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twister_formatpost.js
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twister_formatpost.js
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// twister_formatpost.js
// 2013 Miguel Freitas
//
// Format JSON posts and DMs to HTML.
// format "userpost" to html element
// kind = "original"/"ancestor"/"descendant"
function postToElem( post, kind ) {
/*
"userpost" :
{
"n" : username,
"k" : seq number,
"t" : "post" / "dm" / "rt"
"msg" : message (post/rt)
"time" : unix utc
"height" : best height at user
"dm" : encrypted message (dm) -opt
"rt" : original userpost - opt
"sig_rt" : sig of rt - opt
"reply" : - opt
{
"n" : reference username
"k" : reference k
}
}
"sig_userpost" : signature by userpost.n
*/
// Obtain data from userpost
var postJson = $.toJSON(post);
var userpost = post["userpost"];
if( "rt" in userpost ) {
var rt = userpost["rt"];
var n = rt["n"];
var k = rt["k"];
var t = rt["time"];
var msg = rt["msg"];
var content_to_rt = $.toJSON(rt);
var content_to_sigrt = userpost["sig_rt"];
var retweeted_by = userpost["n"];
} else {
var n = userpost["n"];
var k = userpost["k"];
var t = userpost["time"];
var msg = userpost["msg"]
var content_to_rt = $.toJSON(userpost);
var content_to_sigrt = post["sig_userpost"];
var retweeted_by = undefined;
}
// Now create the html elements
var elem = $.MAL.getPostTemplate().clone(true);
elem.removeAttr('id');
elem.addClass(kind);
elem.attr('data-time', t);
var postData = elem.find(".post-data");
postData.addClass(kind);
postData.attr('data-userpost', postJson);
postData.attr('data-content_to_rt', content_to_rt);
postData.attr('data-content_to_sigrt', content_to_sigrt);
postData.attr('data-screen-name', n);
postData.attr('data-id', k);
postData.attr('data-text', msg);
if( "reply" in userpost ) {
postData.attr('data-replied-to-screen-name', userpost["reply"]["n"]);
postData.attr('data-replied-to-id', userpost["reply"]["k"]);
}
var postInfoName = elem.find(".post-info-name");
postInfoName.attr('href',$.MAL.userUrl(n));
postInfoName.text(n);
getFullname( n, postInfoName );
elem.find(".post-info-tag").text = "@" + n;
getAvatar( n, elem.find(".avatar") );
elem.find(".post-info-time").text(timeGmtToText(t));
elem.find(".post-info-time").attr("title",timeSincePost(t));
var mentions = [];
htmlFormatMsg( msg, elem.find(".post-text"), mentions);
postData.attr('data-text-mentions', mentions);
var replyTo = "";
if( n != defaultScreenName )
replyTo += "@" + n + " ";
for( var i = 0; i < mentions.length; i++ ) {
if( mentions[i] != n && mentions[i] != defaultScreenName ) {
replyTo += "@" + mentions[i] + " ";
}
}
elem.find(".post-area-new textarea").attr("placeholder", polyglot.t("reply_to", { fullname: replyTo })+ "...");
elem.find(".post-area-new textarea").attr("data-reply-to",replyTo);
postData.attr("data-reply-to",replyTo);
if( retweeted_by != undefined ) {
elem.find(".post-context").show();
var retweetedByElem = elem.find(".post-retransmited-by");
retweetedByElem.attr("href", $.MAL.userUrl(retweeted_by));
retweetedByElem.text(retweeted_by);
}
return elem;
}
// format dmdata (returned by getdirectmsgs) to display in "snippet" per user list
function dmDataToSnippetItem(dmData, remoteUser) {
var dmItem = $("#dm-snippet-template").clone(true);
dmItem.removeAttr('id');
dmItem.attr("data-dm-screen-name",remoteUser);
dmItem.attr("data-last_id", dmData.id);
dmItem.find(".post-info-tag").text("@" + remoteUser);
dmItem.find("a.post-info-name").attr("href", $.MAL.userUrl(remoteUser));
dmItem.find("a.dm-chat-link").attr("href", $.MAL.dmchatUrl(remoteUser));
getAvatar( remoteUser, dmItem.find(".post-photo").find("img") );
getFullname( remoteUser, dmItem.find("a.post-info-name") );
dmItem.find(".post-text").html(escapeHtmlEntities(dmData.text));
dmItem.find(".post-info-time").text(timeGmtToText(dmData.time));
dmItem.find(".post-info-time").attr("title",timeSincePost(dmData.time));
return dmItem;
}
// format dmdata (returned by getdirectmsgs) to display in conversation thread
function dmDataToConversationItem(dmData, localUser, remoteUser) {
var classDm = dmData.fromMe ? "sent" : "received";
var dmItem = $("#dm-chat-template").clone(true);
dmItem.removeAttr('id');
dmItem.addClass(classDm);
getAvatar(dmData.fromMe ? localUser : remoteUser, dmItem.find(".post-photo").find("img") );
dmItem.find(".post-info-time").text(timeGmtToText(dmData.time));
dmItem.find(".post-info-time").attr("title",timeSincePost(dmData.time));
var mentions = [];
htmlFormatMsg( dmData.text, dmItem.find(".post-text"), mentions);
return dmItem;
}
// convert message text to html, featuring @users and links formating.
