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path: root/app/src/main/java/moe/yuuta/workmode/update/UpdateChecker.kt
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package moe.yuuta.workmode.update

import com.elvishew.xlog.XLog
import moe.yuuta.workmode.BuildConfig
import moe.yuuta.workmode.async.Runnable
import org.json.JSONObject
import java.io.BufferedReader
import java.io.InputStreamReader
import java.net.HttpURLConnection
import java.net.URL


class UpdateChecker : Runnable<Update> {
    private val logger = XLog.tag("UpdateChecker").build()
    override fun run(): Update {
        logger.d("Start checking")
        var httpURLConnection: HttpURLConnection? = null
        try {
            val url = URL("https://raw.githubusercontent.com/Trumeet/_priv/master/update/${BuildConfig.APPLICATION_ID}.json")
            httpURLConnection = url.openConnection() as HttpURLConnection
            httpURLConnection.requestMethod = "GET"
            httpURLConnection.connect()

            val inputStream = httpURLConnection.inputStream
            val buffer = StringBuffer()

            if (inputStream == null) {
                throw IllegalStateException("Str is null.")
            }
            val reader = BufferedReader(InputStreamReader(inputStream))

            var line: String?
            while (true) {
                line = reader.readLine()
                if (line == null) break
                buffer.append(line + "\n")
            }

            if (buffer.isEmpty()) {
                throw IllegalStateException("Buffer is empty")
            }

            val response = buffer.toString()

            logger.i("Response: ${httpURLConnection.responseCode} (${httpURLConnection.responseMessage}), data: $response")

            val json = JSONObject(response)
            return Update(json.getInt("version"),
                    json.getString("name"),
                    json.getString("alt_url"),
                    json.getBoolean("alt_url_enable"),
                    json.getBoolean("alt_url_force"))
        } catch (e: Exception) {
            logger.e("Unable to check", e)
            throw e
        } finally {
            // this is done so that there are no open connections left when this task is going to complete
            if (httpURLConnection != null)
                httpURLConnection.disconnect()
        }
    }
}

data class Update(
        val version: Int,
        val name: String,
        val altUrl: String,
        val altUrlEnabled: Boolean,
        val altUrlForce: Boolean
)