Migrate framework models to Kotlin and fix build system

.gitignore

@@ -66,3 +66,6 @@ seadroid-key
 /app/unused.txt
 /app/proguardMapping.txt
 build_count.txt
+
+.vscode/
+.claude/

app/build.gradle

@@ -3,11 +3,15 @@ plugins {
     id 'com.google.gms.google-services'
     id 'com.google.firebase.crashlytics'
     id 'org.jetbrains.kotlin.android'
+    id 'org.jetbrains.kotlin.kapt'
 }
 
 android {
     namespace 'com.seafile.seadroid2'
 
+    def releaseKeyPropsFile = project.file("key.properties")
+    def hasReleaseKeystore = releaseKeyPropsFile.exists()
+
     defaultConfig {
 
         applicationId namespace
@@ -57,18 +61,16 @@ android {
 //            keyPassword props.keyAliasPassword
         }
         release {
-//            Signing code for manual signing
-//            storeFile file(System.console().readLine("\n\$ Enter keystore path: "))
-//            storePassword System.console().readPassword("\n\$ Enter keystore password: ").toString()
-//            keyAlias System.console().readLine("\n\$ Enter key alias: ")
-//            keyPassword System.console().readPassword("\n\$ Enter key password: ").toString()
-
-            def props = new Properties()
-            props.load(new FileInputStream(project.file("key.properties")))
-            storeFile project.file(props.keyStore)
-            storePassword props.keyStorePassword
-            keyAlias props.keyAlias
-            keyPassword props.keyAliasPassword
+            if (hasReleaseKeystore) {
+                def props = new Properties()
+                releaseKeyPropsFile.withInputStream { props.load(it) }
+                storeFile project.file(props.getProperty("keyStore"))
+                storePassword props.getProperty("keyStorePassword")
+                keyAlias props.getProperty("keyAlias")
+                keyPassword props.getProperty("keyAliasPassword")
+            } else {
+                logger.warn("Release signing skipped: app/key.properties not found.")
+            }
         }
     }
 
@@ -98,7 +100,7 @@ android {
         }
 
         release {
-            signingConfig signingConfigs.release
+            signingConfig hasReleaseKeystore ? signingConfigs.release : signingConfigs.debug
             minifyEnabled true
 
             resValue "string", "authorities", defaultConfig.applicationId + '.cameraupload.provider'
@@ -237,7 +239,7 @@ android {
         def room_version = "2.6.1"
         implementation "androidx.room:room-runtime:$room_version"
         implementation "androidx.room:room-rxjava2:$room_version"
-        annotationProcessor "androidx.room:room-compiler:$room_version"
+        kapt "androidx.room:room-compiler:$room_version"
 
         //https://github.com/KunMinX/UnPeek-LiveData
         implementation 'com.kunminx.arch:unpeek-livedata:7.8.0'
@@ -329,7 +331,7 @@ android {
         def glide_version = "4.16.0"
         implementation "com.github.bumptech.glide:glide:$glide_version"
         implementation "com.github.bumptech.glide:okhttp3-integration:$glide_version"
-        annotationProcessor "com.github.bumptech.glide:compiler:$glide_version"
+        kapt "com.github.bumptech.glide:compiler:$glide_version"
 
 
         testImplementation 'junit:junit:4.13.2'

