refactor: item linking

packages/mobile/src/Hooks/useFiles.ts

@@ -68,7 +68,7 @@ export const useFiles = ({ note }: Props) => {
   const filesService = application.getFilesService()
 
   const reloadAttachedFiles = useCallback(() => {
-    setAttachedFiles(application.items.getSortedFilesForItem(note).sort(filesService.sortByName))
+    setAttachedFiles(application.items.getSortedFilesLinkingToItem(note).sort(filesService.sortByName))
   }, [application.items, filesService.sortByName, note])
 
   const reloadAllFiles = useCallback(() => {

packages/mobile/src/Screens/SideMenu/NoteSideMenu.tsx

@@ -139,15 +139,15 @@ export const NoteSideMenu = React.memo((props: Props) => {
       setAttachedFilesLength(0)
       return
     }
-    setAttachedFilesLength(application.items.getSortedFilesForItem(note).length)
+    setAttachedFilesLength(application.items.getSortedFilesLinkingToItem(note).length)
   }, [application, note])
 
   useEffect(() => {
     if (!note) {
       return
     }
     const removeFilesObserver = application.streamItems(ContentType.File, () => {
-      setAttachedFilesLength(application.items.getSortedFilesForItem(note).length)
+      setAttachedFilesLength(application.items.getSortedFilesLinkingToItem(note).length)
     })
     return () => {
       removeFilesObserver()

packages/services/src/Domain/Item/ItemsClientInterface.ts

@@ -114,7 +114,9 @@ export interface ItemsClientInterface {
    * @returns Array containing tags associated with an item
    */
   getSortedTagsForItem(item: DecryptedItemInterface<ItemContent>): SNTag[]
-  getSortedFilesForItem(item: DecryptedItemInterface<ItemContent>): FileItem[]
+
+  getSortedLinkedFilesForItem(item: DecryptedItemInterface<ItemContent>): FileItem[]
+  getSortedFilesLinkingToItem(item: DecryptedItemInterface<ItemContent>): FileItem[]
 
   getSortedLinkedNotesForItem(item: DecryptedItemInterface<ItemContent>): SNNote[]
   getSortedNotesLinkingToItem(item: DecryptedItemInterface<ItemContent>): SNNote[]

packages/snjs/lib/Services/Items/ItemManager.spec.ts

@@ -805,7 +805,7 @@ describe('itemManager', () => {
 
       await itemManager.associateFileWithNote(file, note)
 
-      const filesAssociatedWithNote = itemManager.getSortedFilesForItem(note)
+      const filesAssociatedWithNote = itemManager.getSortedFilesLinkingToItem(note)
 
       expect(filesAssociatedWithNote).toHaveLength(1)
       expect(filesAssociatedWithNote[0].uuid).toBe(file.uuid)
@@ -873,20 +873,38 @@ describe('itemManager', () => {
 
     it('should get all linked files for item', async () => {
       itemManager = createService()
-      const note = createNote('note')
       const file = createFile('A1')
       const file2 = createFile('B2')
+      const file3 = createFile('C3')
 
-      await itemManager.insertItems([note, file, file2])
+      await itemManager.insertItems([file, file2, file3])
 
-      await itemManager.associateFileWithNote(file2, note)
-      await itemManager.associateFileWithNote(file, note)
+      await itemManager.linkFileToFile(file, file3)
+      await itemManager.linkFileToFile(file, file2)
+
+      const sortedFilesForItem = itemManager.getSortedLinkedFilesForItem(file)
+
+      expect(sortedFilesForItem).toHaveLength(2)
+      expect(sortedFilesForItem[0].uuid).toEqual(file2.uuid)
+      expect(sortedFilesForItem[1].uuid).toEqual(file3.uuid)
+    })
+
+    it('should get all files linking to item', async () => {
+      itemManager = createService()
+      const baseFile = createFile('file')
+      const fileToLink1 = createFile('A1')
+      const fileToLink2 = createFile('B2')
+
+      await itemManager.insertItems([baseFile, fileToLink1, fileToLink2])
+
+      await itemManager.linkFileToFile(fileToLink2, baseFile)
+      await itemManager.linkFileToFile(fileToLink1, baseFile)
 
