Rebuild workspace widgets and behavioral graph views

core/static/js/compose-panel-thread.js

@@ -18,6 +18,7 @@
     const replyBanner = config.replyBanner;
     const replyBannerText = config.replyBannerText;
     const replyClearBtn = config.replyClearBtn;
+    const historyLoader = config.historyLoader;
     const platformSelect = config.platformSelect;
     const contactSelect = config.contactSelect;
     const hiddenService = config.hiddenService;
@@ -29,6 +30,9 @@
     let lastTs = core.toInt(thread.dataset.lastTs);
     let beforeContextReset = null;
 
+    state.loadingOlder = false;
+    state.olderExhausted = false;
+
     const nearBottom = function () {
       return thread.scrollHeight - thread.scrollTop - thread.clientHeight < 120;
     };
@@ -39,6 +43,21 @@
       }
     };
 
+    const setHistoryLoader = function (message, hidden) {
+      if (!historyLoader) {
+        return;
+      }
+      historyLoader.textContent = String(
+        message || "Scroll up to load older messages."
+      );
+      historyLoader.classList.toggle("is-hidden", !!hidden);
+    };
+
+    const getOldestTs = function () {
+      const firstRow = thread.querySelector(".compose-row");
+      return core.toInt(firstRow && firstRow.dataset ? firstRow.dataset.ts : 0);
+    };
+
     const queryParams = function (extraParams) {
       const params = new URLSearchParams();
       params.set("service", thread.dataset.service || "");
@@ -204,8 +223,28 @@
       });
       if (rows.length) {
         scrollToBottom(shouldStick);
+        setHistoryLoader("", false);
       }
       ensureEmptyState();
+      if (!thread.querySelector(".compose-row")) {
+        setHistoryLoader("", true);
+      }
+    };
+
+    const prependMessageHtml = function (html) {
+      const rows = parseMessageRows(html);
+      if (!rows.length) {
+        return 0;
+      }
+      const previousHeight = thread.scrollHeight;
+      const previousTop = thread.scrollTop;
+      rows.forEach(function (msg) {
+        upsertMessageRow(msg);
+      });
+      thread.scrollTop = previousTop + (thread.scrollHeight - previousHeight);
+      setHistoryLoader("", false);
+      ensureEmptyState();
+      return rows.length;
     };
 
     const applyTyping = function (payload) {
@@ -267,6 +306,47 @@
       }
     };
 
+    const loadOlder = async function () {
+      if (state.loadingOlder || state.olderExhausted) {
+        return;
+      }
+      const oldestTs = getOldestTs();
+      if (!oldestTs) {
+        state.olderExhausted = true;
+        setHistoryLoader("Start of conversation.", false);
+        return;
+      }
+      state.loadingOlder = true;
+      setHistoryLoader("Loading older messages...", false);
+      try {
+        const response = await fetch(
+          thread.dataset.pollUrl + "?" + queryParams({ before_ts: String(oldestTs) }),
+          {
+            method: "GET",
+            credentials: "same-origin",
+            headers: { Accept: "application/json" },
+          }
+        );
+        if (!response.ok) {
+          setHistoryLoader("Could not load older messages.", false);
+          return;
+        }
+        const payload = await response.json();
+        const inserted = prependMessageHtml(payload.messages_html || "");
+        state.olderExhausted = !payload.has_older || inserted === 0;
+        setHistoryLoader(
+          state.olderExhausted
+            ? "Start of conversation."
+            : "Scroll up to load older messages.",
+          false
+        );
+      } catch (_err) {
+        setHistoryLoader("Could not load older messages.", false);
+      } finally {
+        state.loadingOlder = false;
+      }
+    };
+
     const setupWebSocket = function () {
       const wsPath = String(thread.dataset.wsUrl || "").trim();
       if (!wsPath || !window.WebSocket) {
@@ -359,8 +439,14 @@
       clearReplyTarget();
       closeSocket();
       lastTs = 0;
+      state.loadingOlder = false;
+      state.olderExhausted = false;
       thread.dataset.lastTs = "0";
       thread.innerHTML = "";
+      if (historyLoader) {
+        thread.appendChild(historyLoader);
+      }
+      setHistoryLoader("Loading recent messages...", false);
       ensureEmptyState("Loading messages...");
       applyTyping({ typing: false });
       poll(true);
@@ -466,6 +552,12 @@
         setReplyTarget(row.dataset.messageId || "", row.dataset.replySnippet || "");
         textarea.focus();
       });
+
+      thread.addEventListener("scroll", function () {
+        if (thread.scrollTop <= 48) {
+          loadOlder();
+        }
+      });
     };
 
     const init = function () {
@@ -473,6 +565,7 @@
       bindContextSelectors();
       applyTyping(core.parseJsonSafe(panel.dataset.initialTyping || "{}", {}));
       ensureEmptyState();
+      setHistoryLoader("", !thread.querySelector(".compose-row"));
       scrollToBottom(true);
       setupWebSocket();
 
@@ -492,6 +585,9 @@
       init: init,
       poll: poll,
       queryParams: queryParams,
+      scrollToLatest: function () {
+        scrollToBottom(true);
+      },
       setBeforeContextReset: function (callback) {
         beforeContextReset = callback;
       },