js: Convert static/js/message_fetch.js to ES6 module.

Signed-off-by: Anders Kaseorg <anders@zulip.com>

.eslintrc.json

@@ -152,7 +152,6 @@
                 "localStorage": false,
                 "location": false,
                 "message_events": false,
-                "message_fetch": false,
                 "message_list": false,
                 "narrow": false,
                 "padded_widget": false,

frontend_tests/node_tests/narrow_activate.js

@@ -20,7 +20,8 @@ set_global("current_msg_list", {});
 const hashchange = {__esModule: true};
 rewiremock("../../static/js/hashchange").with(hashchange);
 set_global("home_msg_list", {});
-const message_fetch = set_global("message_fetch", {});
+const message_fetch = {__esModule: true};
+rewiremock("../../static/js/message_fetch").with(message_fetch);
 const message_list = set_global("message_list", {
     set_narrowed(value) {
         this.narrowed = value;

frontend_tests/node_tests/ui_init.js

@@ -76,7 +76,7 @@ rewiremock("../../static/js/gear_menu").with({initialize() {}});
 rewiremock("../../static/js/hashchange").with({initialize() {}});
 set_global("hotspots", {initialize() {}});
 // Accesses home_msg_list, which is a lot of complexity to set up
-set_global("message_fetch", {initialize() {}});
+rewiremock("../../static/js/message_fetch").with({initialize() {}});
 rewiremock("../../static/js/message_scroll").with({initialize() {}});
 const message_viewport = {
     __esModule: true,

static/js/bundles/app.js

@@ -31,7 +31,6 @@ import "../composebox_typeahead";
 import "../hotkey";
 import "../notifications";
 import "../message_events";
-import "../message_fetch";
 import "../server_events";
 import "../zulip";
 import "../presence";

static/js/global.d.ts

@@ -25,7 +25,6 @@ declare let hotspots: any;
 declare let i18n: any;
 declare let input_pill: any;
 declare let message_events: any;
-declare let message_fetch: any;
 declare let message_list: any;
 declare let narrow: any;
 declare let padded_widget: any;

static/js/message_fetch.js

@@ -1,15 +1,13 @@
-"use strict";
+import * as channel from "./channel";
-
+import {Filter} from "./filter";
-const channel = require("./channel");
+import * as huddle_data from "./huddle_data";
-const {Filter} = require("./filter");
+import * as message_scroll from "./message_scroll";
-const huddle_data = require("./huddle_data");
+import * as message_store from "./message_store";
-const message_scroll = require("./message_scroll");
+import * as message_util from "./message_util";
-const message_store = require("./message_store");
+import * as people from "./people";
-const message_util = require("./message_util");
+import * as pm_list from "./pm_list";
-const people = require("./people");
+import * as stream_data from "./stream_data";
-const pm_list = require("./pm_list");
+import * as ui_report from "./ui_report";
-const stream_data = require("./stream_data");
-const ui_report = require("./ui_report");
 
 const consts = {
     backfill_idle_time: 10 * 1000,
@@ -128,7 +126,7 @@ function get_messages_success(data, opts) {
         // The server occasionally returns no data during a
         // restart.  Ignore those responses and try again
         setTimeout(() => {
-            exports.load_messages(opts);
+            load_messages(opts);
         }, 0);
         return;
     }
@@ -178,7 +176,7 @@ function handle_operators_supporting_id_based_api(data) {
     return data;
 }
 
-exports.load_messages = function (opts) {
+export function load_messages(opts) {
     if (typeof opts.anchor === "number") {
         // Messages that have been locally echoed messages have
         // floating point temporary IDs, which is intended to be a.
@@ -269,25 +267,25 @@ exports.load_messages = function (opts) {
             // We might want to be more clever here
             $("#connection-error").addClass("show");
             setTimeout(() => {
-                exports.load_messages(opts);
+                load_messages(opts);
             }, consts.error_retry_time);
         },
     });
-};
+}
 
-exports.load_messages_for_narrow = function (opts) {
+export function load_messages_for_narrow(opts) {
     const msg_list = message_list.narrowed;
 
-    exports.load_messages({
+    load_messages({
         anchor: opts.anchor,
         num_before: consts.narrow_before,
         num_after: consts.narrow_after,
         msg_list,
         cont: opts.cont,
     });
-};
+}
 
-exports.get_backfill_anchor = function (msg_list) {
+export function get_backfill_anchor(msg_list) {
     if (msg_list === home_msg_list) {
         msg_list = message_list.all;
     }
@@ -300,9 +298,9 @@ exports.get_backfill_anchor = function (msg_list) {
     // msg_list is empty, which is an impossible
     // case, raise a fatal error.
     throw new Error("There are no message available to backfill.");
-};
+}
 
-exports.get_frontfill_anchor = function (msg_list) {
+export function get_frontfill_anchor(msg_list) {
     if (msg_list === home_msg_list) {
         msg_list = message_list.all;
     }
@@ -319,9 +317,9 @@ exports.get_frontfill_anchor = function (msg_list) {
     // fetch more data, and if user is, then the available data is wrong
     // and we raise a fatal error.
     throw new Error("There are no message available to frontfill.");
-};
+}
 
