Implement cloud functions support for Desktop

Author: fmasa

buildSrc/src/main/java/Versions.kt

@@ -6,6 +6,7 @@ object Versions {
     val agp = loadPropertyFromResources(versionsFile, "androidGradlePluginVersion")
     val compose = loadPropertyFromResources(versionsFile, "composeVersion")
     val kotlin = loadPropertyFromResources(versionsFile, "kotlinVersion")
+    val ktor = "2.0.0"
 
     val napier = loadPropertyFromResources(versionsFile, "napierVersion")
 

common/build.gradle.kts

@@ -29,7 +29,6 @@ kotlin {
             }
         }
 
-        val ktorVersion = "2.0.0"
         val kodeinVersion = "7.11.0"
 
         val commonMain by getting {
@@ -46,8 +45,6 @@ kotlin {
 
                 api(project(":common:firebase"))
 
-                api("io.ktor:ktor-client-core:$ktorVersion")
-
                 // Basic Kotlin stuff
                 api("org.jetbrains.kotlin:kotlin-stdlib:${Versions.kotlin}")
 
@@ -70,9 +67,10 @@ kotlin {
                 api("io.github.aakira:napier:${Versions.napier}")
 
                 // HTTP client
-                implementation("io.ktor:ktor-client-content-negotiation:$ktorVersion")
-                implementation("io.ktor:ktor-serialization-kotlinx-json:$ktorVersion")
-                api("io.ktor:ktor-client-cio:$ktorVersion")
+                implementation("io.ktor:ktor-client-content-negotiation:${Versions.ktor}")
+                implementation("io.ktor:ktor-serialization-kotlinx-json:${Versions.ktor}")
+                api("io.ktor:ktor-client-cio:${Versions.ktor}")
+                api("io.ktor:ktor-client-core:${Versions.ktor}")
 
                 val richtextVersion = "0.13.0"
                 implementation("com.halilibo.compose-richtext:richtext-commonmark:$richtextVersion")

common/firebase/build.gradle.kts

@@ -23,6 +23,10 @@ kotlin {
             dependencies {
                 api("com.google.cloud:google-cloud-firestore:3.0.18")
                 api("org.jetbrains.kotlinx:kotlinx-coroutines-jdk8:1.6.4")
+                implementation("io.ktor:ktor-client-content-negotiation:${Versions.ktor}")
+                implementation("io.ktor:ktor-serialization-kotlinx-json:${Versions.ktor}")
+                api("io.ktor:ktor-client-cio:${Versions.ktor}")
+                api("io.ktor:ktor-client-core:${Versions.ktor}")
             }
         }
         named("androidMain") {

common/firebase/src/jvmMain/kotlin/cz/frantisekmasa/wfrp_master/common/firebase/functions/CloudFunctions.kt

@@ -1,8 +1,18 @@
 package cz.frantisekmasa.wfrp_master.common.firebase.functions
 
-actual class CloudFunctions(token: String, projectId: String) {
+import io.ktor.client.HttpClient
+
+actual class CloudFunctions(
+    private val token: String,
+    private val projectId: String,
+    private val region: String,
+    private val http: HttpClient,
+) {
     actual fun getHttpsCallable(name: String): HttpsCallableReference {
-        TODO("Implement code that calls HTTP request")
-        // see spec: https://firebase.google.com/docs/functions/callable-reference
+        return HttpsCallableReference(
+            url = "https://$region-$projectId.cloudfunctions.net/$name",
+            token = token,
+            http = http,
+        )
     }
 }

common/firebase/src/jvmMain/kotlin/cz/frantisekmasa/wfrp_master/common/firebase/functions/HttpsCallableReference.kt

@@ -1,7 +1,29 @@
 package cz.frantisekmasa.wfrp_master.common.firebase.functions
 
-actual class HttpsCallableReference {
+import io.ktor.client.HttpClient
+import io.ktor.client.request.bearerAuth
+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
+
+actual class HttpsCallableReference(
+    private val url: String,
+    private val token: String,
+    private val http: HttpClient,
+) {
     actual suspend fun call(data: Any): HttpsCallableResult {
-        TODO("Implement using Ktor")
+        val response = http.post(url) {
+            contentType(ContentType.Application.Json)
+            bearerAuth(token)
+            setBody(mapOf("data" to data))
+        }
+
+        if (response.status.value >= 300) {
+            throw Exception("Cloud function returned ${response.status} (${response.bodyAsText()}")
+        }
+
+        return HttpsCallableResult
     }
 }

common/src/jvmMain/kotlin/cz/frantisekmasa/wfrp_master/common/platformModule.kt

@@ -36,12 +36,20 @@ internal actual val platformModule = DI.Module("jvm") {
     }
 
     val firebaseProjectId = "dnd-master-58fca"
+    val region = "us-central1"
 
     bindSingleton { SettingsStorage() }
     bindSingleton { AuthenticationManager(instance(), instance(), instance()) }
 
     bindSingleton { FirebaseTokenHolder() }
-    bindSingleton { CloudFunctions(instance<FirebaseTokenHolder>().getToken(), firebaseProjectId) }
+    bindSingleton {
+        CloudFunctions(
+            instance<FirebaseTokenHolder>().getToken(),
+            firebaseProjectId,
+            region,
+            instance(),
+        )
+    }
     bindSingleton {
         val tokenHolder: FirebaseTokenHolder = instance()
         val firestore = FirestoreOptions.newBuilder()