114 lines
3.3 KiB
JavaScript
114 lines
3.3 KiB
JavaScript
"use strict";
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const $ = require("jquery");
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const socket = require("../socket");
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const render = require("../render");
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const condensed = require("../condensed");
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const chat = $("#chat");
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socket.on("more", function(data) {
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let chan = chat.find("#chan-" + data.chan);
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const type = chan.data("type");
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chan = chan.find(".messages");
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// get the scrollable wrapper around messages
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const scrollable = chan.closest(".chat");
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const heightOld = chan.height() - scrollable.scrollTop();
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// If there are no more messages to show, just hide the button and do nothing else
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if (!data.messages.length) {
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scrollable.find(".show-more").removeClass("show");
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return;
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}
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// Remove the date-change marker we put at the top, because it may
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// not actually be a date change now
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const children = $(chan).children();
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if (children.eq(0).hasClass("date-marker-container")) { // Check top most child
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children.eq(0).remove();
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} else if (children.eq(1).hasClass("date-marker-container")) {
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// The unread-marker could be at index 0, which will cause the date-marker to become "stuck"
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children.eq(1).remove();
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} else if (children.eq(0).hasClass("condensed") && children.eq(0).children(".date-marker-container").eq(0).hasClass("date-marker-container")) {
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children.eq(0).children(".date-marker-container").eq(0).remove();
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}
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// Add the older messages
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const documentFragment = render.buildChannelMessages($(document.createDocumentFragment()), data.chan, type, data.messages);
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chan.prepend(documentFragment);
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// Move unread marker to correct spot if needed
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const unreadMarker = chan.find(".unread-marker");
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const firstUnread = unreadMarker.data("unread-id");
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if (firstUnread > 0) {
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let first = chan.find("#msg-" + firstUnread);
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if (!first.length) {
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chan.prepend(unreadMarker);
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} else {
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const parent = first.parent();
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if (parent.hasClass("condensed")) {
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first = parent;
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}
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unreadMarker.data("unread-id", 0);
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first.before(unreadMarker);
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}
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}
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// Join duplicate condensed messages together
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const condensedDuplicate = chan.find(".msg.condensed + .msg.condensed");
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if (condensedDuplicate) {
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const condensedCorrect = condensedDuplicate.prev();
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condensed.updateText(condensedCorrect, condensed.getStoredTypes(condensedDuplicate));
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condensedCorrect
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.append(condensedDuplicate.find(".msg"))
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.toggleClass("closed", condensedDuplicate.hasClass("closed"));
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condensedDuplicate.remove();
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}
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// restore scroll position
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const position = chan.height() - heightOld;
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scrollable.finish().scrollTop(position);
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// We have to do this hack due to smooth scrolling in browsers,
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// as scrollTop does not apply correctly
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if (window.requestAnimationFrame) {
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window.requestAnimationFrame(() => scrollable.scrollTop(position));
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}
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if (data.messages.length !== 100) {
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scrollable.find(".show-more").removeClass("show");
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}
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scrollable.find(".show-more-button")
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.text("Show older messages")
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.prop("disabled", false);
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});
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chat.on("click", ".show-more-button", function() {
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const self = $(this);
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const lastMessage = self.closest(".chat").find(".msg:not(.condensed)").first();
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let lastMessageId = -1;
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if (lastMessage.length > 0) {
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lastMessageId = parseInt(lastMessage.attr("id").replace("msg-", ""), 10);
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}
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self
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.text("Loading older messages…")
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.prop("disabled", true);
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socket.emit("more", {
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target: self.data("id"),
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lastId: lastMessageId,
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});
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});
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