feat: support direct_sign_in param for sign-in uri (#235)

Author: xiaoyijun

android-sdk/android/src/main/kotlin/io/logto/sdk/android/auth/logto/LogtoAuthSession.kt

@@ -45,6 +45,7 @@ class LogtoAuthSession(
                 loginHint = signInOptions.loginHint,
                 firstScreen = signInOptions.firstScreen,
                 identifiers = signInOptions.identifiers,
+                directSignIn = signInOptions.directSignIn,
                 extraParams = signInOptions.extraParams,
                 includeReservedScopes = logtoConfig.includeReservedScopes,
             ),

android-sdk/android/src/main/kotlin/io/logto/sdk/android/type/SignInOptions.kt

@@ -1,10 +1,13 @@
 package io.logto.sdk.android.type
 
+import io.logto.sdk.core.type.DirectSignInOptions
+
 class SignInOptions(
     val redirectUri: String,
     val prompt: String? = null,
     val firstScreen: String? = null,
     val identifiers: List<String>? = null,
+    val directSignIn: DirectSignInOptions? = null,
     val loginHint: String? = null,
     val extraParams: Map<String, String>? = null,
 )

kotlin-sdk/kotlin/src/main/kotlin/io/logto/sdk/core/Core.kt

@@ -64,6 +64,10 @@ object Core {
                 addQueryParameter(QueryKey.FIRST_SCREEN, it)
             }
 
+            options.directSignIn?.let {
+                addQueryParameter(QueryKey.DIRECT_SIGN_IN, "${it.method}:${it.target}")
+            }
+
             options.identifiers?.let {
                 addQueryParameter(QueryKey.IDENTIFIER, it.joinToString(" "))
             }

kotlin-sdk/kotlin/src/main/kotlin/io/logto/sdk/core/constant/DirectSignInMethod.kt

@@ -0,0 +1,6 @@
+package io.logto.sdk.core.constant
+
+object DirectSignInMethod {
+    const val SOCIAL = "social"
+    const val SSO = "sso"
+}

kotlin-sdk/kotlin/src/main/kotlin/io/logto/sdk/core/type/DirectSignInOptions.kt

@@ -0,0 +1,6 @@
+package io.logto.sdk.core.type
+
+class DirectSignInOptions(
+    val method: String,
+    val target: String,
+)

kotlin-sdk/kotlin/src/main/kotlin/io/logto/sdk/core/type/GenerateSignInUriOptions.kt

@@ -12,6 +12,7 @@ class GenerateSignInUriOptions(
     val loginHint: String? = null,
     val firstScreen: String? = null,
     val identifiers: List<String>? = null,
+    val directSignIn: DirectSignInOptions? = null,
     val extraParams: Map<String, String>? = null,
     val includeReservedScopes: Boolean? = true,
 )

kotlin-sdk/kotlin/src/test/kotlin/io/logto/sdk/core/CoreTest.kt

@@ -3,6 +3,7 @@ package io.logto.sdk.core
 import com.google.common.truth.Truth.assertThat
 import io.logto.sdk.core.constant.*
 import io.logto.sdk.core.exception.UriConstructionException
+import io.logto.sdk.core.type.DirectSignInOptions
 import io.logto.sdk.core.type.GenerateSignInUriOptions
 import okhttp3.HttpUrl.Companion.toHttpUrl
 import org.junit.Assert
@@ -317,6 +318,29 @@ class CoreTest {
         }
     }
 
+    @Test
+    fun `generateSignInUri should contain direct_sign_in if provided`() {
+        val directSignIn = DirectSignInOptions(
+            method = DirectSignInMethod.SOCIAL,
+            target = "google"
+        )
+
+        val signInUri = Core.generateSignInUri(
+            GenerateSignInUriOptions(
+                authorizationEndpoint = testAuthorizationEndpoint,
+                clientId = testClientId,
+                redirectUri = testRedirectUri,
+                codeChallenge = testCodeChallenge,
+                state = testState,
+                directSignIn = directSignIn,
+            )
+        )
+
+        signInUri.toHttpUrl().apply {
+            assertThat(queryParameterValues(QueryKey.DIRECT_SIGN_IN)).contains("${directSignIn.method}:${directSignIn.target}")
+        }
+    }
+
     @Test
     fun `generateSignInUri should contain extra params if provided`() {
         val extraParamKey = "tenant_id"