Set up multiplatform structure

composeApp/src/commonMain/kotlin/ru/fromchat/utils/Generic.kt

@@ -0,0 +1,8 @@
+package ru.fromchat.utils
+
+import androidx.compose.foundation.layout.WindowInsets
+import androidx.compose.foundation.layout.WindowInsetsSides
+import androidx.compose.foundation.layout.exclude
+import androidx.compose.foundation.layout.only
+
+inline fun WindowInsets.exclude(sides: WindowInsetsSides) = exclude(this.only(sides))

composeApp/src/commonMain/kotlin/ru/fromchat/utils/Ktor.kt

@@ -0,0 +1,87 @@
+@file:Suppress("NOTHING_TO_INLINE")
+package ru.fromchat.utils
+
+import io.ktor.client.HttpClientConfig
+import io.ktor.client.plugins.ClientRequestException
+import io.ktor.client.plugins.DefaultRequest
+import io.ktor.client.plugins.ResponseException
+import io.ktor.client.plugins.ServerResponseException
+import io.ktor.client.plugins.contentnegotiation.ContentNegotiation
+import io.ktor.client.plugins.logging.LogLevel
+import io.ktor.client.plugins.logging.Logger
+import io.ktor.client.plugins.logging.Logging
+import io.ktor.client.plugins.logging.SIMPLE
+import io.ktor.client.statement.HttpResponse
+import io.ktor.client.statement.bodyAsText
+import io.ktor.serialization.Configuration
+import io.ktor.serialization.kotlinx.json.json
+import kotlinx.serialization.json.Json
+import kotlinx.serialization.json.JsonBuilder
+
+/**
+ * Configures the Ktor client for kotlinx.serialization JSON with custom settings.
+ * @param settings Lambda to configure the [JsonBuilder].
+ */
+@PublishedApi
+internal inline fun Configuration.json(crossinline settings: JsonBuilder.() -> Unit) {
+    json(
+        Json {
+            settings()
+        }
+    )
+}
+
+/**
+ * Installs [ContentNegotiation] with JSON support and custom settings in a Ktor client config.
+ * @param settings Lambda to configure the [JsonBuilder].
+ */
+inline fun HttpClientConfig<*>.jsonConfig(
+    crossinline settings: JsonBuilder.() -> Unit
+) = install(ContentNegotiation) {
+    json {
+        settings()
+    }
+}
+
+/**
+ * Installs [DefaultRequest] in a Ktor client config.
+ * @param settings Lambda to configure the [DefaultRequest.DefaultRequestBuilder].
+ */
+inline fun HttpClientConfig<*>.defaultRequest(
+    crossinline settings: DefaultRequest.DefaultRequestBuilder.() -> Unit
+) = install(DefaultRequest) {
+    settings()
+}
+
+/**
+ * Installs [Logging] in a Ktor client config.
+ * @param settings Lambda to configure the [Logging.Config].
+ */
+inline fun HttpClientConfig<*>.logging(
+    crossinline settings: Logging.Config.() -> Unit
+) = install(Logging) {
+    settings()
+}
+
+/**
+ * Installs [Logging] in a Ktor client config with default settings (all logs).
+ */
+inline fun HttpClientConfig<*>.logging() = logging {
+    logger = Logger.SIMPLE
+    level = LogLevel.ALL
+}
+
+/**
+ * Throws if the HTTP response status code is an error (>=400).
+ * @return The [HttpResponse] if successful.
+ * @throws ClientRequestException on 4xx error code.
+ * @throws ServerResponseException on 5xx error code.
+ * @throws ResponseException on unknown error code.
+ */
+suspend fun HttpResponse.failOnError() =
+    when (status.value) {
+        in 100..399 -> this
+        in 400..499 -> throw ClientRequestException(this, bodyAsText())
+        in 500..599 -> throw ServerResponseException(this, bodyAsText())
+        else -> throw ResponseException(this, bodyAsText())
+    }