// todo: hashtags
function htmlFormatMsg( msg, output, mentions ) {
var tmp;
var match = null;
var index;
var reAll = new RegExp("(#|@|http[s]?://)");
var reHttp = new RegExp("http[s]?://");
msg = escapeHtmlEntities(msg);
while( msg != undefined && msg.length ) {
match = reAll.exec(msg);
if( match ) {
if( match[0] == "@" ) {
output.append(msg.substr(0, match.index));
tmp = msg.substr(match.index+1);
var username = _extractUsername(tmp);
if( username.length ) {
if( mentions.indexOf(username) < 0 )
mentions.push(username);
var userLinkTemplate = $("#msg-user-link-template").clone(true);
userLinkTemplate.removeAttr("id");
userLinkTemplate.attr("href",$.MAL.userUrl(username));
userLinkTemplate.text("@"+username);
output.append(userLinkTemplate);
msg = tmp.substr(String(username).length);
continue;
}
}
if( reHttp.exec(match[0]) ) {
output.append(msg.substr(0, match.index));
tmp = msg.substring(match.index);
var space = tmp.indexOf(" ");
var url;
if( space != -1 ) url = tmp.substring(0,space); else url = tmp;
if( url.length ) {
var extLinkTemplate = $("#external-page-link-template").clone(true);
extLinkTemplate.removeAttr("id");
extLinkTemplate.attr("href",url);
extLinkTemplate.text(url);
extLinkTemplate.attr("title",url);
output.append(extLinkTemplate);
msg = tmp.substr(String(url).length);
continue;
}
}
if( match[0] == "#" ) {
output.append(msg.substr(0, match.index));
tmp = msg.substr(match.index+1);
var hashtag = _extractUsername(tmp);
if( hashtag.length ) {
var hashtagLinkTemplate = $("#hashtag-link-template").clone(true);
hashtagLinkTemplate.removeAttr("id");
hashtagLinkTemplate.attr("href",$.MAL.hashtagUrl(hashtag));
hashtagLinkTemplate.text("#"+hashtag);
output.append(hashtagLinkTemplate);
msg = tmp.substr(String(hashtag).length);
continue;
}
}
}
output.append(msg);
msg = "";
}
}
// internal function for htmlFormatMsg
function _extractUsername(s) {
var username = "";
for( var i = 0; i < s.length; i++ ) {
var c = s.charCodeAt(i);
if( (c >= 'a'.charCodeAt(0) && c <= 'z'.charCodeAt(0)) ||
(c >= 'A'.charCodeAt(0) && c <= 'Z'.charCodeAt(0)) ||
(c >= '0'.charCodeAt(0) && c <= '9'.charCodeAt(0)) ||
c == '_'.charCodeAt(0) ) {
username += s[i];
} else {
break;
}
}
return username.toLowerCase();
}
function escapeHtmlEntities(str) {
return str.replace(/&/g, '&').replace(/</g, '<').replace(/>/g, '>').replace(/"/g, '"').replace(/'/g, ''');
}