Add GraphQL LeetCode client

Author: madhead

.github/CONTRIBUTING.md

@@ -4,7 +4,7 @@
 
 Before you begin:
 
-- This project is powered by [Kotlin](https://kotlinlang.org), [TelegramBotAPI](https://github.com/InsanusMokrassar/TelegramBotAPI), [Koin](https://insert-koin.io), and [Skija](https://github.com/JetBrains/skija) libraries, [AWS](https://aws.amazon.com) services and [CDK](https://aws.amazon.com/cdk) with [TypeScript](https://www.typescriptlang.org), and [GitHub Actions](https://github.com/features/actions).
+- This project is powered by [Kotlin](https://kotlinlang.org), [TelegramBotAPI](https://github.com/InsanusMokrassar/TelegramBotAPI), [Koin](https://insert-koin.io), [Skija](https://github.com/JetBrains/skija), and [GraphQL](https://graphql.org) technologies, [AWS](https://aws.amazon.com) services and [CDK](https://aws.amazon.com/cdk) with [TypeScript](https://www.typescriptlang.org), and [GitHub Actions](https://github.com/features/actions).
 - Have you read the [code of conduct](CODE_OF_CONDUCT.md)?
 - Check out the [existing issues](https://github.com/JavaBy/jprof_by_bot/issues).
 - Discuss your plans in [the chat](https://t.me/jprof_by) or in an issue.

gradle/libs.versions.toml

@@ -10,6 +10,8 @@ koin = "3.1.2"
 
 ktor = "1.6.8"
 
+graphql-kotlin = "5.5.0"
+
 kotlinx-serialization = "1.3.0"
 jackson = "2.13.0"
 kaml = "0.43.0"
@@ -43,6 +45,8 @@ ktor-bom = { group = "io.ktor", name = "ktor-bom", version.ref = "ktor" }
 ktor-client-apache = { group = "io.ktor", name = "ktor-client-apache" }
 ktor-client-serialization = { group = "io.ktor", name = "ktor-client-serialization" }
 
+graphql-kotlin-ktor-client = { group = "com.expediagroup", name = "graphql-kotlin-ktor-client", version.ref = "graphql-kotlin" }
+
 kotlinx-serialization-core = { module = "org.jetbrains.kotlinx:kotlinx-serialization-core", version.ref = "kotlinx-serialization" }
 kotlinx-serialization-json = { module = "org.jetbrains.kotlinx:kotlinx-serialization-json", version.ref = "kotlinx-serialization" }
 jackson-databind = { group = "com.fasterxml.jackson.core", name = "jackson-databind", version.ref = "jackson" }

leetcode/build.gradle.kts

@@ -1,12 +1,15 @@
 plugins {
     kotlin("jvm")
+    kotlin("plugin.serialization")
 }
 
 dependencies {
     api(project.projects.core)
     api(libs.tgbotapi.core)
     implementation(libs.tgbotapi.extensions.api)
     implementation(libs.log4j.api)
+    implementation(libs.graphql.kotlin.ktor.client)
+    implementation(libs.kotlinx.serialization.core)
 
     testImplementation(libs.junit.jupiter.api)
     testImplementation(libs.junit.jupiter.params)

leetcode/src/main/kotlin/by/jprof/telegram/bot/leetcode/GraphQLLeetCodeClient.kt

@@ -0,0 +1,72 @@
+package by.jprof.telegram.bot.leetcode
+
+import com.expediagroup.graphql.client.ktor.GraphQLKtorClient
+import com.expediagroup.graphql.client.types.GraphQLClientRequest
+import kotlinx.serialization.Required
+import kotlinx.serialization.Serializable
+import org.apache.logging.log4j.LogManager
+import java.io.Closeable
+import java.net.URL
+import kotlin.reflect.KClass
+
+class GraphQLLeetCodeClient : LeetCodeClient, Closeable {
+    companion object {
+        private val logger = LogManager.getLogger(GraphQLLeetCodeClient::class.java)!!
+    }
+
+    private val client = GraphQLKtorClient(
+        url = URL("https://leetcode.com/graphql"),
+    )
+
+    override suspend fun questionData(slug: String): Question? {
+        val request = QuestionDataQuery(QuestionDataQuery.Variables(slug))
+        val response = client.execute(request)
+
+        response.errors?.let { errors ->
+            errors.forEach { error -> logger.error(error.message) }
+            return null
+        }
+
+        return response.data?.question
+    }
+
+    override fun close() {
+        client.close()
+    }
+}
+
+@Serializable
+private class QuestionDataQuery(
+    override val variables: Variables,
+) : GraphQLClientRequest<QuestionData> {
+    @Required
+    override val query: String = """
+        query questionData(${"$"}slug: String!) {
+          question(titleSlug: ${"$"}slug) {
+            title
+            titleSlug
+            content
+            isPaidOnly
+            difficulty
+            likes
+            dislikes
+            categoryTitle
+          }
+        }
+    """.trimIndent()
+
+    @Required
+    override val operationName: String = "questionData"
+
+    override fun responseType(): KClass<QuestionData> = QuestionData::class
+
+    @Serializable
+    data class Variables(
+        val slug: String
+    )
+}
+
+@Serializable
+private data class QuestionData(
+    val question: Question?,
+)

leetcode/src/main/kotlin/by/jprof/telegram/bot/leetcode/LeetCodeClient.kt

@@ -0,0 +1,5 @@
+package by.jprof.telegram.bot.leetcode
+
+interface LeetCodeClient {
+    suspend fun questionData(slug: String): Question?
+}

leetcode/src/main/kotlin/by/jprof/telegram/bot/leetcode/Question.kt

@@ -0,0 +1,15 @@
+package by.jprof.telegram.bot.leetcode
+
+import kotlinx.serialization.Serializable
+
+@Serializable
+data class Question(
+    val title: String,
+    val titleSlug: String,
+    val content: String,
+    val isPaidOnly: Boolean,
+    val difficulty: String,
+    val likes: Int,
+    val dislikes: Int,
+    val categoryTitle: String,
+)