From bbcbb7722aad4c1c04d49ce384c5473371effcc7 Mon Sep 17 00:00:00 2001
From: Anna No <anna.no@xored.com>
Date: Thu, 26 May 2022 16:36:44 +0700
Subject: [PATCH] Board: Checklist item dnd support (#1873)

Signed-off-by: Anna No <anna.no@xored.com>
---
 models/task/src/index.ts                      |  4 +-
 .../components/editor/CardChecklist.svelte    | 68 ++++++++++++++++---
 .../src/components/popups/AddChecklist.svelte | 15 ++--
 .../src/components/todos/CreateTodo.svelte    | 29 ++++++--
 .../src/components/todos/Todos.svelte         |  5 +-
 plugins/task/src/index.ts                     |  2 +-
 6 files changed, 100 insertions(+), 23 deletions(-)

diff --git a/models/task/src/index.ts b/models/task/src/index.ts
index f294d96145..30268d5526 100644
--- a/models/task/src/index.ts
+++ b/models/task/src/index.ts
@@ -125,7 +125,7 @@ export class TTask extends TAttachedDoc implements Task {
   todoItems!: number
 }
 
-@Model(task.class.TodoItem, core.class.AttachedDoc, DOMAIN_TASK)
+@Model(task.class.TodoItem, core.class.AttachedDoc, DOMAIN_TASK, [task.interface.DocWithRank])
 @UX(task.string.Todo)
 export class TTodoItem extends TAttachedDoc implements TodoItem {
   @Prop(TypeMarkup(), task.string.TodoName, task.icon.Task)
@@ -143,6 +143,8 @@ export class TTodoItem extends TAttachedDoc implements TodoItem {
 
   @Prop(Collection(task.class.TodoItem), task.string.Todos)
   items!: number
+
+  declare rank: string
 }
 
 @Model(task.class.SpaceWithStates, core.class.Space)
diff --git a/plugins/board-resources/src/components/editor/CardChecklist.svelte b/plugins/board-resources/src/components/editor/CardChecklist.svelte
index 2b21d96957..c8fe43b72c 100644
--- a/plugins/board-resources/src/components/editor/CardChecklist.svelte
+++ b/plugins/board-resources/src/components/editor/CardChecklist.svelte
@@ -16,7 +16,7 @@
   import { Ref } from '@anticrm/core'
   import { createQuery, getClient, UserBox, MessageBox } from '@anticrm/presentation'
   import type { TodoItem } from '@anticrm/task'
-  import task from '@anticrm/task'
+  import task, { calcRank } from '@anticrm/task'
   import {
     Button,
     CheckBox,
@@ -45,7 +45,9 @@
   let hideDoneItems: boolean = false
   let newItemName = ''
   let editingItemId: Ref<TodoItem> | undefined = undefined
-  let hovered: Ref<TodoItem> | undefined
+  let hovered: Ref<TodoItem> | undefined = undefined
+  let dragItem: TodoItem | undefined = undefined
+  let dragOverItem: TodoItem | undefined = undefined
 
   function deleteChecklist () {
     if (!value) {
@@ -79,11 +81,13 @@
 
   async function addItem (event: CustomEvent<string>) {
     newItemName = ''
+    const prev = checklistItems && checklistItems.length > 0 ? checklistItems[checklistItems.length - 1] : undefined
     const item = {
       name: event.detail ?? '',
       assignee: null,
       dueTo: null,
-      done: false
+      done: false,
+      rank: calcRank(prev, undefined)
     }
     if (item.name.length <= 0) {
       return
@@ -121,16 +125,49 @@
     showPopup(ContextMenu, { object: item }, getEventPopupPositionElement(e))
   }
 
