started 0.4.0

CHANGELOG.md

@@ -1,4 +1,8 @@
-# 0.3.0
+# SauceNaoAPI Changelog
+
+## 0.4.0
+
+## 0.3.0
 
 * Now `results` field of `SauceNaoAnswer` is optional and is empty list by default
 * Adapted structure almost completed and now can be used with raw results

build.gradle

@@ -1,4 +1,4 @@
-project.version = "0.3.0"
+project.version = "0.4.0"
 project.group = "com.github.insanusmokrassar"
 
 buildscript {

gradle.properties

@@ -1,9 +1,9 @@
 kotlin.code.style=official
-kotlin_version=1.3.31
-kotlin_coroutines_version=1.2.1
-kotlin_serialisation_runtime_version=0.11.0
+kotlin_version=1.3.41
+kotlin_coroutines_version=1.2.2
+kotlin_serialisation_runtime_version=0.11.1
 joda_time_version=2.10.1
-ktor_version=1.1.4
+ktor_version=1.2.3
 
 project_public_name=SauceNao API
 project_public_description=SauceNao API library

src/main/kotlin/com/github/insanusmokrassar/SauceNaoAPI/Constants.kt

@@ -0,0 +1,4 @@
+package com.github.insanusmokrassar.SauceNaoAPI
+
+const val LONG_TIME_LIMIT_MILLIS: Int = 1 * 24 * 60 * 60 * 1000
+const val SHORT_TIME_LIMIT_MILLIS: Int = 30 * 1000

src/main/kotlin/com/github/insanusmokrassar/SauceNaoAPI/Launcher.kt

@@ -1,16 +1,22 @@
 package com.github.insanusmokrassar.SauceNaoAPI
 
-import kotlinx.coroutines.runBlocking
+import kotlinx.coroutines.*
 
 fun main(vararg args: String) {
     val key = args.first()
     val api = SauceNaoAPI(key)
 
-    runBlocking {
-        api.request(
+    val launch = GlobalScope.launch {
+        api.use {
+            it.request(
                 args[1]
             ).also {
                 println(it)
             }
         }
+    }
+
+    runBlocking {
+        launch.join()
+    }
 }

src/main/kotlin/com/github/insanusmokrassar/SauceNaoAPI/SauceNaoAPI.kt

@@ -1,13 +1,19 @@
 package com.github.insanusmokrassar.SauceNaoAPI
 
+import com.github.insanusmokrassar.SauceNaoAPI.exceptions.sauceNaoAPIException
 import com.github.insanusmokrassar.SauceNaoAPI.models.SauceNaoAnswer
 import io.ktor.client.HttpClient
-import io.ktor.client.call.call
 import io.ktor.client.engine.okhttp.OkHttp
-import io.ktor.client.request.parameter
-import io.ktor.client.request.url
+import io.ktor.client.features.ClientRequestException
+import io.ktor.client.request.*
 import io.ktor.client.response.readText
+import kotlinx.coroutines.*
+import kotlinx.coroutines.channels.Channel
+import kotlinx.io.core.Closeable
 import kotlinx.serialization.json.Json
+import org.joda.time.DateTime
+import java.util.logging.Logger
+import kotlin.coroutines.*
 
 private const val API_TOKEN_FIELD = "api_key"
 private const val OUTPUT_TYPE_FIELD = "output_type"
@@ -25,7 +31,40 @@ data class SauceNaoAPI(
     private val outputType: OutputType = JsonOutputType,
     private val client: HttpClient = HttpClient(OkHttp),
     private val searchUrl: String = SEARCH_URL
-) {
+) : Closeable {
+    private val logger = Logger.getLogger("SauceNaoAPI")
+
+    private val requestsChannel = Channel<Pair<Continuation<SauceNaoAnswer>, HttpRequestBuilder>>(Channel.UNLIMITED)
+    private val requestsSendTimes = mutableListOf<DateTime>()
+
+    init {
+        CoroutineScope(Dispatchers.Default).launch {
+            for ((callback, requestBuilder) in requestsChannel) {
+                try {
+                    val answer = makeRequest(requestBuilder)
+                    callback.resumeWith(Result.success(answer))
+
+                    val sleepUntil = if (answer.header.longRemaining == 0) {
+                        getMostOldestInLongPeriod() ?.plusMillis(LONG_TIME_LIMIT_MILLIS)
+                    } else {
+                        if (answer.header.shortRemaining == 0) {
+                            getMostOldestInShortPeriod() ?.plusMillis(SHORT_TIME_LIMIT_MILLIS)
+                        } else {
+                            null
+                        }
+                    }
+
+                    sleepUntil ?.also { _ ->
+                        logger.warning("LONG LIMIT REACHED, SLEEP UNTIL $sleepUntil")
+                        delay(sleepUntil.millis - DateTime.now().millis)
+                    }
+                } catch (e: Exception) {
+                    callback.resumeWith(Result.failure(e))
+                }
+            }
+        }
+    }
+
     suspend fun request(
         url: String,
         resultsCount: Int? = null,
@@ -72,6 +111,57 @@ data class SauceNaoAPI(
         minSimilarity = minSimilarity
     )
 
