add signature setting

For multiple users it helps to
keep track about who did what.

app/src/main/java/it/danieleverducci/lunatracker/MainActivity.kt

@@ -57,6 +57,7 @@ class MainActivity : AppCompatActivity() {
     lateinit var buttonsContainer: ViewGroup
     lateinit var recyclerView: RecyclerView
     lateinit var handler: Handler
+    var signature = ""
     var savingEvent = false
     val updateListRunnable: Runnable = Runnable {
         if (logbook != null && !pauseLogbookUpdate)
@@ -168,6 +169,8 @@ class MainActivity : AppCompatActivity() {
             logbookRepo = FileLogbookRepository()
         }
 
+        signature = settingsRepository.loadSignature()
+
         val noBreastfeeding = settingsRepository.loadNoBreastfeeding()
         findViewById<View>(R.id.layout_nipples).visibility = when (noBreastfeeding) {
             true -> View.GONE
@@ -386,6 +389,13 @@ class MainActivity : AppCompatActivity() {
             pauseLogbookUpdate = false
         })
 
+        // show optional signature
+        if (event.signature.isNotEmpty()) {
+            val signatureTextEdit = dialogView.findViewById<TextView>(R.id.dialog_event_detail_type_signature)
+            signatureTextEdit.text =  String.format(getString(R.string.dialog_event_detail_signature), event.signature)
+            signatureTextEdit.visibility = View.VISIBLE
+        }
+
         // create next/previous links to events of the same type
 
         val previousTextView = dialogView.findViewById<TextView>(R.id.dialog_event_previous)
@@ -635,6 +645,8 @@ class MainActivity : AppCompatActivity() {
     fun logEvent(event: LunaEvent) {
         savingEvent(true)
 
+        event.signature = signature
+
         setLoading(true)
         logbook?.logs?.add(0, event)
         recyclerView.adapter?.notifyItemInserted(0)