From 0d8ca681f8a293be5cc367358539aa62292a31a8 Mon Sep 17 00:00:00 2001
From: Philip Molares <git@molar.es>
Date: Thu, 4 Jun 2020 22:41:44 +0200
Subject: [PATCH] finished history toolbar buttons (#117)

* added history toolbar functionality
* export now adds a version number
* renamed OldHistoryEntry to V0HistoryEntry

Signed-off-by: Philip Molares <philip.molares@udo.edu>
Signed-off-by: Tilman Vatteroth <tilman.vatteroth@tu-dortmund.de>
Co-authored-by: Tilman Vatteroth <tilman.vatteroth@tu-dortmund.de>
---
 public/locales/en.json                        |  6 ++
 .../history-toolbar/export-history-button.tsx | 18 ++++
 .../history-toolbar/history-toolbar.tsx       | 26 +++---
 .../history-toolbar/import-history-button.tsx | 93 +++++++++++++++++++
 .../landing/pages/history/history.tsx         | 38 +++++++-
 src/utils/historyUtils.ts                     | 49 ++++++----
 6 files changed, 197 insertions(+), 33 deletions(-)
 create mode 100644 src/components/landing/pages/history/history-toolbar/export-history-button.tsx
 create mode 100644 src/components/landing/pages/history/history-toolbar/import-history-button.tsx

diff --git a/public/locales/en.json b/public/locales/en.json
index d784aded8..cf002c259 100644
--- a/public/locales/en.json
+++ b/public/locales/en.json
@@ -33,6 +33,12 @@
                     "title": "Delete history",
                     "question": "Do you want to clear the history?",
                     "disclaimer": "This won't delete any notes."
+                },
+                "importHistoryError": {
+                    "title": "An error occurred",
+                    "textWithFile": "While trying to import history from '{{fileName}}' an error occurred.",
+                    "textWithoutFile": "You did not provide any files to upload the history from.",
+                    "tooNewVersion": "The file '{{fileName}}' comes from a newer client and can't be imported."
                 }
             },
             "tableHeader": {
diff --git a/src/components/landing/pages/history/history-toolbar/export-history-button.tsx b/src/components/landing/pages/history/history-toolbar/export-history-button.tsx
new file mode 100644
index 000000000..1a43af688
--- /dev/null
+++ b/src/components/landing/pages/history/history-toolbar/export-history-button.tsx
@@ -0,0 +1,18 @@
+import React from 'react'
+import { Button } from 'react-bootstrap'
+import { useTranslation } from 'react-i18next'
+import { ForkAwesomeIcon } from '../../../../../fork-awesome/fork-awesome-icon'
+
+export interface ExportHistoryButtonProps {
+  onExportHistory: () => void
+}
+
+export const ExportHistoryButton: React.FC<ExportHistoryButtonProps> = ({ onExportHistory }) => {
+  const { t } = useTranslation()
+
+  return (
+    <Button variant={'light'} title={t('landing.history.toolbar.export')} onClick={onExportHistory}>
+      <ForkAwesomeIcon icon='download'/>
+    </Button>
+  )
+}
diff --git a/src/components/landing/pages/history/history-toolbar/history-toolbar.tsx b/src/components/landing/pages/history/history-toolbar/history-toolbar.tsx
index 4ece09660..f097b988d 100644
--- a/src/components/landing/pages/history/history-toolbar/history-toolbar.tsx
+++ b/src/components/landing/pages/history/history-toolbar/history-toolbar.tsx
@@ -1,11 +1,14 @@
 import React, { ChangeEvent, useEffect, useState } from 'react'
 import { Button, Form, FormControl, InputGroup, ToggleButton, ToggleButtonGroup } from 'react-bootstrap'
-import { Trans, useTranslation } from 'react-i18next'
-import { SortButton, SortModeEnum } from '../../../../sort-button/sort-button'
 import { Typeahead } from 'react-bootstrap-typeahead'
-import './typeahead-hacks.scss'
-import { ClearHistoryButton } from './clear-history-button'
+import { Trans, useTranslation } from 'react-i18next'
 import { ForkAwesomeIcon } from '../../../../../fork-awesome/fork-awesome-icon'
+import { SortButton, SortModeEnum } from '../../../../sort-button/sort-button'
+import { HistoryEntry } from '../history'
+import { ClearHistoryButton } from './clear-history-button'
+import { ExportHistoryButton } from './export-history-button'
+import { ImportHistoryButton } from './import-history-button'
+import './typeahead-hacks.scss'
 
 export type HistoryToolbarChange = (settings: HistoryToolbarState) => void;
 
