[pos] Implement new refund API (untested since there is no wallet support)

Also do a bit of code cleanup and minor refactorings

This also removes the volley HTTP library which is not needed anymore

4 files changed, 43 insertions, 7 deletions

diff --git a/merchant-lib/src/main/java/net/taler/merchantlib/MerchantConfig.kt b/merchant-lib/src/main/java/net/taler/merchantlib/Config.kt
index a8d113e..eb09485 100644
--- a/merchant-lib/src/main/java/net/taler/merchantlib/MerchantConfig.kt
+++ b/merchant-lib/src/main/java/net/taler/merchantlib/Config.kt
@@ -20,6 +20,21 @@ import kotlinx.serialization.SerialName
 import kotlinx.serialization.Serializable
 
 @Serializable
+data class ConfigResponse(
+    /**
+     * libtool-style representation of the Merchant protocol version, see
+     * https://www.gnu.org/software/libtool/manual/html_node/Versioning.html#Versioning
+     * The format is "current:revision:age".
+     */
+    val version: String,
+
+    /**
+    Currency supported by this backend.
+     */
+    val currency: String
+)
+
+@Serializable
 data class MerchantConfig(
     @SerialName("base_url")
     val baseUrl: String,
diff --git a/merchant-lib/src/main/java/net/taler/merchantlib/MerchantApi.kt b/merchant-lib/src/main/java/net/taler/merchantlib/MerchantApi.kt
index 96892f5..c92d4d2 100644
--- a/merchant-lib/src/main/java/net/taler/merchantlib/MerchantApi.kt
+++ b/merchant-lib/src/main/java/net/taler/merchantlib/MerchantApi.kt
@@ -72,6 +72,18 @@ class MerchantApi(private val httpClient: HttpClient) {
         } as OrderHistory
     }
 
+    suspend fun giveRefund(
+        merchantConfig: MerchantConfig,
+        orderId: String,
+        request: RefundRequest
+    ): Response<RefundResponse> = response {
+        httpClient.post(merchantConfig.urlFor("private/orders/$orderId/refund")) {
+            header(Authorization, "ApiKey ${merchantConfig.apiKey}")
+            contentType(Json)
+            body = request
+        } as RefundResponse
+    }
+
 }
 
 fun getDefaultHttpClient(): HttpClient = HttpClient(OkHttp) {
diff --git a/merchant-lib/src/main/java/net/taler/merchantlib/PostOrderRequest.kt b/merchant-lib/src/main/java/net/taler/merchantlib/Orders.kt
index 783dd19..783dd19 100644
--- a/merchant-lib/src/main/java/net/taler/merchantlib/PostOrderRequest.kt
+++ b/merchant-lib/src/main/java/net/taler/merchantlib/Orders.kt
diff --git a/merchant-lib/src/main/java/net/taler/merchantlib/ConfigResponse.kt b/merchant-lib/src/main/java/net/taler/merchantlib/Refunds.kt
index 49164e6..61f0ab7 100644
--- a/merchant-lib/src/main/java/net/taler/merchantlib/ConfigResponse.kt
+++ b/merchant-lib/src/main/java/net/taler/merchantlib/Refunds.kt
@@ -16,19 +16,28 @@
 
 package net.taler.merchantlib
 
+import kotlinx.serialization.SerialName
 import kotlinx.serialization.Serializable
+import net.taler.common.Amount
 
 @Serializable
-data class ConfigResponse(
+data class RefundRequest(
     /**
-     * libtool-style representation of the Merchant protocol version, see
-     * https://www.gnu.org/software/libtool/manual/html_node/Versioning.html#Versioning
-     * The format is "current:revision:age".
+     * Amount to be refunded
      */
-    val version: String,
+    val refund: Amount,
 
     /**
-    Currency supported by this backend.
+     * Human-readable refund justification
      */
-    val currency: String
+    val reason: String
+)
+
+@Serializable
+data class RefundResponse(
+    /**
+     * URL (handled by the backend) that the wallet should access to trigger refund processing.
+     */
+    @SerialName("taler_refund_uri")
+    val talerRefundUri: String
 )