Add profile sharing

app/src/main/java/io/nekohasekai/sfa/ktx/Shares.kt

@@ -0,0 +1,45 @@
+package io.nekohasekai.sfa.ktx
+
+import android.content.Context
+import android.content.Intent
+import androidx.core.content.FileProvider
+import com.google.android.material.R
+import io.nekohasekai.libbox.ProfileContent
+import io.nekohasekai.sfa.database.Profile
+import io.nekohasekai.sfa.database.TypedProfile
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+import java.io.File
+
+suspend fun Context.shareProfile(profile: Profile) {
+    val content = ProfileContent()
+    content.name = profile.name
+    when (profile.typed.type) {
+        TypedProfile.Type.Local -> {
+            content.type = io.nekohasekai.libbox.Libbox.ProfileTypeLocal
+        }
+
+        TypedProfile.Type.Remote -> {
+            content.type = io.nekohasekai.libbox.Libbox.ProfileTypeRemote
+        }
+    }
+    content.config = File(profile.typed.path).readText()
+    content.remotePath = profile.typed.remoteURL
+    content.autoUpdate = profile.typed.autoUpdate
+    content.lastUpdated = profile.typed.lastUpdated.time
+
+    val configDirectory = File(cacheDir, "share").also { it.mkdirs() }
+    val profileFile = File(configDirectory, "${profile.name}.bpf")
+    profileFile.writeBytes(content.encode())
+    val uri = FileProvider.getUriForFile(this, "$packageName.cache", profileFile)
+    withContext(Dispatchers.Main) {
+        startActivity(
+            Intent.createChooser(
+                Intent(Intent.ACTION_SEND).setType("application/octet-stream")
+                    .setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
+                    .putExtra(Intent.EXTRA_STREAM, uri),
+                getString(R.string.abc_shareactionprovider_share_with)
+            )
+        )
+    }
+}