@@ -26,6 +29,9 @@ export interface HistoryToolbarProps {
   onSettingsChange: HistoryToolbarChange
   tags: string[]
   onClearHistory: () => void
+  onRefreshHistory: () => void
+  onExportHistory: () => void
+  onImportHistory: (entries: HistoryEntry[]) => void
 }
 
 export const initState: HistoryToolbarState = {
@@ -36,7 +42,7 @@ export const initState: HistoryToolbarState = {
   selectedTags: []
 }
 
-export const HistoryToolbar: React.FC<HistoryToolbarProps> = ({ onSettingsChange, tags, onClearHistory }) => {
+export const HistoryToolbar: React.FC<HistoryToolbarProps> = ({ onSettingsChange, tags, onClearHistory, onRefreshHistory, onExportHistory, onImportHistory }) => {
   const [t] = useTranslation()
   const [state, setState] = useState<HistoryToolbarState>(initState)
 
@@ -94,20 +100,16 @@ export const HistoryToolbar: React.FC<HistoryToolbarProps> = ({ onSettingsChange
           variant={'light'}><Trans i18nKey={'landing.history.toolbar.sortByLastVisited'}/></SortButton>
       </InputGroup>
       <InputGroup className={'mr-1 mb-1'}>
-        <Button variant={'light'} title={t('landing.history.toolbar.export')}>
-          <ForkAwesomeIcon icon='download'/>
-        </Button>
+        <ExportHistoryButton onExportHistory={onExportHistory}/>
       </InputGroup>
       <InputGroup className={'mr-1 mb-1'}>
-        <Button variant={'light'} title={t('landing.history.toolbar.import')}>
-          <ForkAwesomeIcon icon='upload'/>
-        </Button>
+        <ImportHistoryButton onImportHistory={onImportHistory}/>
       </InputGroup>
       <InputGroup className={'mr-1 mb-1'}>
         <ClearHistoryButton onClearHistory={onClearHistory}/>
       </InputGroup>
       <InputGroup className={'mr-1 mb-1'}>
-        <Button variant={'light'} title={t('landing.history.toolbar.refresh')}>
+        <Button variant={'light'} title={t('landing.history.toolbar.refresh')} onClick={onRefreshHistory}>
           <ForkAwesomeIcon icon='refresh'/>
         </Button>
       </InputGroup>
diff --git a/src/components/landing/pages/history/history-toolbar/import-history-button.tsx b/src/components/landing/pages/history/history-toolbar/import-history-button.tsx
new file mode 100644
index 000000000..20a8dc570
--- /dev/null
+++ b/src/components/landing/pages/history/history-toolbar/import-history-button.tsx
@@ -0,0 +1,93 @@
+import React, { useRef, useState } from 'react'
+import { Button, Modal } from 'react-bootstrap'
+import { Trans, useTranslation } from 'react-i18next'
+import { ForkAwesomeIcon } from '../../../../../fork-awesome/fork-awesome-icon'
+import { convertV1History, V1HistoryEntry } from '../../../../../utils/historyUtils'
+import { HistoryEntry, HistoryJson } from '../history'
+
+export interface ImportHistoryButtonProps {
+  onImportHistory: (entries: HistoryEntry[]) => void
+}
+
+export const ImportHistoryButton: React.FC<ImportHistoryButtonProps> = ({ onImportHistory }) => {
+  const { t } = useTranslation()
+  const uploadInput = useRef<HTMLInputElement>(null)
+  const [show, setShow] = useState(false)
+  const [fileName, setFilename] = useState('')
+  const [i18nKey, setI18nKey] = useState('')
+
+  const handleShow = (key: string) => {
+    setI18nKey(key)
+    setShow(true)
+  }
+
+  const handleClose = () => {
+    setI18nKey('')
+    setShow(false)
+  }
+
+  const handleUpload = (event: React.ChangeEvent<HTMLInputElement>) => {
+    const { validity, files } = event.target
+    if (files && files[0] && validity.valid) {
+      const file = files[0]
+      setFilename(file.name)
+      if (file.type !== 'application/json' && file.type !== '') {
+        handleShow('landing.history.modal.importHistoryError.textWithFile')