-exports.maybe_load_older_messages = function (opts) {
+export function maybe_load_older_messages(opts) {
     // This function gets called when you scroll to the top
     // of your window, and you want to get messages older
     // than what the browsers originally fetched.
@@ -332,17 +330,17 @@ exports.maybe_load_older_messages = function (opts) {
         return;
     }
 
-    exports.do_backfill({
+    do_backfill({
         msg_list,
         num_before: consts.backward_batch_size,
     });
-};
+}
 
-exports.do_backfill = function (opts) {
+export function do_backfill(opts) {
     const msg_list = opts.msg_list;
-    const anchor = exports.get_backfill_anchor(msg_list);
+    const anchor = get_backfill_anchor(msg_list);
 
-    exports.load_messages({
+    load_messages({
         anchor,
         num_before: opts.num_before,
         num_after: 0,
@@ -353,9 +351,9 @@ exports.do_backfill = function (opts) {
             }
         },
     });
-};
+}
 
-exports.maybe_load_newer_messages = function (opts) {
+export function maybe_load_newer_messages(opts) {
     // This function gets called when you scroll to the bottom
     // of your window, and you want to get messages newer
     // than what the browsers originally fetched.
@@ -367,37 +365,37 @@ exports.maybe_load_newer_messages = function (opts) {
         return;
     }
 
-    const anchor = exports.get_frontfill_anchor(msg_list);
+    const anchor = get_frontfill_anchor(msg_list);
 
     function load_more(data, args) {
         if (args.fetch_again && args.msg_list === current_msg_list) {
-            exports.maybe_load_newer_messages({msg_list: current_msg_list});
+            maybe_load_newer_messages({msg_list: current_msg_list});
         }
     }
 
-    exports.load_messages({
+    load_messages({
         anchor,
         num_before: 0,
         num_after: consts.forward_batch_size,
         msg_list,
         cont: load_more,
     });
-};
+}
 
-exports.start_backfilling_messages = function () {
+export function start_backfilling_messages() {
     // backfill more messages after the user is idle
     $(document).idle({
         idle: consts.backfill_idle_time,
         onIdle() {
-            exports.do_backfill({
+            do_backfill({
                 num_before: consts.backfill_batch_size,
                 msg_list: home_msg_list,
             });
         },
     });
-};
+}
 
-exports.initialize = function () {
+export function initialize() {
     // get the initial message list
     function load_more(data) {
         // If we haven't selected a message in the home view yet, and
@@ -415,7 +413,7 @@ exports.initialize = function () {
 
         if (data.found_newest) {
             server_events.home_view_loaded();
-            exports.start_backfilling_messages();
+            start_backfilling_messages();
             return;
         }
 
@@ -424,7 +422,7 @@ exports.initialize = function () {
         const messages = data.messages;
         const latest_id = messages[messages.length - 1].id;
 
-        exports.load_messages({
+        load_messages({
             anchor: latest_id,
             num_before: 0,
             num_after: consts.catch_up_batch_size,
@@ -443,7 +441,7 @@ exports.initialize = function () {
         // the user's unmuted history as our anchor.
         anchor = "first_unread";
     }
-    exports.load_messages({
+    load_messages({
         anchor,
         num_before: consts.num_before_home_anchor,
         num_after: consts.num_after_home_anchor,
@@ -476,12 +474,10 @@ exports.initialize = function () {
         filter: new Filter([{operator: "in", operand: "home"}]),
         excludes_muted_topics: true,
     });
-    exports.load_messages({
+    load_messages({
         anchor: "newest",
         num_before: consts.recent_topics_initial_fetch_size,
         num_after: 0,
         msg_list: recent_topics_message_list,
     });
-};
+}
-
-window.message_fetch = exports;

static/js/message_scroll.js

@@ -3,6 +3,7 @@ import _ from "lodash";
 import * as floating_recipient_bar from "./floating_recipient_bar";
 import * as hash_util from "./hash_util";
 import * as loading from "./loading";
+import * as message_fetch from "./message_fetch";
 import * as message_viewport from "./message_viewport";
 import * as narrow_state from "./narrow_state";
 

static/js/narrow.js

@@ -8,6 +8,7 @@ const condense = require("./condense");
 const {Filter} = require("./filter");
 const hashchange = require("./hashchange");
 const message_edit = require("./message_edit");
+const message_fetch = require("./message_fetch");
 const {MessageListData} = require("./message_list_data");
 const message_scroll = require("./message_scroll");
 const message_store = require("./message_store");

static/js/ui_init.js

@@ -24,6 +24,7 @@ const lightbox = require("./lightbox");
 const markdown = require("./markdown");
 const markdown_config = require("./markdown_config");
 const message_edit = require("./message_edit");
+const message_fetch = require("./message_fetch");
 const message_scroll = require("./message_scroll");
 const message_viewport = require("./message_viewport");
 const muting = require("./muting");