
}
this.clearSolution();
}
DynReply.prototype.setPrefix = function(prefix) {
this.prefix = prefix;
}
DynReply.prototype.hide = function() {
this.elem.style.display = 'none';
}
DynReply.prototype.setBoard = function(boardname) {
if (boardname) {
this.board = boardname;
}
}
DynReply.prototype.setRoot = function(roothash) {
if (roothash) {
this.roothash = roothash;
}
}
DynReply.prototype.showError = function(msg) {
console.log("error in dynreply: "+msg);
this._error.setAttribute("class", "error");
this._error.appendChild(document.createTextNode(msg));
this.updateCaptcha();
}
DynReply.prototype.showMessage = function(msg) {
this._error.setAttribute("class", "message");
this._error.innerHTML = "";
this._error.appendChild(document.createTextNode(msg));
var e = this._error;
setTimeout(function() {
// clear it
e.innerHTML = "";
}, 2000);
}
// reply box function
function nntpchan_reply(parent, shorthash) {
if (parent) {
var boardname = parent.getAttribute("boardname");
var roothash = parent.getAttribute("root");
var replyto = getReplyTo();
// set target
replyto.setBoard(boardname);
replyto.setRoot(roothash);
// show it
replyto.show();
}
var elem = document.getElementById("postform_message");
if ( elem )
{
elem.value += ">>" + shorthash.substr(0,10) + "\n";
}
}
// inject post hover behavior
function inject_hover(prefix, el, parent) {
if (!prefix) { throw "prefix is not defined"; }
var linkhash = el.getAttribute("backlinkhash");
if (!linkhash) { throw "linkhash undefined"; }
console.log("rewrite linkhash "+linkhash);
var elem = document.createElement("span");
elem.setAttribute("class", "backlink_rewritten");
elem.appendChild(document.createTextNode(">>"+linkhash.substr(0,10)));
if (!parent) {
parent = el.parentNode;
}
parent.removeChild(el);
parent.appendChild(elem);
elem.onclick = function(ev) {
if(parent.backlink) {
nntpchan_apicall(prefix+"api/find?hash="+linkhash, function(j) {
var wrapper = document.createElement("div");
wrapper.setAttribute("class", "hover "+linkhash);
if (j == null) {
// not found?
wrapper.setAttribute("class", "hover notfound-hover "+linkhash);
wrapper.appendChild(document.createTextNode("not found"));
} else {
// wrap backlink
nntpchan_buildpost(wrapper, j);
}
parent.appendChild(wrapper);
parent.backlink = false;
}, function(msg) {
var wrapper = document.createElement("div");
wrapper.setAttribute("class", "hover "+linkhash);
wrapper.appendChild(document.createTextNode(msg));
parent.appendChild(wrapper);
parent.backlink = false;
});
} else {
var elems = document.getElementsByClassName(linkhash);
if (!elems) throw "bad state, no backlinks open?";
for (var idx = 0 ; idx < elems.length; idx ++ ) {
elems[idx].parentNode.removeChild(elems[idx]);
}
parent.backlink = true;
}
};
parent.backlink = true;
}
// inject post hover for all backlinks in an element
function inject_hover_for_element(elem) {
var elems = elem.getElementsByClassName("backlink");
var ls = [];
var l = elems.length;
for ( var idx = 0 ; idx < l ; idx ++ ) {
var e = elems[idx];
ls.push(e);
}
for( var elem in ls ) {
inject_hover(prefix, ls[elem]);
}
}
function init(prefix) {
// inject posthover ...
inject_hover_for_element(document);
// initialize replyto widget
var rpl = getReplyTo();
rpl.setPrefix(prefix);
// position replyto widget
var e = rpl.elem;
e.setAttribute("draggable", "true");
var mouseDownX, mouseDownY;
var originalX = window.screenX - 150;
var originalY = 10;
rpl.moveTo(originalX, originalY);
e.addEventListener("dragstart", function(ev) {
mouseDownX = ev.clientX;
mouseDownY = ev.clientY;
if (!ev.ctrlKey) {
ev.preventDefault();
}
}, false);
e.addEventListener("dragend", function(ev) {
var x = originalX + ev.clientX - mouseDownX;
var y = originalY + ev.clientY - mouseDownY;
x -= window.screenLeft;
y -= window.screenTop;
rpl.moveTo(x, y);
originalX = x;
originalY = y;
}, false);
// add replyto post handlers
e = document.getElementById("postform_submit");
var postit = function() {
var f = document.querySelector("form");
// do ajax request to post data
var r = getReplyTo();
r.showMessage("posting... ");
r.post(function(j) {
if(j.error) {
// an error happened
r.showError(j.error);
} else {
// we're good
r.showMessage("posted :^)");
r.updateCaptcha();
r.clear();
}
}, function(err) {
r.showError(err);
r.clearSolution();
});
}
var f = document.querySelector("form");
f.onsubmit = function() {
postit();
return false;
}
}