+        return
+      }
+      const fileReader = new FileReader()
+      fileReader.onload = (event) => {
+        if (event.target && event.target.result) {
+          try {
+            const result = event.target.result as string
+            const data = JSON.parse(result) as HistoryJson
+            if (data) {
+              if (data.version) {
+                if (data.version === 2) {
+                  onImportHistory(data.entries)
+                } else {
+                  // probably a newer version we can't support
+                  handleShow('landing.history.modal.importHistoryError.tooNewVersion')
+                }
+              } else {
+                const oldEntries = JSON.parse(result) as V1HistoryEntry[]
+                onImportHistory(convertV1History(oldEntries))
+              }
+            }
+          } catch {
+            handleShow('landing.history.modal.importHistoryError.textWithFile')
+          }
+        }
+      }
+      fileReader.readAsText(file)
+    } else {
+      handleShow('landing.history.modal.importHistoryError.textWithOutFile')
+    }
+  }
+
+  return (
+    <div>
+      <input type='file' className="d-none" accept=".json" onChange={handleUpload}
+        ref={uploadInput}/>
+      <Button variant={'light'}
+        title={t('landing.history.toolbar.import')}
+        onClick={() => uploadInput.current?.click()}
+      >
+        <ForkAwesomeIcon icon='upload'/>
+      </Button>
+      <Modal show={show} onHide={handleClose} animation={true} className="text-dark">
+        <Modal.Header closeButton>
+          <Modal.Title>
+            <ForkAwesomeIcon icon='exclamation-circle'/>&nbsp;<Trans i18nKey={'landing.history.modal.importHistoryError.title'}/>
+          </Modal.Title>
+        </Modal.Header>
+        <Modal.Body className="text-dark text-center">
+          {fileName !== ''
+            ? <h5><Trans i18nKey={i18nKey} values={{ fileName: fileName }}/></h5>
+            : <h5><Trans i18nKey={i18nKey}/></h5>
+          }
+        </Modal.Body>
+      </Modal>
+    </div>
+  )
+}
diff --git a/src/components/landing/pages/history/history.tsx b/src/components/landing/pages/history/history.tsx
index b2ad56948..2fac26bb1 100644
--- a/src/components/landing/pages/history/history.tsx
+++ b/src/components/landing/pages/history/history.tsx
@@ -1,7 +1,12 @@
 import React, { Fragment, useEffect, useState } from 'react'
 import { Row } from 'react-bootstrap'
 import { Trans, useTranslation } from 'react-i18next'
-import { loadHistoryFromLocalStore, setHistoryToLocalStore, sortAndFilterEntries } from '../../../../utils/historyUtils'
+import {
+  downloadHistory,
+  loadHistoryFromLocalStore,
+  setHistoryToLocalStore,
+  sortAndFilterEntries
+} from '../../../../utils/historyUtils'
 import { HistoryContent } from './history-content/history-content'
 import { HistoryToolbar, HistoryToolbarState, initState as toolbarInitState } from './history-toolbar/history-toolbar'
 
@@ -13,6 +18,11 @@ export interface HistoryEntry {
   pinned: boolean
 }
 
+export interface HistoryJson {
+  version: number,
+  entries: HistoryEntry[]
+}
+
 export type pinClick = (entryId: string) => void;
 
 export const History: React.FC = () => {
@@ -21,17 +31,34 @@ export const History: React.FC = () => {
   const [viewState, setViewState] = useState<HistoryToolbarState>(toolbarInitState)
 
   useEffect(() => {
-    const history = loadHistoryFromLocalStore()
-    setHistoryEntries(history)
+    refreshHistory()
   }, [])
 
   useEffect(() => {
-    if (historyEntries === []) {
+    if (!historyEntries || historyEntries === []) {
       return
     }
     setHistoryToLocalStore(historyEntries)
   }, [historyEntries])
 
