Render chat by chat ID

- Upon logout, the chat-list-item component is reprocessed and the subscription
returns a nil chat because the app-db state has been cleaned up. We fix the
timestamp formatter to handle nil values and return a default string.

src/status_im/contexts/chat/home/chat_list_item/view.cljs

@@ -280,18 +280,31 @@
    {:style (merge style/container {:margin-horizontal 0})}
    [chat-item item]])
 
+(defn- bottom-sheet-options
+  [chat-id chat-type]
+  (cond-> {:content (fn []
+                      (let [chat (rf/sub [:chats/chat-by-id chat-id])]
+                        [actions/chat-actions chat false]))}
+    (= chat-type constants/one-to-one-chat-type)
+    (assoc :selected-item
+           (fn []
+             (let [chat (rf/sub [:chats/chat-by-id chat-id])]
+               [chat-user chat])))))
+
 (defn chat-list-item
-  [{:keys [chat-id chat-type]
-    :as   item}]
-  (let [customization-color (rf/sub [:profile/customization-color])
-        theme               (quo.theme/use-theme)]
+  [{:keys [chat-id]}]
+  (let [{:keys [chat-type]
+         :as   chat}        (rf/sub [:chats/chat-by-id chat-id])
+        customization-color (rf/sub [:profile/customization-color])
+        theme               (quo.theme/use-theme)
+        on-long-press       (rn/use-callback
+                             (fn []
+                               (rf/dispatch [:show-bottom-sheet
+                                             (bottom-sheet-options chat-id chat-type)]))
+                             [chat-id chat-type])]
     [rn/touchable-highlight
      {:style          style/container
       :on-press       (open-chat chat-id)
       :underlay-color (colors/resolve-color customization-color theme 5)
-      :on-long-press  #(rf/dispatch [:show-bottom-sheet
-                                     (cond-> {:content (fn [] [actions/chat-actions item false])}
-                                       (= chat-type constants/one-to-one-chat-type)
-                                       (assoc :selected-item
-                                              (fn [] [chat-user item])))])}
-     [chat-item item]]))
+      :on-long-press  on-long-press}
+     [chat-item chat]]))

src/status_im/contexts/chat/home/view.cljs

@@ -23,12 +23,10 @@
   [_ index]
   #js {:length 56 :offset (* 56 index) :index index})
 
-(defn filter-and-sort-items-by-tab
+(defn filter-by-tab
   [tab items]
   (let [k (if (= tab :tab/groups) :group-chat :chat-id)]
-    (->> items
-         (filter k)
-         (sort-by :timestamp >))))
+    (filter k items)))
 
 (defn empty-state-content
   [theme]
@@ -56,7 +54,7 @@
 (defn chats
   [{:keys [theme selected-tab set-scroll-ref scroll-shared-value]}]
   (let [unfiltered-items (rf/sub [:chats/chats-stack-items])
-        items            (filter-and-sort-items-by-tab selected-tab unfiltered-items)
+        items            (filter-by-tab selected-tab unfiltered-items)
         on-scroll        (rn/use-callback
                           (fn [event]
                             (common.banner/set-scroll-shared-value

src/status_im/subs/chats.cljs

@@ -53,22 +53,18 @@
  (fn [[{:keys [chats]}] [_ community-id chat-id]]
    (get chats (string/replace chat-id community-id ""))))
 
-(re-frame/reg-sub
- :chats/home-list-chats
+(re-frame/reg-sub :chats/home-list-chats
  :<- [:chats/chats]
  :<- [:chats-home-list]
- :<- [:multiaccount/public-key]
- (fn [[chats active-chats my-public-key]]
-   (reduce #(if-let [item (get chats %2)]
-              (let [group-chat-member? (and (chat.events/group-chat? item)
-                                            (group-chats.db/member? my-public-key item))]
-                (conj %1
-                      (assoc item
-                             :group-chat-member?
-                             group-chat-member?)))
-              %1)
-           []
-           active-chats)))
+ (fn [[chats active-chats-ids]]
+   (->> active-chats-ids
+        (keep #(get chats %))
+        (sort-by :timestamp >)
+        (map (fn [{:keys [chat-id id public-key group-chat]}]
+               {:chat-id    chat-id
+                :group-chat group-chat
+                :id         id
+                :public-key public-key})))))
 
 (re-frame/reg-sub
  :chats/chat-by-id

src/utils/datetime.cljs

@@ -160,15 +160,16 @@
 ;;;; Timestamp formatters
 (defn- to-str
   [ms old-fmt-fn yesterday-fmt-fn today-fmt-fn]
-  (let [date      (t.coerce/from-long ms)
-        ;; NOTE(edge-case): this is wrong, it uses the current timezone offset, regardless of DST.
+  (if-let [date (t.coerce/from-long ms)]
+    (let [;; NOTE(edge-case): this is wrong, it uses the current timezone offset, regardless of DST.
           local     (t/plus date time-zone-offset)
           today     (t/minus (t/today-at-midnight) time-zone-offset)
           yesterday (t/plus today (t/days -1))]
       (cond
         (t/before? date yesterday) (old-fmt-fn local)
         (t/before? date today)     (yesterday-fmt-fn local)
-      :else                      (today-fmt-fn local))))
+        :else                      (today-fmt-fn local)))
+    ""))
 
 (defn to-short-str
   [ms]