-      const sortedFilesForItem = itemManager.getSortedFilesForItem(note)
+      const sortedFilesForItem = itemManager.getSortedFilesLinkingToItem(baseFile)
 
       expect(sortedFilesForItem).toHaveLength(2)
-      expect(sortedFilesForItem[0].uuid).toEqual(file.uuid)
-      expect(sortedFilesForItem[1].uuid).toEqual(file2.uuid)
+      expect(sortedFilesForItem[0].uuid).toEqual(fileToLink1.uuid)
+      expect(sortedFilesForItem[1].uuid).toEqual(fileToLink2.uuid)
     })
 
     it('should get all linked notes for item', async () => {

packages/snjs/lib/Services/Items/ItemManager.ts

@@ -1192,19 +1192,28 @@ export class ItemManager
     )
   }
 
-  public getSortedFilesForItem(item: DecryptedItemInterface<ItemContent>): Models.FileItem[] {
+  public getSortedLinkedFilesForItem(item: DecryptedItemInterface<ItemContent>): Models.FileItem[] {
     if (this.isTemplateItem(item)) {
       return []
     }
 
-    const filesReferencingItem = this.itemsReferencingItem(item).filter(
+    const filesReferencedByItem = this.referencesForItem(item).filter(
       (ref) => ref.content_type === ContentType.File,
     ) as Models.FileItem[]
-    const filesReferencedByItem = this.referencesForItem(item).filter(
+
+    return naturalSort(filesReferencedByItem, 'title')
+  }
+
+  public getSortedFilesLinkingToItem(item: DecryptedItemInterface<ItemContent>): Models.FileItem[] {
+    if (this.isTemplateItem(item)) {
+      return []
+    }
+
+    const filesReferencingItem = this.itemsReferencingItem(item).filter(
       (ref) => ref.content_type === ContentType.File,
     ) as Models.FileItem[]
 
-    return naturalSort(filesReferencingItem.concat(filesReferencedByItem), 'title')
+    return naturalSort(filesReferencingItem, 'title')
   }
 
   public getSortedLinkedNotesForItem(item: DecryptedItemInterface<ItemContent>): Models.SNNote[] {

packages/web/src/javascripts/Components/ContentListView/NoteListItem.tsx

@@ -32,7 +32,7 @@ const NoteListItem: FunctionComponent<DisplayableListItemProps> = ({
   const editorForNote = application.componentManager.editorForNote(item as SNNote)
   const editorName = editorForNote?.name ?? PLAIN_EDITOR_NAME
   const [icon, tint] = application.iconsController.getIconAndTintForNoteType(editorForNote?.package_info.note_type)
-  const hasFiles = application.items.getSortedFilesForItem(item).length > 0
+  const hasFiles = application.items.getSortedFilesLinkingToItem(item).length > 0
 
   const openNoteContextMenu = (posX: number, posY: number) => {
     notesController.setContextMenuOpen(false)

packages/web/src/javascripts/Components/Icon/Icon.tsx

@@ -5,6 +5,7 @@ import * as icons from '@standardnotes/icons'
 export const ICONS = {
   'account-circle': icons.AccountCircleIcon,
   'arrow-left': icons.ArrowLeftIcon,
+  'arrow-right': icons.ArrowRightIcon,
   'arrows-sort-down': icons.ArrowsSortDownIcon,
   'arrows-sort-up': icons.ArrowsSortUpIcon,
   'attachment-file': icons.AttachmentFileIcon,

packages/web/src/javascripts/Components/LinkedItems/LinkedItemBubble.tsx

@@ -1,24 +1,26 @@
-import { LinkableItem, LinkingController } from '@/Controllers/LinkingController'
+import { ItemLink, LinkableItem, LinkingController } from '@/Controllers/LinkingController'
 import { classNames } from '@/Utils/ConcatenateClassNames'
 import { KeyboardKey } from '@standardnotes/ui-services'
 import { observer } from 'mobx-react-lite'
 import { KeyboardEventHandler, MouseEventHandler, useEffect, useRef, useState } from 'react'
+import { ContentType } from '@standardnotes/snjs'
 import Icon from '../Icon/Icon'
 