+    private suspend fun makeRequest(
+        builder: HttpRequestBuilder
+    ): SauceNaoAnswer {
+        return try {
+            val call = client.execute(builder)
+            val answerText = call.response.readText()
+            logger.info(answerText)
+            addRequestTimesAndClear()
+            Json.nonstrict.parse(
+                SauceNaoAnswer.serializer(),
+                answerText
+            )
+        } catch (e: ClientRequestException) {
+            throw e.sauceNaoAPIException
+        }
+    }
+
+    private fun addRequestTimesAndClear() {
+        val newDateTime = DateTime.now()
+
+        clearRequestTimes(newDateTime)
+
+        requestsSendTimes.add(newDateTime)
+    }
+
+    private fun clearRequestTimes(relatedTo: DateTime = DateTime.now()) {
+        val limitValue = relatedTo.minusMillis(LONG_TIME_LIMIT_MILLIS)
+
+        requestsSendTimes.removeAll {
+            it < limitValue
+        }
+    }
+
+    private fun getMostOldestInLongPeriod(): DateTime? {
+        clearRequestTimes()
+
+        return requestsSendTimes.min()
+    }
+
+    private fun getMostOldestInShortPeriod(): DateTime? {
+        val now = DateTime.now()
+
+        val limitTime = now.minusMillis(SHORT_TIME_LIMIT_MILLIS)
+
+        clearRequestTimes(now)
+
+        return requestsSendTimes.asSequence().filter {
+            limitTime < it
+        }.min()
+    }
+
     private suspend fun makeRequest(
         url: String,
         db: Int? = null,
@@ -80,7 +170,9 @@ data class SauceNaoAPI(
         resultsCount: Int? = null,
         minSimilarity: Float? = null
     ): SauceNaoAnswer? {
-        return client.call {
+        return suspendCoroutine<SauceNaoAnswer> {
+            requestsChannel.offer(
+                it to HttpRequestBuilder().apply {
                     url(searchUrl)
                     parameter(URL_FIELD, url)
                     parameter(API_TOKEN_FIELD, apiToken)
@@ -90,11 +182,14 @@ data class SauceNaoAPI(
                     dbmaski ?.also { parameter(DBMASKI_FIELD, it) }
                     resultsCount ?.also { parameter(RESULTS_COUNT_FIELD, it) }
                     minSimilarity ?.also { parameter(MINIMAL_SIMILARITY_FIELD, it) }
-        }.response.readText().let {
-            Json.nonstrict.parse(
-                SauceNaoAnswer.serializer(),
-                it
+                }
             )
         }
     }
+
+    override fun close() {
+        requestsChannel.close()
+        requestsSendTimes.clear()
+        client.close()
+    }
 }

src/main/kotlin/com/github/insanusmokrassar/SauceNaoAPI/additional/header/AccountInfo.kt

@@ -5,14 +5,14 @@ import com.github.insanusmokrassar.SauceNaoAPI.models.Header
 
 val Header.shortLimitStatus: LimitStatus
     get() = LimitStatus(
-        shortRemaining ?: Int.MAX_VALUE,
-        shortLimit ?: Int.MAX_VALUE
+        shortRemaining,
+        shortLimit
     )
 
 val Header.longLimitStatus: LimitStatus
     get() = LimitStatus(
-        longRemaining ?: Int.MAX_VALUE,
-        longLimit ?: Int.MAX_VALUE
+        longRemaining,
+        longLimit
     )
 
 val Header.limits

src/main/kotlin/com/github/insanusmokrassar/SauceNaoAPI/exceptions/TooManyRequestsException.kt

@@ -0,0 +1,13 @@
+package com.github.insanusmokrassar.SauceNaoAPI.exceptions
+
+import io.ktor.client.features.ClientRequestException
+import io.ktor.http.HttpStatusCode.Companion.TooManyRequests
+import kotlinx.io.IOException
+
+val ClientRequestException.sauceNaoAPIException: Exception
+    get() = when (response.status) {
+        TooManyRequests -> TooManyRequestsException()
+        else -> this
+    }
+
+class TooManyRequestsException : IOException()

src/main/kotlin/com/github/insanusmokrassar/SauceNaoAPI/models/Header.kt

@@ -25,13 +25,13 @@ data class Header(
     @SerialName("query_image")
     val queryImage: String? = null, // something like "uuid.jpg"
     @SerialName("short_remaining")
-    val shortRemaining: Int? = null,
+    val shortRemaining: Int = Int.MAX_VALUE,
     @SerialName("long_remaining")
-    val longRemaining: Int? = null,
+    val longRemaining: Int = Int.MAX_VALUE,
     @SerialName("short_limit")
-    val shortLimit: Int? = null,
+    val shortLimit: Int = Int.MAX_VALUE,
     @SerialName("long_limit")
-    val longLimit: Int? = null,
+    val longLimit: Int = Int.MAX_VALUE,
     @SerialName("account_type")
     val accountType: Int? = null,
     @SerialName("user_id")