--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/core/src/commonMain/kotlin/licensee/LicenseeParser.kt	Thu Apr 03 16:11:04 2025 -0400
@@ -0,0 +1,84 @@
+/*
+ * AboutOss is an utility library to retrieve and display
+ * opensource licenses in Android applications.
+ *
+ * Copyright (C) 2023 by Frederic-Charles Barthelery.
+ *
+ * This file is part of AboutOss.
+ *
+ * AboutOss is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * AboutOss is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with AboutOss.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.geekorum.aboutoss.core.licensee
+
+import kotlinx.serialization.Serializable
+import kotlinx.serialization.json.Json
+import okio.Source
+import okio.buffer
+
+class LicenseeParser(
+    input: Source
+): AutoCloseable {
+    private val buffered = input.buffer()
+
+    fun readLicensee(): Map<String, String> {
+        val json = Json {
+            ignoreUnknownKeys = true
+        }
+        val items: List<LicenseItem> = json.decodeFromString(buffered.readUtf8())
+
+        return items.associate {
+            val name = it.name ?: "${it.groupId}:${it.artifactId}"
+            val license = it.spdxLicenses.firstNotNullOfOrNull {
+                "${it.name}\n\n${it.url}"
+            } ?: it.unknownLicenses.firstNotNullOf {
+                "${it.name}\n\n${it.url}"
+            }
+            name to license
+        }
+    }
+
+    override fun close() {
+        buffered.close()
+    }
+}
+
+
+@Serializable
+private data class LicenseItem(
+    val groupId: String,
+    val artifactId: String,
+    val version: String,
+    val spdxLicenses: List<SpdxLicense> = emptyList(),
+    val unknownLicenses: List<UnknownLicense> = emptyList(),
+    val name: String? = null,
+    val scm: Scm? = null,
+)
+
+@Serializable
+private data class SpdxLicense(
+    val identifier: String,
+    val name: String,
+    val url: String,
+)
+
+@Serializable
+private data class UnknownLicense(
+    val name: String,
+    val url: String
+)
+
+@Serializable
+private data class Scm(
+    val url: String,
+)
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