 type Props = {
-  item: LinkableItem
+  link: ItemLink
   getItemIcon: LinkingController['getLinkedItemIcon']
   getTitleForLinkedTag: LinkingController['getTitleForLinkedTag']
   activateItem: (item: LinkableItem) => Promise<void>
-  unlinkItem: (item: LinkableItem) => void
+  unlinkItem: LinkingController['unlinkItemFromSelectedItem']
   focusPreviousItem: () => void
   focusNextItem: () => void
   focusedId: string | undefined
   setFocusedId: (id: string) => void
+  isBidirectional: boolean
 }
 
 const LinkedItemBubble = ({
-  item,
+  link,
   getItemIcon,
   getTitleForLinkedTag,
   activateItem,
@@ -27,6 +29,7 @@ const LinkedItemBubble = ({
   focusNextItem,
   focusedId,
   setFocusedId,
+  isBidirectional,
 }: Props) => {
   const ref = useRef<HTMLButtonElement>(null)
 
@@ -36,8 +39,8 @@ const LinkedItemBubble = ({
   const [wasClicked, setWasClicked] = useState(false)
 
   const handleFocus = () => {
-    if (focusedId !== item.uuid) {
-      setFocusedId(item.uuid)
+    if (focusedId !== link.id) {
+      setFocusedId(link.id)
     }
     setShowUnlinkButton(true)
   }
@@ -50,22 +53,22 @@ const LinkedItemBubble = ({
   const onClick: MouseEventHandler = (event) => {
     if (wasClicked && event.target !== unlinkButtonRef.current) {
       setWasClicked(false)
-      void activateItem(item)
+      void activateItem(link.item)
     } else {
       setWasClicked(true)
     }
   }
 
   const onUnlinkClick: MouseEventHandler = (event) => {
     event.stopPropagation()
-    unlinkItem(item)
+    unlinkItem(link)
   }
 
   const onKeyDown: KeyboardEventHandler = (event) => {
     switch (event.key) {
       case KeyboardKey.Backspace: {
         focusPreviousItem()
-        unlinkItem(item)
+        unlinkItem(link)
         break
       }
       case KeyboardKey.Left:
@@ -77,29 +80,34 @@ const LinkedItemBubble = ({
     }
   }
 
-  const [icon, iconClassName] = getItemIcon(item)
-  const tagTitle = getTitleForLinkedTag(item)
+  const [icon, iconClassName] = getItemIcon(link.item)
+  const tagTitle = getTitleForLinkedTag(link.item)
 
   useEffect(() => {
-    if (item.uuid === focusedId) {
+    if (link.id === focusedId) {
       ref.current?.focus()
     }
-  }, [focusedId, item.uuid])
+  }, [focusedId, link.id])
 
   return (
     <button
       ref={ref}
-      className="flex h-6 cursor-pointer items-center rounded border-0 bg-passive-4-opacity-variant py-2 pl-1 pr-2 text-xs text-text hover:bg-contrast focus:bg-contrast"
+      className="group flex h-6 cursor-pointer items-center rounded border-0 bg-passive-4-opacity-variant py-2 pl-1 pr-2 text-xs text-text hover:bg-contrast focus:bg-contrast"
       onFocus={handleFocus}
       onBlur={onBlur}
       onClick={onClick}
-      title={tagTitle ? tagTitle.longTitle : item.title}
+      title={tagTitle ? tagTitle.longTitle : link.item.title}
       onKeyDown={onKeyDown}
     >
       <Icon type={icon} className={classNames('mr-1 flex-shrink-0', iconClassName)} size="small" />
-      <span className="max-w-290px overflow-hidden overflow-ellipsis whitespace-nowrap">
+      <span className="max-w-290px flex items-center overflow-hidden overflow-ellipsis whitespace-nowrap">
         {tagTitle && <span className="text-passive-1">{tagTitle.titlePrefix}</span>}
-        {item.title}
+        <span className="flex items-center gap-1">
+          {link.relationWithSelectedItem === 'indirect' && link.item.content_type !== ContentType.Tag && (
+            <span className={!isBidirectional ? 'hidden group-focus:block' : ''}>Linked By:</span>
+          )}
+          {link.item.title}
+        </span>
       </span>
       {showUnlinkButton && (
         <a

packages/web/src/javascripts/Components/LinkedItems/LinkedItemBubblesContainer.tsx

