Add Taler withdraw URI parsing with test

2 files changed, 66 insertions, 0 deletions

diff --git a/src/commonMain/kotlin/net/taler/wallet/kotlin/TalerUri.kt b/src/commonMain/kotlin/net/taler/wallet/kotlin/TalerUri.kt
new file mode 100644
index 0000000..068b271
--- /dev/null
+++ b/src/commonMain/kotlin/net/taler/wallet/kotlin/TalerUri.kt
@@ -0,0 +1,25 @@
+package net.taler.wallet.kotlin
+
+internal object TalerUri {
+
+    private const val SCHEME = "taler://"
+    private const val AUTHORITY_PAY = "pay"
+    private const val AUTHORITY_WITHDRAW = "withdraw"
+    private const val AUTHORITY_REFUND = "refund"
+    private const val AUTHORITY_TIP = "tip"
+
+    /**
+     * Parses a withdraw URI and returns a bank status URL or null if the URI was invalid.
+     */
+    fun parseWithdrawUri(uri: String): String? {
+        val prefix = "${SCHEME}${AUTHORITY_WITHDRAW}"
+        if (!uri.startsWith(prefix, ignoreCase = true)) return null
+        val parts = uri.substring(prefix.length + 1).split('/')
+        if (parts.size != 3) return null
+        val (host, query, withdrawId) = parts
+        // TODO clarify what query is and if it can include '/' (docs seem out of date)
+        val urlQuery = if (query == "-") "api/withdraw-operation" else query
+        return "https://${host.toLowerCase()}/$urlQuery/$withdrawId"
+    }
+
+}
diff --git a/src/commonTest/kotlin/net/taler/wallet/kotlin/TalerUriTest.kt b/src/commonTest/kotlin/net/taler/wallet/kotlin/TalerUriTest.kt
new file mode 100644
index 0000000..bb4e633
--- /dev/null
+++ b/src/commonTest/kotlin/net/taler/wallet/kotlin/TalerUriTest.kt
@@ -0,0 +1,41 @@
+package net.taler.wallet.kotlin
+
+import net.taler.wallet.kotlin.TalerUri.parseWithdrawUri
+import kotlin.test.Test
+import kotlin.test.assertEquals
+import kotlin.test.assertNull
+
+class TalerUriTest {
+
+    @Test
+    fun testParseWithdrawUri() {
+        // correct parsing
+        var uri = "taler://withdraw/bank.example.com/-/12345"
+        assertEquals("https://bank.example.com/api/withdraw-operation/12345", parseWithdrawUri(uri))
+
+        // correct parsing with custom query
+        uri = "taler://withdraw/bank.example.com/foo/12345"
+        assertEquals("https://bank.example.com/foo/12345", parseWithdrawUri(uri))
+
+        // rejects incorrect scheme
+        uri = "talerx://withdraw/bank.example.com/-/12345"
+        assertNull(parseWithdrawUri(uri))
+
+        // rejects incorrect authority
+        uri = "taler://withdrawx/bank.example.com/-/12345"
+        assertNull(parseWithdrawUri(uri))
+
+        // rejects incorrect authority
+        uri = "taler://withdrawx/bank.example.com/-/12345"
+        assertNull(parseWithdrawUri(uri))
+
+        // rejects too few parts
+        uri = "taler://withdraw/bank.example.com/foo"
+        assertNull(parseWithdrawUri(uri))
+
+        // rejects too many parts
+        uri = "taler://withdraw/bank.example.com/-/12345/foo"
+        assertNull(parseWithdrawUri(uri))
+    }
+
+}