app/src/main/java/com/seafile/seadroid2/framework/model/BaseModel.kt

@@ -0,0 +1,42 @@
+package com.seafile.seadroid2.framework.model
+
+import androidx.room.Ignore
+import com.seafile.seadroid2.config.Constants
+import com.seafile.seadroid2.enums.ItemPositionEnum
+import com.seafile.seadroid2.framework.db.entities.FileBackupStatusEntity
+import com.seafile.seadroid2.ui.data_migrate.DataMigrationActivity
+
+/**
+ * Controls data versioning for models that participate in migrations.
+ *
+ * When [v] == 0 legacy data may be incomplete, see [FileBackupStatusEntity] and [DataMigrationActivity].
+ * When [v] == 1 the record has been migrated (app version >= 3.0.0). Default is 1.
+ */
+open class BaseModel {
+    /**
+     * Controls data versioning for models that participate in migrations.
+     *
+     * When [v] == 0 legacy data may be incomplete, see [FileBackupStatusEntity] and [DataMigrationActivity].
+     * When [v] == 1 the record has been migrated (app version >= 3.0.0). Default is 1.
+     */
+    @JvmField
+    var v: Int = 1
+
+    /**
+     * @see com.seafile.seadroid2.config.Constants.DataStatus
+     */
+    @JvmField
+    var data_status: Int = Constants.DataStatus.NORMAL
+
+    @Ignore
+    @JvmField
+    var is_checked: Boolean = false
+
+    @Ignore
+    @JvmField
+    var checkable: Boolean = true
+
+    @Ignore
+    @JvmField
+    var item_position: ItemPositionEnum? = null
+}

app/src/main/java/com/seafile/seadroid2/framework/model/CertificateInfo.kt

@@ -0,0 +1,70 @@
+package com.seafile.seadroid2.framework.model
+
+import android.util.Log
+import java.security.MessageDigest
+import java.security.cert.CertificateParsingException
+import java.security.cert.X509Certificate
+import java.util.Date
+import javax.security.auth.x500.X500Principal
+
+/**
+ * PKIX X.509 v3 certificate wrapper.
+ *
+ * Reference cadroid: https://github.com/bitfireAT/cadroid
+ */
+class CertificateInfo(private val certificate: X509Certificate) {
+
+    fun getSubjectName(): String =
+        certificate.subjectX500Principal.getName(X500Principal.RFC1779)
+
+    fun getSubjectAltNames(): Array<String>? {
+        return try {
+            val altNames = mutableListOf<String>()
+            val subjectAltNames = certificate.subjectAlternativeNames
+            if (subjectAltNames != null) {
+                for (asn1Name in subjectAltNames) {
+                    val type = (asn1Name[0] as? Int) ?: continue
+                    val value = try {
+                        asn1Name[1] as? String ?: "?"
+                    } catch (e: Exception) {
+                        Log.w(DEBUG_TAG, "Couldn't cast alternative subject name to String", e)
+                        "?"
+                    }
+                    altNames.add("$value [$type]")
+                }
+            }
+            altNames.toTypedArray()
+        } catch (e: CertificateParsingException) {
+            Log.w(DEBUG_TAG, "Couldn't parse Subject Alternative Names from certificate", e)
+            null
+        }
+    }
+
+    fun getSerialNumber(): String = certificate.serialNumber.toString(16)
+
+    fun getSignature(algorithm: String): String {
+        return try {
+            val digest = MessageDigest.getInstance(algorithm)
+            digest.update(certificate.encoded)
+            val bytes = digest.digest()
+            buildString(bytes.size * 2) {
+                for (byte in bytes) {
+                    append(Integer.toHexString(byte.toInt() and 0xFF))
+                }
+            }
+        } catch (e: Exception) {
+            Log.e(DEBUG_TAG, "Couldn't calculate certificate digest", e)
+            e.message ?: ""
+        }
+    }
+
+    fun getNotBefore(): Date = certificate.notBefore
+
+    fun getNotAfter(): Date = certificate.notAfter
+
+    fun isCurrentlyValid(): Boolean = runCatching { certificate.checkValidity() }.isSuccess
+
+    private companion object {
+        private const val DEBUG_TAG = "CertificateInfo"
+    }
+}

app/src/main/java/com/seafile/seadroid2/framework/model/ContextModel.kt

@@ -0,0 +1,24 @@
+package com.seafile.seadroid2.framework.model
+
+class ContextModel {
+    @JvmField
+    var repo_id: String? = null
+
+    @JvmField
+    var repo_name: String? = null
+
+    @JvmField
+    var type: String? = null
+
+    /**
+     * parent_dir + name
+     */
+    @JvmField
+    var full_path: String? = null
+
+    @JvmField
+    var permission: String? = null
+
+    @JvmField
+    var encrypted: Boolean = false
+}