enrecipes/app/components/Settings.vue

<template>
<Page @loaded="onPageLoad">
  <ActionBar :androidElevation="viewIsScrolled ? 4 : 0">
    <GridLayout rows="*" columns="auto, *">
      <MDButton class="bx left" variant="text" :text="icon.menu" automationText="Back" @tap="showDrawer" col="0" />
      <Label class="title orkm" :text="'Settings' | L" col="1" />
    </GridLayout>
  </ActionBar>
  <ScrollView @scroll="onScroll">
    <StackLayout class="main-container">
      <Label :text="'Interface' | L" class="group-header orkm" />
      <GridLayout columns="auto, *" class="option">
        <MDRipple colSpan="2" @tap="selectAppLanguage" />
        <Label col="0" verticalAlignment="center" class="bx" :text="icon.globe" />
        <StackLayout col="1">
          <Label :text="'App language' | L" />
          <Label :text="appLanguage" class="info" />
        </StackLayout>
      </GridLayout>
      <GridLayout columns="auto, *" class="option">
        <MDRipple colSpan="2" @tap="selectThemes" />
        <Label col="0" verticalAlignment="center" class="bx" :text="icon.theme" />
        <StackLayout col="1">
          <Label :text="'Theme' | L" />
          <Label :text="`${appTheme}` | L" class="info" />
        </StackLayout>
      </GridLayout>
      <StackLayout class="hr m-10"></StackLayout>
      <Label :text="'Database' | L" class="group-header orkm" />
      <GridLayout columns="auto, *" class="option">
        <MDRipple colSpan="2" @tap="exportCheck" />
        <Label col="0" class="bx" :text="icon.export" />
        <StackLayout col="1">
          <Label :text="'Export a full backup' | L" textWrap="true" />
          <Label v-if="!backupInProgress" :text="'Generates a zip file that contains all your data. This file can be imported back.' | L" class="info" textWrap="true" />
          <GridLayout class="progressContainer" v-else columns="*, 64">
            <MDProgress col="0" :value="backupProgress" maxValue="100"></MDProgress>
            <Label col="1" :text="`  ${backupProgress}%`" />
          </GridLayout>
        </StackLayout>
      </GridLayout>
      <GridLayout columns="auto, *" class="option">
        <MDRipple colSpan="2" @tap="importCheck" />
        <Label col="0" class="bx" :text="icon.import" />
        <StackLayout col="1">
          <Label :text="'Import from backup' | L" textWrap="true" />
          <Label :text="'Supports full backups exported by this app' | L" class="info" textWrap="true" />
        </StackLayout>
      </GridLayout>
    </StackLayout>
  </ScrollView>
</Page>
</template>

<script>
import {
  ApplicationSettings,
  path,
  knownFolders,
  File,
  Folder,
  Observable,
  Device
}
from "@nativescript/core"
import * as Permissions from "@nativescript-community/perms"
import {
  Zip
}
from "@nativescript/zip"
import * as Toast from "nativescript-toast"
import * as Filepicker from "nativescript-plugin-filepicker"
import Theme from "@nativescript/theme"
import {
  localize,
  overrideLocale
}
from "@nativescript/localize"
import {
  mapState,
  mapActions
}
from "vuex"

import ActionDialog from "./modal/ActionDialog.vue"
import ConfirmDialog from "./modal/ConfirmDialog.vue"

import * as utils from "~/shared/utils"

export default {
  data() {
    return {
      viewIsScrolled: false,
      appTheme: "Light",
      appLanguage: "English",
      backupProgress: 0,
      backupInProgress: false,
    }
  },
  computed: {
    ...mapState( [
      "icon",
      "recipes",
      "userCategories",
      "userYieldUnits",
      "mealPlans",
      "currentComponent",
      "language",
    ] ),
  },
  methods: {
    ...mapActions( [
      "setCurrentComponentAction",
      "importCategoriesAction",
      "importYieldUnitsAction",
      "importRecipesAction",
      "importMealPlansAction",
    ] ),
    onPageLoad( args ) {
      const page = args.object;
      page.bindingContext = new Observable();
      this.setCurrentComponentAction( "Settings" )
    },
    // HELPERS
    showDrawer() {
      utils.showDrawer()
    },
    onScroll( args ) {
      this.viewIsScrolled = args.scrollY ? true : false
    },

