nntpchan/contrib/static/overchan.js

var _onreadyfuncs = [];

function onready(f) {
    _onreadyfuncs.push(function() {f();});
}

function ready() {
    for(var idx = 0; idx < _onreadyfuncs.length; idx++) _onreadyfuncs[idx]();
}


function quickreply(shorthash, longhash, url) {
    if (!window.location.pathname.startsWith("/t/"))
    {
        window.location.href = url;
        return;
    }
    var elem = document.getElementById("comment");
    if(!elem) return;
    elem.value += ">>" + shorthash + "\n";
}

function get_storage() {
    var st = null;
    if (window.localStorage) {
        st = window.localStorage;
    } else if (localStorage) {
        st = localStorage;
    }
    return st;
}



// rewrite all images to add inline expand
onready(function() {

    // is the filename matching an image?
    var filenameIsImage = function(fname) {
        return /\.(gif|jpeg|jpg|png|webp)/.test(fname.toLowerCase());
    };

    // setup image inlining for 1 element
    var setupInlineImage = function(thumb, url) {
        if(thumb.inlineIsSetUp) return;
        thumb.inlineIsSetUp = true;
        var img = thumb.querySelector("img.image");
        var expanded = false;
        var oldurl = img.src;
        thumb.onclick = function() {
            if (expanded) {
                img.setAttribute("class", "image");
                img.src = oldurl;
                expanded = false;
            } else {
                img.setAttribute("class", "expanded-thumbnail");
                img.src = url;
                expanded = true;
            }
            return false;
        };
    };

    // set up image inlining for all applicable children in an element
    var setupInlineImageIn = function(element) {
        var thumbs = element.querySelectorAll("a.image_link");
        for ( var i = 0 ; i < thumbs.length ; i++ ) {
            var url = thumbs[i].href;
            if (filenameIsImage(url)) {
                // match
                setupInlineImage(thumbs[i], url);
            }
        }
    };
    // Setup Javascript events for document
    setupInlineImageIn(document);

    // Setup Javascript events via updater
    if (window.MutationObserver) {
        var observer = new MutationObserver(function(mutations) {
            for (var i = 0; i < mutations.length; i++) {
                var additions = mutations[i].addedNodes;
                if (additions == null) continue;
                for (var j = 0; j < additions.length; j++) {
                    var node = additions[j];
                    if (node.nodeType == 1) {
                        setupInlineImageIn(node);
                    }
                }
            }
        });
        observer.observe(document.body, {childList: true, subtree: true});
    }
});

// set up post hider
onready(function() {

    var get_hidden_posts = function() {
        var st = get_storage();
        var prefix = "nntpchan_hide_post_";
        return  {
            all : function() {
                var msgids = [];
                for ( var k in st) {
                    if (k.indexOf(prefix) == 0) {
                        var m = k.substring(prefix.length);
                        msgids.push(m);
                    }
                }
                return msgids;
            },

            add : function (msg) {
                st[prefix+msg] = "post";
            },

            del : function (msg) {
                st.removeItem(prefix+msg);
            }
        };
    };


    // is a post elem an OP?
    var postIsOP = function(elem) {
        var ds = elem.dataset;
        return ds && ds.rootmsgid == ds.msgid ;
    };

    var hide_elem = function(elem, fade) {
        if (elem.style) {
            elem.style.display = "none";
        } else {
            elem.style = {display: "none" };
        }
        elem.dataset.userhide = "yes";
    };

    var unhide_elem = function(elem) {
        elem.style = "";
        elem.dataset.userhide = "no";
    };

    // return true if element is hidden
    var elemIsHidden = function(elem) {
        return elem.dataset && elem.dataset.userhide == "yes";
    };

