Persist log view preferences

app/src/main/java/se/ajpanton/notificationlog/ViewLogsFragment.kt

@@ -8,6 +8,9 @@ import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import se.ajpanton.notificationlog.data.EncryptedNotificationLogStore
 import se.ajpanton.notificationlog.databinding.FragmentViewLogsBinding
 import se.ajpanton.notificationlog.model.NotificationLogEntry
+import se.ajpanton.notificationlog.settings.LogField
+import se.ajpanton.notificationlog.settings.LogViewSettingsStore
+import se.ajpanton.notificationlog.settings.TimestampZone
 import java.text.DateFormat
 import java.util.Date
 
@@ -44,16 +47,24 @@ class ViewLogsFragment : Fragment(R.layout.fragment_view_logs) {
     private fun render(view: FragmentViewLogsBinding, entries: List<NotificationLogEntry>) {
         view.logRows.removeAllViews()
         view.emptyView.visibility = if (entries.isEmpty()) View.VISIBLE else View.GONE
+        val settings = LogViewSettingsStore(requireContext()).load()
         entries.forEach { entry ->
             view.logRows.addView(TextView(requireContext()).apply {
-                text = listOfNotNull(
-                    DateFormat.getDateTimeInstance().format(Date(entry.recordedAtEpochMillis)),
-                    entry.appName,
-                    entry.action.name.lowercase().replace('_', ' '),
-                    entry.contents,
-                ).joinToString(" · ")
+                text = settings.order.filter { it in settings.visibleFields }.mapNotNull { field -> when (field) {
+                    LogField.TIMESTAMP -> timestamp(entry.recordedAtEpochMillis, settings.timestampZone)
+                    LogField.APP_NAME -> entry.appName
+                    LogField.PACKAGE_NAME -> entry.packageName
+                    LogField.ACTION -> entry.action.name.lowercase().replace('_', ' ')
+                    LogField.CONTENTS -> entry.contents
+                } }.joinToString(" · ")
                 setPadding(0, 12, 0, 12)
             })
         }
     }
+
+    private fun timestamp(value: Long, zone: TimestampZone): String {
+        val format = DateFormat.getDateTimeInstance()
+        if (zone == TimestampZone.UTC) format.timeZone = java.util.TimeZone.getTimeZone("UTC")
+        return format.format(Date(value))
+    }
 }

app/src/main/java/se/ajpanton/notificationlog/settings/LogViewSettings.kt

@@ -0,0 +1,10 @@
+package se.ajpanton.notificationlog.settings
+
+enum class LogField { TIMESTAMP, APP_NAME, PACKAGE_NAME, ACTION, CONTENTS }
+enum class TimestampZone { LOCAL_NOW, UTC, EVENT_LOCAL }
+
+data class LogViewSettings(
+    val visibleFields: Set<LogField> = setOf(LogField.TIMESTAMP, LogField.APP_NAME, LogField.ACTION, LogField.CONTENTS),
+    val order: List<LogField> = LogField.entries,
+    val timestampZone: TimestampZone = TimestampZone.LOCAL_NOW,
+)

app/src/main/java/se/ajpanton/notificationlog/settings/LogViewSettingsStore.kt

@@ -0,0 +1,19 @@
+package se.ajpanton.notificationlog.settings
+
+import android.content.Context
+import androidx.core.content.edit
+
+class LogViewSettingsStore(context: Context) {
+    private val prefs = context.getSharedPreferences("log-view-settings", Context.MODE_PRIVATE)
+    fun load() = LogViewSettings(
+        visibleFields = prefs.getStringSet("visible", LogViewSettings().visibleFields.map { it.name }.toSet())!!
+            .map(LogField::valueOf).toSet(),
+        order = prefs.getString("order", null)?.split(',')?.map(LogField::valueOf) ?: LogField.entries,
+        timestampZone = TimestampZone.valueOf(prefs.getString("zone", TimestampZone.LOCAL_NOW.name)!!),
+    )
+    fun save(settings: LogViewSettings) = prefs.edit {
+        putStringSet("visible", settings.visibleFields.map { it.name }.toSet())
+        putString("order", settings.order.joinToString(",") { it.name })
+        putString("zone", settings.timestampZone.name)
+    }
+}