    // LANGUAGE SELECTION
    selectAppLanguage() {
      let languages = this.language.map( e => e.title )
      this.$showModal( ActionDialog, {
        props: {
          title: "App language",
          list: [ ...languages ],
        },
      } ).then( ( action ) => {
        if ( action && action !== "Cancel" && this.appLanguage !== action ) {
          let currentLocale = Device.language.split( '-' )[ 0 ]
          let locale = this.language.filter( e => e.title === action )[ 0 ].locale
          if ( currentLocale !== locale ) {
            this.$showModal( ConfirmDialog, {
              props: {
                title: "Restart required",
                description: localize( "EnRecipes needs to be restarted for the app language to take effect." ),
                cancelButtonText: "CANCEL",
                okButtonText: "RESTART",
              },
            } ).then( ( result ) => {
              if ( result ) {
                this.appLanguage = action
                ApplicationSettings.setString( "appLanguage", action )

                overrideLocale( locale )
                setTimeout( ( e ) => utils.restartApp(), 250 )
              }
            } )
          }
        }
      } )
    },
    // THEME SELECTION
    selectThemes() {
      this.$showModal( ActionDialog, {
        props: {
          title: "Theme",
          list: [ "Light", "Dark" ],
          height: "96",
        },
      } ).then( ( action ) => {
        if ( action && action !== "Cancel" && this.appTheme !== action ) {
          this.$showModal( ConfirmDialog, {
            props: {
              title: "Restart required",
              description: localize( "EnRecipes needs to be restarted for the theme change to take effect." ),
              cancelButtonText: "CANCEL",
              okButtonText: "RESTART",
            },
          } ).then( ( result ) => {
            if ( result ) {
              this.appTheme = action
              ApplicationSettings.setString( "appTheme", action )
              setTimeout( ( e ) => utils.restartApp(), 250 )
            }
          } )
        }
      } )
    },

    // EXPORT HANDLERS
    exportCheck() {
      if ( !this.recipes.length ) {
        Toast.makeText(
          localize( "Add at least one recipe to perform a backup" ),
          "long"
        ).show()
      }
      else {
        this.permissionCheck(
          this.permissionConfirmation,
          localize( "EnRecipes requires storage permission in order to backup your data to this device." ),
          this.exportBackup
        )
      }
    },
    exportBackup() {
      this.exportFiles( "create" )
      let date = new Date()
      let formattedDate =
        date.getFullYear() +
        "-" +
        ( "0" + ( date.getMonth() + 1 ) ).slice( -2 ) +
        "-" +
        ( "0" + date.getDate() ).slice( -2 ) +
        "_" +
        ( "0" + date.getHours() ).slice( -2 ) +
        ( "0" + date.getMinutes() ).slice( -2 ) +
        ( "0" + date.getSeconds() ).slice( -2 )
      const sdDownloadPath = Folder.fromPath(
        android.os.Environment.getExternalStorageDirectory().getAbsolutePath()
      ).getFolder( "Download" ).path
      let fromPath = path.join( knownFolders.documents().path, "EnRecipes" )
      let destPath = path.join(
        sdDownloadPath,
        `EnRecipes-Backup_${formattedDate}.zip`
      )
      this.backupInProgress = true
      Zip.zip( {
        directory: fromPath,
        archive: destPath,
        onProgress: ( progress ) => {
          this.backupProgress = progress
        },
      } ).then( ( success ) => {
        Toast.makeText(
          "Backup file successfully saved to Download folder",
          "long"
        ).show()
        this.exportFiles( "delete" )
      } )
    },
    exportFiles( option ) {
      const folder = path.join( knownFolders.documents().path, "EnRecipes" )
      const EnRecipesFile = File.fromPath( path.join( folder, "recipes.json" ) )
      let userCategoriesFile, userYieldUnitsFile, mealPlansFile
      if ( this.userCategories.length ) {
        userCategoriesFile = File.fromPath(
          path.join( folder, "userCategories.json" )
        )
      }
      if ( this.userYieldUnits.length ) {
        userYieldUnitsFile = File.fromPath(
          path.join( folder, "userYieldUnits.json" )
        )
      }
      if ( this.mealPlans.length ) {
        mealPlansFile = File.fromPath( path.join( folder, "mealPlans.json" ) )
      }
      switch ( option ) {
        case "create":
          this.writeDataToFile( EnRecipesFile, this.recipes )
          this.userCategories.length &&
            this.writeDataToFile( userCategoriesFile, this.userCategories )
          this.userYieldUnits.length &&
            this.writeDataToFile( userYieldUnitsFile, this.userYieldUnits )
          this.mealPlans.length &&
            this.writeDataToFile( mealPlansFile, this.mealPlans )
          break
        case "delete":
          EnRecipesFile.remove()
          this.userCategories.length && userCategoriesFile.remove()
          this.userYieldUnits.length && userYieldUnitsFile.remove()
          this.mealPlans.length && mealPlansFile.remove()
          break
        default:
          break
      }
    },
    writeDataToFile( file, data ) {
      file.writeText( JSON.stringify( data ) )
    },

