# All files / src/auth sessionStore.ts

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    import { SessionData, SessionOptions } from './sessionData'
    // import { BLOCKSTACK_GAIA_HUB_LABEL } from '../storage/hub'
    import {
      LOCALSTORAGE_SESSION_KEY
    } from './authConstants'
    import { NoSessionDataError } from '../errors'
    // import { Logger } from '../logger'

    /**
     * An abstract class representing the SessionDataStore interface.

     */
    export class SessionDataStore {
      constructor(sessionOptions?: SessionOptions) {
        if (sessionOptions) {
          const newSessionData = new SessionData(sessionOptions)
          this.setSessionData(newSessionData)
        }
      }

      getSessionData(): SessionData {
        throw new Error('Abstract class')
      }

      /* eslint-disable */
      setSessionData(session: SessionData): boolean {
        throw new Error('Abstract class')
      }

      deleteSessionData(): boolean {
        throw new Error('Abstract class')
      }
      /* eslint-enable */
    }

    /**
     * Stores session data in the instance of this class.
     * @ignore
     */
    export class InstanceDataStore extends SessionDataStore {
      sessionData?: SessionData

      constructor(sessionOptions?: SessionOptions) {
        super(sessionOptions)
        if (!this.sessionData) {
          this.setSessionData(new SessionData({}))
        }
      }

      getSessionData(): SessionData {
        if (!this.sessionData) {
          throw new NoSessionDataError('No session data was found.')
        }
        return this.sessionData
      }

      setSessionData(session: SessionData): boolean {
        this.sessionData = session
        return true
      }

      deleteSessionData(): boolean {
        this.setSessionData(new SessionData({}))
        return true
      }
    }

    /**
     * Stores session data in browser a localStorage entry.
     * @ignore
     */
    export class LocalStorageStore extends SessionDataStore {
      key: string

      constructor(sessionOptions?: SessionOptions) {
        super(sessionOptions)
        if (sessionOptions
          && sessionOptions.storeOptions
          && sessionOptions.storeOptions.localStorageKey
          && (typeof sessionOptions.storeOptions.localStorageKey === 'string')) {
          this.key = sessionOptions.storeOptions.localStorageKey
        } else {
          this.key = LOCALSTORAGE_SESSION_KEY
        }

        const data = localStorage.getItem(this.key)
        if (!data) {
          const sessionData = new SessionData({})
          this.setSessionData(sessionData)
        }
      }

      getSessionData(): SessionData {
        const data = localStorage.getItem(this.key)
        if (!data) {
          throw new NoSessionDataError('No session data was found in localStorage')
        }
        const dataJSON = JSON.parse(data)
        return SessionData.fromJSON(dataJSON)
      }

      setSessionData(session: SessionData): boolean {
        localStorage.setItem(this.key, session.toString())
        return true
      }

      deleteSessionData(): boolean {
        localStorage.removeItem(this.key)
        this.setSessionData(new SessionData({}))
        return true
      }

      // checkForLegacyDataAndMigrate(): Promise<SessionData> {
      //   const legacyTransitKey = localStorage.getItem(BLOCKSTACK_APP_PRIVATE_KEY_LABEL)
      //   const legacyGaiaConfig = localStorage.getItem(BLOCKSTACK_GAIA_HUB_LABEL)
      //   const legacyUserData = localStorage.getItem(BLOCKSTACK_STORAGE_LABEL)
      //
      //
      //   if (legacyTransitKey) {
      //     localStorage.removeItem(BLOCKSTACK_APP_PRIVATE_KEY_LABEL)
      //   }
      //
      //
      //
      // }
    }