    // hide a post
    var hidepost = function(elem, nofade) {
        console.log("hidepost("+elem.dataset.msgid+")");
        var posts = get_hidden_posts();
        if (posts) {
            // add to persitant hide
            posts.add(elem.dataset.msgidhash);
        }
        if(postIsOP(elem)) {
            // hide thread it's an OP
            var thread = document.getElementById("thread_"+elem.dataset.rootmsgidhash);
            if (thread) {
                var e = thread.getElementsByClassName("post");
                for ( var idx = 0; idx < e.length ; idx ++ ) {
                    if (e[idx].dataset.msgid == elem.dataset.msgid) continue; // don't apply
                    hidepost(e[idx]);
                }
            }
        }
        // hide attachments and post body
        var es = elem.getElementsByClassName("image");
        for (var idx = 0; idx < es.length ; idx ++ ) {
            hide_elem(es[idx]);
        }
        es = elem.getElementsByClassName("message_span");
        for (var idx = 0; idx < es.length ; idx ++ ) {
            hide_elem(es[idx]);
        }
        elem.dataset.userhide = "yes";
        elem.setHideLabel("[show]");
    };

    // unhide a post
    var unhidepost = function(elem) {
        console.log("unhidepost("+elem.dataset.msgid+")");
        var posts = get_hidden_posts();
        if (posts) {
            // remove from persiting hide
            posts.del(elem.dataset.msgidhash);
        }
        if(postIsOP(elem)) {
            var thread = document.getElementById("thread_"+elem.dataset.rootmsgidhash);
            if(thread) {
                var e = thread.getElementsByClassName("post");
                for ( var idx = 0; idx < e.length ; idx ++ ) {
                    if(e[idx].dataset.msgid == elem.dataset.msgid) continue;
                    unhidepost(e[idx]);
                }
            }
        }
        // unhide attachments and post body
        var es = elem.getElementsByClassName("image");
        for (var idx = 0; idx < es.length ; idx ++ ) {
            unhide_elem(es[idx]);
        }
        es = elem.getElementsByClassName("message_span");
        for (var idx = 0; idx < es.length ; idx ++ ) {
            unhide_elem(es[idx]);
        }
        elem.dataset.userhide = "no";
        elem.setHideLabel("[hide]");
    };

    // hide a post given a callback that checks each post
    var hideposts = function(check_func) {
        var es = document.getElementsByClassName("post");
        for ( var idx = 0; idx < es.length ; idx ++ ) {
            var elem = es[idx];
            if(check_func && elem && check_func(elem)) {
                hidepost(elem);
            }
        }
    };

    // unhide all posts given callback
    // if callback is null unhide all
    var unhideall = function(check_func) {
        var es = document.getElementsByClassName("post");
        for (var idx=0 ; idx < es.length; idx ++ ) {
            var elem = es[idx];
            if(!check_func) { unhide(elem); }
            else if(check_func(elem)) { unhide(elem); }
        }
    };

    // inject posthide into page

    var posts = document.getElementsByClassName("post");
    for (var idx = 0 ; idx < posts.length; idx++ ) {
        var inject = function (elem) {
            var hider = document.createElement("a");
            hider.setAttribute("class", "hider");
            elem.setHideLabel = function (txt) {
                var e_hider = hider;
                e_hider.innerHTML = txt;
            };
            elem.hidepost = function() {
                var e_self = elem;
                var e_hider = hider;
                hidepost(e_self);
            };
            elem.unhidepost = function() {
                var e_self = elem;
                var e_hider = hider;
                unhidepost(e_self);
            };
            elem.isHiding = function() {
                var e_self = elem;
                return elemIsHidden(e_self);
            };
            hider.appendChild(document.createTextNode("[hide]"));
            hider.onclick = function() {
                var e_self = elem;
                if(e_self.isHiding()) {
                    e_self.unhidepost();
                } else {
                    e_self.hidepost();
                }
            };
            elem.appendChild(hider);
        };
        inject(posts[idx]);
    }
    // apply persiting hidden posts
    posts = get_hidden_posts();
    if(posts) {
        var all = posts.all();
        for ( var idx = 0 ; idx < all.length; idx ++ ) {
            var id = all[idx];
            var elem = document.getElementById(id);
            if(elem)
                hidepost(elem, true);
        }
    }
});