+  const exportHistory = () => {
+    const dataObject: HistoryJson = {
+      version: 2,
+      entries: historyEntries
+    }
+    downloadHistory(dataObject)
+  }
+
+  const importHistory = (entries: HistoryEntry[]): void => {
+    setHistoryToLocalStore(entries)
+    setHistoryEntries(entries)
+  }
+
+  const refreshHistory = () => {
+    const history = loadHistoryFromLocalStore()
+    setHistoryEntries(history)
+  }
+
   const clearHistory = () => {
     setHistoryToLocalStore([])
     setHistoryEntries([])
@@ -66,6 +93,9 @@ export const History: React.FC = () => {
           onSettingsChange={setViewState}
           tags={tags}
           onClearHistory={clearHistory}
+          onRefreshHistory={refreshHistory}
+          onExportHistory={exportHistory}
+          onImportHistory={importHistory}
         />
       </Row>
       <HistoryContent viewState={viewState.viewState}
diff --git a/src/utils/historyUtils.ts b/src/utils/historyUtils.ts
index eca3b6b6e..1b0d8cce4 100644
--- a/src/utils/historyUtils.ts
+++ b/src/utils/historyUtils.ts
@@ -1,5 +1,5 @@
-import { HistoryEntry } from '../components/landing/pages/history/history'
 import moment from 'moment'
+import { HistoryEntry, HistoryJson } from '../components/landing/pages/history/history'
 import { HistoryToolbarState } from '../components/landing/pages/history/history-toolbar/history-toolbar'
 import { SortModeEnum } from '../components/sort-button/sort-button'
 
@@ -58,30 +58,35 @@ export function formatHistoryDate (date: Date): string {
   return moment(date).format('llll')
 }
 
-export interface OldHistoryEntry {
-    id: string;
-    text: string;
-    time: number;
-    tags: string[];
-    pinned: boolean;
+export interface V1HistoryEntry {
+  id: string;
+  text: string;
+  time: number;
+  tags: string[];
+  pinned: boolean;
+}
+
+export function convertV1History (oldHistory: V1HistoryEntry[]): HistoryEntry[] {
+  return oldHistory.map((entry: V1HistoryEntry) => {
+    return {
+      id: entry.id,
+      title: entry.text,
+      lastVisited: moment(entry.time).toDate(),
+      tags: entry.tags,
+      pinned: entry.pinned
+    }
+  })
 }
 
 export function loadHistoryFromLocalStore (): HistoryEntry[] {
   const historyJsonString = window.localStorage.getItem('history')
+
   if (!historyJsonString) {
     // if localStorage["history"] is empty we check the old localStorage["notehistory"]
     // and convert it to the new format
     const oldHistoryJsonString = window.localStorage.getItem('notehistory')
-    const oldHistory = oldHistoryJsonString ? JSON.parse(JSON.parse(oldHistoryJsonString)) as OldHistoryEntry[] : []
-    return oldHistory.map((entry: OldHistoryEntry) => {
-      return {
-        id: entry.id,
-        title: entry.text,
-        lastVisited: moment(entry.time).toDate(),
-        tags: entry.tags,
-        pinned: entry.pinned
-      }
-    })
+    const oldHistory = oldHistoryJsonString ? JSON.parse(JSON.parse(oldHistoryJsonString)) as V1HistoryEntry[] : []
+    return convertV1History(oldHistory)
   } else {
     return JSON.parse(historyJsonString) as HistoryEntry[]
   }
@@ -90,3 +95,13 @@ export function loadHistoryFromLocalStore (): HistoryEntry[] {
 export function setHistoryToLocalStore (entries: HistoryEntry[]): void {
   window.localStorage.setItem('history', JSON.stringify(entries))
 }
+
+export function downloadHistory (dataObject: HistoryJson): void {
+  const data = 'data:text/json;charset=utf-8;base64,' + Buffer.from(JSON.stringify(dataObject)).toString('base64')
+  const downloadLink = document.createElement('a')
+  downloadLink.setAttribute('href', data)
+  downloadLink.setAttribute('download', `history_${(new Date()).getTime()}.json`)
+  document.body.appendChild(downloadLink)
+  downloadLink.click()
+  downloadLink.remove()
+}