-  $: checklistItemsQuery.query(task.class.TodoItem, { space: value.space, attachedTo: value._id }, (result) => {
-    checklistItems = result
-    done = checklistItems.reduce((result: number, current: TodoItem) => {
-      return current.done ? result + 1 : result
-    }, 0)
-  })
+  function itemDrop (): void {
+    if (dragItem === undefined || dragOverItem === undefined || dragItem._id === dragOverItem._id) {
+      return
+    }
+    const index = checklistItems.findIndex((item) => item._id === dragOverItem?._id)
+    const dragIndex = checklistItems.findIndex((item) => item._id === dragItem?._id)
+    if (dragIndex > index) {
+      const prev = index - 1 >= 0 ? checklistItems[index - 1] : undefined
+      dragItem.rank = calcRank(prev, dragOverItem)
+      client.update(dragItem, { rank: dragItem.rank })
+    } else {
+      const next = index + 1 < checklistItems.length ? checklistItems[index + 1] : undefined
+      dragItem.rank = calcRank(dragOverItem, next)
+      client.update(dragItem, { rank: dragItem.rank })
+    }
+  }
+
+  $: checklistItemsQuery.query(
+    task.class.TodoItem,
+    { space: value.space, attachedTo: value._id },
+    (result) => {
+      checklistItems = result
+      done = checklistItems.reduce((result: number, current: TodoItem) => {
+        return current.done ? result + 1 : result
+      }, 0)
+    },
+    {
+      sort: {
+        rank: 1
+      }
+    }
+  )
 </script>
 
 {#if value !== undefined}
-  <div class="flex-col w-full">
+  <div
+    class="flex-col w-full"
+    on:drop|preventDefault={(ev) => {
+      itemDrop()
+    }}
+    on:dragover|preventDefault
+    on:dragleave
+  >
     <div class="flex-row-stretch mt-4 mb-2">
       {#if isEditingName}
         <div class="flex-grow">
@@ -178,6 +215,17 @@
       <div
         class="flex-row-stretch mb-1 mt-1 pl-1 min-h-7 border-radius-1"
         class:background-button-noborder-bg-hover={hovered === item._id && editingItemId !== item._id}
+        draggable={true}
+        on:dragstart={() => {
+          dragItem = item
+        }}
+        on:dragend={() => {
+          dragItem = undefined
+          dragOverItem = undefined
+        }}
+        on:dragover={() => {
+          dragOverItem = item
+        }}
         on:mouseover={() => {
           hovered = item._id
         }}
diff --git a/plugins/board-resources/src/components/popups/AddChecklist.svelte b/plugins/board-resources/src/components/popups/AddChecklist.svelte
index d5a97791b0..ae9d377dac 100644
--- a/plugins/board-resources/src/components/popups/AddChecklist.svelte
+++ b/plugins/board-resources/src/components/popups/AddChecklist.svelte
@@ -3,7 +3,7 @@
 
   import { Card } from '@anticrm/board'
   import { WithLookup } from '@anticrm/core'
-  import task, { TodoItem } from '@anticrm/task'
+  import task, { calcRank, TodoItem } from '@anticrm/task'
   import { translate } from '@anticrm/platform'
   import presentation, { createQuery, getClient } from '@anticrm/presentation'
   import { Label, Button, Dropdown, EditBox, IconClose } from '@anticrm/ui'
@@ -18,6 +18,7 @@
     label: ''
   }
 
+  let lastCardList: TodoItem | undefined = undefined
   let name: string | undefined
   let selectedTemplate: ListItem | undefined = undefined
   let templateListItems: ListItem[] = [noneListItem]
@@ -51,7 +52,8 @@
         name,
         done: false,
         dueTo: null,
-        assignee: null
+        assignee: null,
+        rank: calcRank(lastCardList)
       }
     )
     if (items.length > 0) {
@@ -61,7 +63,8 @@
             name: item.name,
             dueTo: item.dueTo,
             done: item.done,
-            assignee: item.assignee
+            assignee: item.assignee,
+            rank: item.rank
           })
         )
       )
@@ -75,13 +78,17 @@
     (result: WithLookup<Card>[]) => {
       templateListItems = [noneListItem]
       templatesMap = new Map()
+      lastCardList = undefined
 
