Switch AI integration from OpenAI to Gemini.

.github/workflows/main.yml

@@ -10,7 +10,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     env:
-      OPEN_API_KEY: ${{ secrets.OPEN_API_KEY }}
+      GEMINI_API_KEY: ${{ secrets.GEMINI_API_KEY }}
 
     steps:
       - name: Checkout 
@@ -23,9 +23,18 @@ jobs:
           java-version: 17
           cache: gradle
 
+      - name: Set up Android SDK
+        uses: android-actions/setup-android@v2
+        with:
+          api-level: 33
+          build-tools: "33.0.2"
+
       - name: Grant execute permission for gradlew
         run: chmod +x gradlew
 
+      - name: Create local.properties
+        run: echo "sdk.dir=$ANDROID_SDK_ROOT" > local.properties
+
       - name: Cache Gradle dependencies
         uses: actions/cache@v3
         with:

build.gradle.kts

@@ -7,5 +7,6 @@ plugins {
     alias(libs.plugins.composeCompiler) apply false
     alias(libs.plugins.kotlinMultiplatform) apply false
     alias(libs.plugins.serialization) apply false
+    alias(libs.plugins.googleSecrets) apply false
     alias(libs.plugins.jetbrainsKotlinJvm) apply false
 }

composeApp/build.gradle.kts

@@ -14,6 +14,7 @@ plugins {
     alias(libs.plugins.composeCompiler)
     alias(libs.plugins.serialization)
     alias(libs.plugins.ktlint)
+    alias(libs.plugins.googleSecrets)
 }
 
 ktlint {
@@ -75,6 +76,7 @@ kotlin {
             implementation(libs.androidx.activity.compose)
             implementation(libs.koin.android)
             implementation(libs.koin.androidx.compose)
+            implementation(libs.generativeai)
         }
         commonMain.dependencies {
             implementation(compose.runtime)
@@ -177,14 +179,14 @@ fun ApplicationDefaultConfig.setupBuildConfigFields(
         )
     }
 
-    if (secret("OPEN_API_KEY").isEmpty()) {
-        error("OPEN_API_KEY not set in local.properties")
+    if (secret("GEMINI_API_KEY").isEmpty()) {
+        error("GEMINI_API_KEY not set in local.properties")
     }
 
     buildConfigField(
         type = "String",
-        name = "OPEN_API_KEY",
-        value = "\"${secret("OPEN_API_KEY")}\"",
+        name = "GEMINI_API_KEY",
+        value = "\"${secret("GEMINI_API_KEY")}\"",
     )
 }
 

composeApp/src/androidMain/kotlin/com/developersbreach/kotlindictionarymultiplatform/MainActivity.kt

@@ -5,7 +5,7 @@ import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.tooling.preview.Preview
-import com.developersbreach.kotlindictionarymultiplatform.di.appModule
+import com.developersbreach.kotlindictionarymultiplatform.di.appModules
 import org.koin.android.ext.koin.androidContext
 import org.koin.core.context.startKoin
 
@@ -17,7 +17,7 @@ class MainActivity : ComponentActivity() {
 
         startKoin {
             androidContext(this@MainActivity)
-            modules(appModule)
+            appModules()
         }
 
         setContent {

composeApp/src/androidMain/kotlin/com/developersbreach/kotlindictionarymultiplatform/Platform.android.kt

@@ -11,5 +11,5 @@ actual fun getPlatform(): Platform {
 }
 
 actual fun getOpenApiKey(): String {
-    return BuildConfig.OPEN_API_KEY
+    return BuildConfig.GEMINI_API_KEY
 }

composeApp/src/commonMain/kotlin/com/developersbreach/kotlindictionarymultiplatform/core/network/api/GeminiApiService.kt

@@ -0,0 +1,41 @@
+package com.developersbreach.kotlindictionarymultiplatform.core.network.api
+
+import com.developersbreach.kotlindictionarymultiplatform.Log
+import com.developersbreach.kotlindictionarymultiplatform.core.network.parser.GeminiJsonParser
+import com.developersbreach.kotlindictionarymultiplatform.core.network.request.GeminiPromptBuilder
+import com.developersbreach.kotlindictionarymultiplatform.data.detail.model.KotlinTopicDetails
+import io.ktor.client.HttpClient
+import io.ktor.client.request.post
+import io.ktor.client.request.setBody
+import io.ktor.client.statement.bodyAsText
+import io.ktor.http.ContentType
+import io.ktor.http.contentType
+import kotlinx.serialization.json.Json
+
+class GeminiApiService(
+    private val client: HttpClient,
+    private val json: Json,
+) {
+    suspend fun generateTopicDetails(
+        topicId: String,
+        apiKey: String,
+    ): KotlinTopicDetails {
+        val prompt = GeminiPromptBuilder.buildRequest(topicId)
+        val requestBody = GeminiPromptBuilder.buildRequestBody(prompt)
+
+        val response = client.post(
+            "https://generativelanguage.googleapis.com/v1/models/gemini-2.0-flash:generateContent?key=$apiKey",
+        ) {
+            contentType(ContentType.Application.Json)
+            setBody(requestBody)
+        }
+
+        val responseBody = response.bodyAsText()
+        Log.i("GeminiRawResponse", responseBody)
+
+        val cleanJson = GeminiJsonParser.extractCleanJson(responseBody, json)
+        Log.i("CleanJson", cleanJson)
+
+        return json.decodeFromString(KotlinTopicDetails.serializer(), cleanJson)
+    }
+}

composeApp/src/commonMain/kotlin/com/developersbreach/kotlindictionarymultiplatform/core/network/parser/GeminiJsonParser.kt

@@ -0,0 +1,32 @@
+package com.developersbreach.kotlindictionarymultiplatform.core.network.parser
+
+import kotlinx.serialization.json.Json
+import kotlinx.serialization.json.jsonObject
+import kotlinx.serialization.json.jsonArray
+import kotlinx.serialization.json.jsonPrimitive
+
+object GeminiJsonParser {
+
+    fun extractCleanJson(
+        rawResponse: String,
+        json: Json,
+    ): String {
+        val root = json.parseToJsonElement(rawResponse).jsonObject
+        val text = root["candidates"]
+            ?.jsonArray?.firstOrNull()
+            ?.jsonObject?.get("content")
+            ?.jsonObject?.get("parts")
+            ?.jsonArray?.firstOrNull()
+            ?.jsonObject?.get("text")
+            ?.jsonPrimitive?.content
+            ?: error("Malformed Gemini response")
+
+        return text
+            .removePrefix("```json\n")
+            .removePrefix("```json")
+            .removePrefix("json\n")
+            .removePrefix("json")
+            .removeSuffix("```")
+            .trim()
+    }
+}