feat(ui:transaction): deleting transactions is smoother and no longer requires a full list refresh

app/apps/transactions/views/actions.py

@@ -1,3 +1,4 @@
+import json
 from copy import deepcopy
 
 from django.contrib import messages
@@ -63,7 +64,8 @@ def bulk_unpay_transactions(request):
 def bulk_delete_transactions(request):
     selected_transactions = request.GET.getlist("transactions", [])
     transactions = Transaction.objects.filter(id__in=selected_transactions)
-    count = transactions.count()
+    deleted_ids = [str(pk) for pk in transactions.values_list("id", flat=True)]
+    count = len(deleted_ids)
     transactions.delete()
 
     messages.success(
@@ -76,9 +78,20 @@ def bulk_delete_transactions(request):
         % {"count": count},
     )
 
+    # The list isn't reloaded, the client removes the rows it already has and
+    # drops any divider left empty.
+    # See templates/includes/scripts/hyperscript/transactions.html
     return HttpResponse(
         status=204,
-        headers={"HX-Trigger": "updated"},
+        headers={
+            "HX-Trigger": json.dumps(
+                {
+                    "transactions_deleted": {"ids": deleted_ids},
+                    "selective_update": None,
+                    "toasts": None,
+                }
+            )
+        },
     )
 
 

app/apps/transactions/views/transactions.py

@@ -1,4 +1,5 @@
 import datetime
+import json
 from copy import deepcopy
 
 from apps.common.decorators.demo import disabled_on_demo
@@ -478,9 +479,20 @@ def transaction_delete(request, transaction_id, **kwargs):
 
     messages.success(request, _("Transaction deleted successfully"))
 
+    # The list isn't reloaded, the client removes the row it already has and
+    # drops any divider left empty.
+    # See templates/includes/scripts/hyperscript/transactions.html
     return HttpResponse(
         status=204,
-        headers={"HX-Trigger": "updated"},
+        headers={
+            "HX-Trigger": json.dumps(
+                {
+                    "transactions_deleted": {"ids": [str(transaction_id)]},
+                    "selective_update": None,
+                    "toasts": None,
+                }
+            )
+        },
     )
 
 

app/templates/cotton/transaction/item.html

@@ -1,6 +1,7 @@
 {% load markdown %}
 {% load i18n %}
 <div
+    {% if transaction.id and not dummy %}data-transaction-id="{{ transaction.id }}"{% endif %}
     class="transaction {% if transaction.type == "EX" %}expense{% else %}income{% endif %} group/transaction">
   <div class="flex my-1">
     {% if not disable_selection or not dummy %}

app/templates/includes/scripts.html

@@ -6,6 +6,7 @@
 {% include 'includes/scripts/hyperscript/init_tom_select.html' %}
 {% include 'includes/scripts/hyperscript/init_date_picker.html' %}
 {% include 'includes/scripts/hyperscript/htmx_error_handler.html' %}
+{% include 'includes/scripts/hyperscript/transactions.html' %}
 {% include 'includes/scripts/hyperscript/sounds.html' %}
 {% include 'includes/scripts/hyperscript/swal.html' %}
 {% include 'includes/scripts/hyperscript/autosize.html' %}

app/templates/includes/scripts/hyperscript/transactions.html

@@ -0,0 +1,75 @@
+<script type="text/hyperscript">
+  -- Removes deleted transactions from the lists without reloading them.
+  --
+  -- The delete endpoints answer with a `transactions_deleted` HX-Trigger
+  -- carrying the affected ids instead of firing `updated`, which every
+  -- transaction list listens to and would answer with a full re-render.
+  --
+  -- transaction_remover is installed once on the body wrapper so a page with
+  -- hundreds of rows still only holds a single listener. Once the rows are
+  -- gone it announces transactions_removed, and every divider decides for
+  -- itself whether it still has anything to show.
+
+  behavior transaction_remover
+    on transactions_deleted from window
+      set ids to event.detail.ids
+      if no ids then exit end
+
+      set rows to []
+      set lists to []
+      repeat for row in <.transaction[data-transaction-id]/>
+        if ids.includes(the @data-transaction-id of row)
+          append row to rows
+          set list to the closest <#transactions-list/> to row
+          if list and not lists.includes(list) then append list to lists end
+        end
+      end
+      if rows.length is 0 then exit end
+
+      -- freeze the current height so it has somewhere to animate from
+      repeat for row in rows
+        set *height of row to `${row.offsetHeight}px`
+        set *overflow of row to 'hidden'
+      end
+
+      repeat for row in rows
+        get row.offsetHeight -- force a reflow so the height above is the start
+        add .transaction-removing to row
+        set *height of row to '0px'
+      end
+
+      -- `wait for transitionend` can only watch `me`, which here is the wrapper,
+      -- so the rows get a plain wait. Keep it just above the .transaction-removing
+      -- duration in _animations.scss.
+      wait 300ms
+
+      repeat for row in rows
+        remove row
+      end
+
+      trigger transactions_removed on window
+
+      repeat for list in lists
+        send change to list -- the selection action bar recounts what's left
+        set remaining to <.transaction/> in list
+        if remaining.length is 0
+          -- nothing left to show, let the server render the empty state
+          trigger updated on window
+        end
+      end
+  end
+
+  behavior transaction_divider
+    on transactions_removed from window
+      set remaining to <.transaction/> in me
+      if remaining.length is not 0 then exit end
+
+      set *height of me to `${my offsetHeight}px`
+      set *overflow of me to 'hidden'
+      get my offsetHeight
+      add .transaction-removing to me
+      set *height of me to '0px'
+      wait for transitionend or 1s
+      remove me
+  end
+</script>