       for (const card of result) {
         const todoItems = card.$lookup?.todoItems as TodoItem[]
         if (!todoItems) {
           continue
         }
-
+        if (card._id === value?._id && todoItems.length > 0) {
+          todoItems.sort((a, b) => a.rank?.localeCompare(b.rank))
+          lastCardList = todoItems[todoItems.length - 1]
+        }
         templateListItems.push({
           _id: card._id,
           label: card.title,
diff --git a/plugins/task-resources/src/components/todos/CreateTodo.svelte b/plugins/task-resources/src/components/todos/CreateTodo.svelte
index 2a34f1ef0c..966f52b317 100644
--- a/plugins/task-resources/src/components/todos/CreateTodo.svelte
+++ b/plugins/task-resources/src/components/todos/CreateTodo.svelte
@@ -14,9 +14,9 @@
 -->
 <script lang="ts">
   import type { Class, Ref, Space } from '@anticrm/core'
-  import { Card, getClient } from '@anticrm/presentation'
-  import type { Task } from '@anticrm/task'
-  import task from '@anticrm/task'
+  import { Card, createQuery, getClient } from '@anticrm/presentation'
+  import type { Task, TodoItem } from '@anticrm/task'
+  import task, { calcRank } from '@anticrm/task'
   import { DatePicker, EditBox, Grid } from '@anticrm/ui'
   import { createEventDispatcher } from 'svelte'
   import plugin from '../../plugin'
@@ -28,24 +28,43 @@
   let name: string
   const done = false
   let dueTo: number | null = null
+  let latestItem: TodoItem | undefined = undefined
 
   $: _space = space
 
   const dispatch = createEventDispatcher()
   const client = getClient()
+  const todoItemsQuery = createQuery()
 
   export function canClose (): boolean {
     return objectId === undefined
   }
 
   async function createTodo () {
-    await client.addCollection(task.class.TodoItem, space, objectId, _class, 'todos', {
+    await client.addCollection(task.class.TodoItem, space, objectId, _class, 'todoItems', {
       name,
       assignee: null,
       done,
-      dueTo: dueTo ?? null
+      dueTo: dueTo ?? null,
+      rank: calcRank(latestItem)
     })
   }
+
+  $: todoItemsQuery.query(
+    task.class.TodoItem,
+    { attachedTo: objectId },
+    (result) => {
+      latestItem = undefined
+      if (result && result.length > 0) {
+        latestItem = result[result.length - 1]
+      }
+    },
+    {
+      sort: {
+        rank: 1
+      }
+    }
+  )
 </script>
 
 <Card
diff --git a/plugins/task-resources/src/components/todos/Todos.svelte b/plugins/task-resources/src/components/todos/Todos.svelte
index 3d4380b143..6f8ff5c40c 100644
--- a/plugins/task-resources/src/components/todos/Todos.svelte
+++ b/plugins/task-resources/src/components/todos/Todos.svelte
@@ -53,8 +53,9 @@
         { key: 'done', presenter: plugin.component.TodoStatePresenter, label: plugin.string.TodoState }
       ]}
       options={{
-        // lookup: {
-        // }
+        sort: {
+          rank: 1
+        }
       }}
       query={{ attachedTo: objectId }}
     />
diff --git a/plugins/task/src/index.ts b/plugins/task/src/index.ts
index 6469b1ee34..b938c6650d 100644
--- a/plugins/task/src/index.ts
+++ b/plugins/task/src/index.ts
@@ -89,7 +89,7 @@ export interface Task extends AttachedDoc, DocWithRank {
 /**
  * @public
  */
-export interface TodoItem extends AttachedDoc {
+export interface TodoItem extends AttachedDoc, DocWithRank {
   name: Markup
   assignee: Ref<Employee> | null
   done: boolean