--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/name/blackcap/exifwasher/Files.kt	Tue Mar 31 13:24:48 2020 -0700
@@ -0,0 +1,85 @@
+/*
+ * For dealing with files.
+ */
+package name.blackcap.exifwasher
+
+import java.io.BufferedReader
+import java.io.File
+import java.io.FileInputStream
+import java.io.InputStreamReader
+import java.util.Properties
+import java.util.logging.FileHandler
+import java.util.logging.Level
+import java.util.logging.Logger
+import java.util.logging.SimpleFormatter
+
+/* OS Type */
+
+enum class OS {
+    MAC, UNIX, WINDOWS, OTHER;
+    companion object {
+        private val rawType = System.getProperty("os.name")?.toLowerCase()
+        val type = if (rawType == null) {
+                OTHER
+            } else if (rawType.contains("win")) {
+                WINDOWS
+            } else if (rawType.contains("mac")) {
+                MAC
+            } else if (rawType.contains("nix") || rawType.contains("nux") || rawType.contains("aix") || rawType.contains("sunos")) {
+                UNIX
+            } else {
+                OTHER
+            }
+    }
+}
+
+/* joins path name components to java.io.File */
+
+fun joinPath(base: String, vararg rest: String) = rest.fold(File(base), ::File)
+
+/* file names */
+
+private val SHORTNAME = "exifwasher"
+private val LONGNAME = "name.blackcap." + SHORTNAME
+private val HOME = System.getenv("HOME")
+private val APPDATA = System.getenv("APPDATA")
+val PF_DIR = when (OS.type) {
+    OS.MAC -> joinPath(HOME, "Library", "Application Support", LONGNAME)
+    OS.WINDOWS -> joinPath(APPDATA, "Roaming", LONGNAME)
+    else -> joinPath(HOME, "." + SHORTNAME)
+}
+val LF_DIR = when (OS.type) {
+    OS.MAC -> joinPath(HOME, "Library", "Application Support", LONGNAME)
+    OS.WINDOWS -> joinPath(APPDATA, "Local", LONGNAME)
+    else -> joinPath(HOME, "." + SHORTNAME)
+}
+val PROP_FILE = File(PF_DIR, SHORTNAME + ".properties")
+val LOG_FILE = File(LF_DIR, SHORTNAME + ".log")
+
+/* make some needed directories */
+
+private fun File.makeIfNeeded() = if (exists()) { true } else { mkdirs() }
+
+/* make some usable objects */
+
+val DPROPERTIES = Properties().apply {
+    OS::class.java.getResourceAsStream("default.properties").use { load(it) }
+}
+
+val PROPERTIES = Properties(DPROPERTIES).apply {
+    PF_DIR.makeIfNeeded()
+    PROP_FILE.createNewFile()
+    BufferedReader(InputStreamReader(FileInputStream(PROP_FILE), "UTF-8")).use  {
+        load(it)
+    }
+}
+
+val LOGGER = run {
+    LF_DIR.makeIfNeeded()
+    Logger.getLogger(LONGNAME).apply {
+        addHandler(FileHandler(LOG_FILE.toString()).apply {
+            formatter = SimpleFormatter() })
+        level = Level.CONFIG
+        useParentHandlers = false
+    }
+}