@@ -1,6 +1,6 @@
 import { observer } from 'mobx-react-lite'
 import ItemLinkAutocompleteInput from './ItemLinkAutocompleteInput'
-import { LinkableItem, LinkingController } from '@/Controllers/LinkingController'
+import { ItemLink, LinkableItem, LinkingController } from '@/Controllers/LinkingController'
 import LinkedItemBubble from './LinkedItemBubble'
 import { useCallback, useState } from 'react'
 import { useResponsiveAppPane } from '../ResponsivePane/ResponsivePaneProvider'
@@ -14,16 +14,23 @@ type Props = {
 const LinkedItemBubblesContainer = ({ linkingController }: Props) => {
   const { toggleAppPane } = useResponsiveAppPane()
   const {
-    allLinkedItems,
-    notesLinkingToItem,
+    allItemLinks,
+    notesLinkingToActiveItem,
+    filesLinkingToActiveItem,
     unlinkItemFromSelectedItem: unlinkItem,
     getTitleForLinkedTag,
     getLinkedItemIcon: getItemIcon,
     activateItem,
   } = linkingController
 
   const [focusedId, setFocusedId] = useState<string>()
-  const focusableIds = allLinkedItems.map((item) => item.uuid).concat([ElementIds.ItemLinkAutocompleteInput])
+  const focusableIds = allItemLinks
+    .map((link) => link.id)
+    .concat(
+      notesLinkingToActiveItem.map((link) => link.id),
+      filesLinkingToActiveItem.map((link) => link.id),
+      [ElementIds.ItemLinkAutocompleteInput],
+    )
 
   const focusPreviousItem = useCallback(() => {
     const currentFocusedIndex = focusableIds.findIndex((id) => id === focusedId)
@@ -53,27 +60,38 @@ const LinkedItemBubblesContainer = ({ linkingController }: Props) => {
     [activateItem, toggleAppPane],
   )
 
+  const isItemBidirectionallyLinked = (link: ItemLink) => {
+    const existsInAllItemLinks = !!allItemLinks.find((item) => link.item.uuid === item.item.uuid)
+    const existsInNotesLinkingToItem = !!notesLinkingToActiveItem.find((item) => link.item.uuid === item.item.uuid)
+
+    return existsInAllItemLinks && existsInNotesLinkingToItem
+  }
+
   return (
     <div
       className={classNames(
         'hidden min-w-80 max-w-full flex-wrap items-center gap-2 bg-transparent md:-mr-2 md:flex',
-        allLinkedItems.length || notesLinkingToItem.length ? 'mt-1' : 'mt-0.5',
+        allItemLinks.length || notesLinkingToActiveItem.length ? 'mt-1' : 'mt-0.5',
       )}
     >
-      {allLinkedItems.concat(notesLinkingToItem).map((item) => (
-        <LinkedItemBubble
-          item={item}
-          key={item.uuid}
-          getItemIcon={getItemIcon}
-          getTitleForLinkedTag={getTitleForLinkedTag}
-          activateItem={activateItemAndTogglePane}
-          unlinkItem={unlinkItem}
-          focusPreviousItem={focusPreviousItem}
-          focusNextItem={focusNextItem}
-          focusedId={focusedId}
-          setFocusedId={setFocusedId}
-        />
-      ))}
+      {allItemLinks
+        .concat(notesLinkingToActiveItem)
+        .concat(filesLinkingToActiveItem)
+        .map((link) => (
+          <LinkedItemBubble
+            link={link}
+            key={link.id}
+            getItemIcon={getItemIcon}
+            getTitleForLinkedTag={getTitleForLinkedTag}
+            activateItem={activateItemAndTogglePane}
+            unlinkItem={unlinkItem}
+            focusPreviousItem={focusPreviousItem}
+            focusNextItem={focusNextItem}
+            focusedId={focusedId}
+            setFocusedId={setFocusedId}
+            isBidirectional={isItemBidirectionallyLinked(link)}
+          />
+        ))}
       <ItemLinkAutocompleteInput
         focusedId={focusedId}
         linkingController={linkingController}