    // IMPORT HANDLERS
    importCheck() {
      this.permissionCheck(
        this.permissionConfirmation,
        localize( "EnRecipes requires storage permission in order to import your data from a previous backup." ),
        this.openFilePicker
      )
    },
    openFilePicker() {
      Filepicker.create( {
          mode: "single",
          extensions: [ "zip" ],
        } )
        .present()
        .then( ( selection ) => {
          Toast.makeText( localize( "Verifying..." ) ).show()
          let zipPath = selection[ 0 ]
          this.validateZipContent( zipPath )
        } )
    },
    importDataToDB( data, db, zipPath ) {
      switch ( db ) {
        case "EnRecipesDB":
          this.importImages( zipPath )
          this.importRecipesAction( data )
          break
        case "userCategoriesDB":
          this.importCategoriesAction( data )
          break
        case "userYieldUnitsDB":
          this.importYieldUnitsAction( data )
          break
        case "mealPlansDB":
          this.importMealPlansAction( data )
          break
        default:
          break
      }
    },
    isFileDataValid( file ) {
      file.forEach( ( file, i ) => {
        if ( File.exists( file.path ) ) {
          File.fromPath( file.path )
            .readText()
            .then( ( data ) => {
              Array.isArray( JSON.parse( data ) ) &&
                this.importDataToDB( JSON.parse( data ), file.db, file.zipPath )
            } )
        }
      } )
    },
    validateZipContent( zipPath ) {
      Zip.unzip( {
        archive: zipPath,
        overwrite: true,
      } ).then( ( extractedFolderPath ) => {
        let cacheFolderPath = extractedFolderPath + "/EnRecipes"
        const EnRecipesFilePath = cacheFolderPath + "/recipes.json"
        const userCategoriesFilePath = cacheFolderPath + "/userCategories.json"
        const userYieldUnitsFilePath = cacheFolderPath + "/userYieldUnits.json"
        const mealPlansFilePath = cacheFolderPath + "/mealPlans.json"
        if ( Folder.exists( cacheFolderPath ) ) {
          this.isFileDataValid( [ {
              zipPath,
              path: EnRecipesFilePath,
              db: "EnRecipesDB",
            },
            {
              zipPath,
              path: userCategoriesFilePath,
              db: "userCategoriesDB"
            },
            {
              zipPath,
              path: userYieldUnitsFilePath,
              db: "userYieldUnitsDB"
            },
            {
              zipPath,
              path: mealPlansFilePath,
              db: "mealPlansDB"
            },
          ] )
        }
        else {
          Folder.fromPath( extractedFolderPath ).remove()
          Toast.makeText(
            "Import failed. Backup file is incorrect or corrupt",
            "long"
          ).show()
        }
        if ( Folder.exists( cacheFolderPath + "/Images" ) ) {
          this.importImages( cacheFolderPath + "/Images" )
        }
      } )
    },
    importImages( sourcePath ) {
      let dest = knownFolders.documents().path
      Zip.unzip( {
        archive: sourcePath,
        directory: dest,
        overwrite: true,
      } ).then( ( res ) => {
        Toast.makeText( localize( "Import successful" ), "long" ).show()
        this.$navigateBack()
      } )
    },

    // PERMISSIONS HANDLER
    permissionCheck( confirmation, description, action ) {
      if ( !ApplicationSettings.getBoolean( "storagePermissionAsked", false ) ) {
        confirmation( description ).then( ( e ) => {
          if ( e ) {
            Permissions.request( "photo" ).then( ( res ) => {
              let status = res[ Object.keys( res )[ 0 ] ]
              if ( status === "authorized" ) action()
              if ( status !== "denied" )
                ApplicationSettings.setBoolean( "storagePermissionAsked", true )
              else Toast.makeText( localize( "Permission denied" ) ).show()
            } )
          }
        } )
      }
      else {
        Permissions.check( "photo" ).then( ( res ) => {
          let status = res[ Object.keys( res )[ 0 ] ]
          if ( status !== "authorized" ) {
            confirmation( description ).then( ( e ) => {
              e && utils.openAppSettingsPage()
            } )
          }
          else action()
        } )
      }
    },
    permissionConfirmation( description ) {
      return this.$showModal( ConfirmDialog, {
        props: {
          title: "Grant permission",
          description,
          cancelButtonText: "NOT NOW",
          okButtonText: "CONTINUE",
        },
      } )
    },
  },
  mounted() {
    this.appTheme = ApplicationSettings.getString( "appTheme", "Light" )
    this.appLanguage = ApplicationSettings.getString( "appLanguage", localize( "System default" ) )
  },
}
</script>