Add content file system

Signed-off-by: Kyle Corry <kylecorry31@gmail.com>

Author: kylecorry31

build.gradle.kts

@@ -1,7 +1,7 @@
 buildscript {
     extra.apply {
         set("groupId", "com.kylecorry.andromeda")
-        set("versionName", "10.5.2")
+        set("versionName", "11.0.0")
         set("targetVersion", 35)
         set("compileVersion", 35)
     }

files/build.gradle

@@ -58,6 +58,7 @@ dependencies {
     implementation project(':core')
     implementation libs.androidx.core.ktx
     implementation libs.kotlinx.coroutines.android
+    implementation libs.androidx.documentfile
     coreLibraryDesugaring libs.desugar
     testImplementation libs.junit
     androidTestImplementation libs.androidx.junit

files/src/main/java/com/kylecorry/andromeda/files/ContentDocument.kt

@@ -0,0 +1,14 @@
+package com.kylecorry.andromeda.files
+
+import android.net.Uri
+import java.time.Instant
+
+data class ContentDocument(
+    val uri: Uri,
+    val displayName: String?,
+    val mimeType: String?,
+    val canRead: Boolean,
+    val canWrite: Boolean,
+    val lastModified: Instant,
+    val size: Long
+)

files/src/main/java/com/kylecorry/andromeda/files/ContentFileSystem.kt

@@ -0,0 +1,66 @@
+package com.kylecorry.andromeda.files
+
+import android.content.Context
+import android.net.Uri
+import androidx.documentfile.provider.DocumentFile
+import java.time.Instant
+import kotlin.collections.toList
+
+class ContentFileSystem(context: Context, treeUri: Uri) {
+
+    private val tree = DocumentFile.fromTreeUri(context, treeUri)
+
+    fun createFile(displayName: String, mimeType: String): ContentDocument? {
+        return tree?.createFile(mimeType, displayName)?.toContentDocument()
+    }
+
+    fun getFile(displayName: String): ContentDocument? {
+        return findFile(displayName)?.toContentDocument()
+    }
+
+    fun deleteFile(displayName: String): Boolean {
+        return findFile(displayName)?.delete() == true
+    }
+
+    fun listFiles(): List<DocumentFile> {
+        return tree?.listFiles()?.toList() ?: emptyList()
+    }
+
+    fun canWrite(displayName: String? = null): Boolean {
+        return if (displayName == null) {
+            tree?.canWrite() == true
+        } else {
+            findFile(displayName)?.canWrite() == true
+        }
+    }
+
+    fun canRead(displayName: String? = null): Boolean {
+        return if (displayName == null) {
+            tree?.canRead() == true
+        } else {
+            findFile(displayName)?.canRead() == true
+        }
+    }
+
+    private fun findFile(displayName: String): DocumentFile? {
+        return tree?.findFile(displayName)
+    }
+
+    companion object {
+        fun getDocumentFromUri(context: Context, uri: Uri): ContentDocument? {
+            return DocumentFile.fromSingleUri(context, uri)?.toContentDocument()
+        }
+
+        private fun DocumentFile.toContentDocument(): ContentDocument {
+            return ContentDocument(
+                uri,
+                name,
+                type,
+                canRead(),
+                canWrite(),
+                Instant.ofEpochMilli(lastModified()),
+                length()
+            )
+        }
+    }
+}

gradle/libs.versions.toml

@@ -1,5 +1,6 @@
 [versions]
 androidLibraryVersion = "8.2.2"
+androidXDocumentFileVersion = "1.0.1"
 appCompatVersion = "1.7.0"
 cameraCamera2Version = "1.3.4"
 constraintlayoutVersion = "2.1.4"
@@ -37,6 +38,7 @@ androidx-camera-lifecycle = { module = "androidx.camera:camera-lifecycle", versi
 androidx-camera-view = { module = "androidx.camera:camera-view", version.ref = "cameraCamera2Version" }
 androidx-constraintlayout = { module = "androidx.constraintlayout:constraintlayout", version.ref = "constraintlayoutVersion" }
 androidx-core-ktx = { module = "androidx.core:core-ktx", version.ref = "coreKtxVersion" }
+androidx-documentfile = { module = "androidx.documentfile:documentfile", version.ref = "androidXDocumentFileVersion" }
 androidx-datastore-preferences = { module = "androidx.datastore:datastore-preferences", version.ref = "datastorePreferencesVersion" }
 androidx-espresso-core = { module = "androidx.test.espresso:espresso-core", version.ref = "espressoCoreVersion" }
 androidx-junit = { module = "androidx.test.ext:junit", version.ref = "junit" }