com.pubnub.internal.endpoints.files.DownloadFileEndpoint.kt Maven / Gradle / Ivy

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package com.pubnub.internal.endpoints.files

import com.pubnub.api.PubNubError
import com.pubnub.api.PubNubException
import com.pubnub.api.crypto.CryptoModule
import com.pubnub.api.enums.PNOperationType
import com.pubnub.api.models.consumer.files.PNDownloadFileResult
import com.pubnub.api.retry.RetryableEndpointGroup
import com.pubnub.internal.EndpointCore
import com.pubnub.internal.PubNubCore
import okhttp3.ResponseBody
import retrofit2.Call
import retrofit2.Response

/**
 * @see [PubNubCore.downloadFile]
 */
class DownloadFileEndpoint(
    private val channel: String,
    private val fileName: String,
    private val fileId: String,
    private val cryptoModule: CryptoModule? = null,
    pubNub: PubNubCore,
) : EndpointCore(pubNub), DownloadFileInterface {
    @Throws(PubNubException::class)
    override fun validateParams() {
        if (channel.isEmpty()) {
            throw PubNubException(PubNubError.CHANNEL_MISSING)
        }
    }

    @Throws(PubNubException::class)
    override fun doWork(queryParams: HashMap): Call =
        retrofitManager.filesService.downloadFile(
            configuration.subscribeKey,
            channel,
            fileId,
            fileName,
            queryParams,
        )

    @Throws(PubNubException::class)
    override fun createResponse(input: Response): PNDownloadFileResult {
        if (!input.isSuccessful) {
            throw PubNubException(PubNubError.HTTP_ERROR)
        }
        if (input.body() == null) {
            throw PubNubException(PubNubError.INTERNAL_ERROR)
        }
        val bodyStream = input.body()!!.byteStream()
        val byteStream =
            cryptoModule?.decryptStream(bodyStream)
                ?: bodyStream

        return PNDownloadFileResult(fileName, byteStream)
    }

    override fun getAffectedChannels() = listOf(channel)

    override fun getAffectedChannelGroups(): List = listOf()

    override fun operationType(): PNOperationType = PNOperationType.FileOperation

    override fun isAuthRequired(): Boolean = true

    override fun isSubKeyRequired(): Boolean = true

    override fun isPubKeyRequired(): Boolean = false

    override fun getEndpointGroupName(): RetryableEndpointGroup = RetryableEndpointGroup.FILE_PERSISTENCE
}