app/templates/layouts/base.html

@@ -26,6 +26,7 @@
 
 <body class="font-mono">
   <div _="install htmx_error_handler
+            install transaction_remover
             {% block body_hyperscript %}{% endblock %}" hx-headers='{"X-CSRFToken": "{{ csrf_token }}"}'>
     {% include 'includes/mobile_navbar.html' %}
     {% include 'includes/sidebar.html' %}

app/templates/monthly_overview/fragments/list.html

@@ -5,6 +5,7 @@
 <div id="transactions-list">
   {% if late_transactions %}
   <div id="late-transactions" class="transactions-divider"
+       _="install transaction_divider"
        x-data="{ open: sessionStorage.getItem('late-transactions') !== 'false' }"
        x-init="if (sessionStorage.getItem('late-transactions') === null) sessionStorage.setItem('late-transactions', 'true')">
       <div class="mt-3 mb-1 w-full border-b border-b-error/50 transactions-divider-title cursor-pointer">
@@ -30,6 +31,7 @@
 
   {% for x in transactions_by_date %}
     <div id="{{ x.grouper|slugify }}" class="transactions-divider"
+         _="install transaction_divider"
          x-data="{ open: sessionStorage.getItem('{{ x.grouper|slugify }}') !== 'false' }"
          x-init="if (sessionStorage.getItem('{{ x.grouper|slugify }}') === null) sessionStorage.setItem('{{ x.grouper|slugify }}', 'true')">
       <div class="mt-3 mb-1 w-full border-b border-b-base-content/30 transactions-divider-title cursor-pointer">

app/templates/transactions/fragments/list_all.html

@@ -5,6 +5,7 @@
 <div id="transactions-list" class="show-loading">
   {% if late_transactions %}
   <div id="late-transactions" class="transactions-divider"
+       _="install transaction_divider"
        x-data="{ open: sessionStorage.getItem('late-transactions') !== 'false' }"
        x-init="if (sessionStorage.getItem('late-transactions') === null) sessionStorage.setItem('late-transactions', 'true')">
       <div class="mt-3 mb-1 w-full border-b border-b-error/50 transactions-divider-title cursor-pointer">
@@ -30,6 +31,7 @@
 
   {% for x in transactions_by_date %}
     <div id="{{ x.grouper|slugify }}" class="transactions-divider"
+         _="install transaction_divider"
          x-data="{ open: sessionStorage.getItem('{{ x.grouper|slugify }}') !== 'false' }"
          x-init="if (sessionStorage.getItem('{{ x.grouper|slugify }}') === null) sessionStorage.setItem('{{ x.grouper|slugify }}', 'true')">
       <div class="mt-3 mb-1 w-full border-b border-b-base-content/30 transactions-divider-title cursor-pointer">

docker-compose.dev.yml

@@ -2,6 +2,7 @@ volumes:
   wygiwyh_dev_postgres_data: {}
   wygiwyh_temp:
   wygiwyh_attachments:
+  wygiwyh_node_modules:
 
 
 services:
@@ -35,7 +36,7 @@ services:
       - ./frontend/:/usr/src/frontend
       - ./app/:/usr/src/app/
       # http://jdlm.info/articles/2016/03/06/lessons-building-node-app-docker.html
-      - /usr/src/frontend/node_modules
+      - wygiwyh_node_modules:/usr/src/frontend/node_modules
     ports:
       - '${WEBPACK_OUTBOUND_PORT}:5173'
     environment:

frontend/src/styles/_animations.scss

@@ -300,4 +300,21 @@
   100% {
     pointer-events: auto;
   }
-}
+}
+
+// Transaction rows and dividers on their way out.
+// See templates/includes/scripts/hyperscript/transactions.html, which waits on
+// transitionend, so every property here shares one duration and reduced motion
+// shortens it rather than removing it.
+.transaction-removing {
+  transition-property: height, opacity, transform;
+  transition-duration: 0.25s;
+  transition-timing-function: cubic-bezier(0.55, 0.085, 0.68, 0.53);
+  transform: translateX(-1.5rem);
+  opacity: 0;
+  pointer-events: none;
+
+  @media (prefers-reduced-motion: reduce) {
+    transition-duration: 0.01s;
+  }
+}