WIP Moving CLI to command-like input.

cli/src/main/groovy/com/jdbernard/wdiwtlt/cli/CommandLineInterface.groovy

@@ -64,7 +64,7 @@ Configuration:
     private synchronized boolean running
 
     private String titleStyle, normalStyle, statusStyle, promptStyle,
-        artistStyle, albumStyle, fileStyle, errorStyle
+        artistStyle, albumStyle, fileStyle, errorStyle, playlistStyle
     private String clearLine = new ANSI().eraseLine(Erase.All).toString()
     private String afterInput =
         new ANSI().eraseLine(Erase.All).scrollUp().cursorUp().toString()
@@ -73,7 +73,8 @@ Configuration:
     private String afterLeader =
         new ANSI().restoreCursor().eraseLine(Erase.ToEnd).toString()
     private String eraseLeader =
-        new ANSI().cursorPrevLine().eraseLine(Erase.All).cursorPrevLine().eraseLine(Erase.All).toString()
+        new ANSI().cursorPrevLine().eraseLine(Erase.All).cursorPrevLine()
+            .eraseLine(Erase.All).toString()
 
     private int displayWidth = 79
     private long msgTimeout
@@ -216,15 +217,28 @@ Configuration:
             if (new Date() > dismissMsgDate) resetStatus()
             if (consoleReadBuffer.size() > 0) {
                 line = consoleReadBuffer.remove(0)
-                switch(line) {
-                    case ~/quit|exit|.+\u0004$/:
-                        running = false
-                        consoleReaderThread.interrupt()
-                        break
+                processInput(line.split(/\w/) as LinkedList)
+            } else {
+                drawLeader()
+                Thread.sleep(250)
+            }
+        }
+    }
 
-                    case 'scan':
-                        scanMediaLibrary()
-                        break
+    private def processInput(LinkedList<String> line) {
+        String command = line.poll()
+        switch(command.toLowerCase()) {
+            case 'album':   return selectAlbum(line)
+            case 'artist':  return selectArtist(line)
+            case 'scan':    return scanMediaLibrary()
+
+            case 'list':
+                String nextArg = line.poll()
+                if (nextArg.toLowerCase() == 'all')
+                    return processList(line, true)
+                else {
+                    if (nextArg) line.push(nextArg)
+                    return processList(line, false) }
 
             case 'debug':
                 outStream.println(
@@ -233,44 +247,17 @@ Configuration:
                              .join("\n") +
                     "\n\n\n")
                 drawLeader(true)
-                        break
+                return
 
-                    case "artist":
-                        selection.artist = null
-                        resetStatus()
-                        break
+            case 'q': case 'quit': case ':q': case 'exit': case '\u0004':
+                running = false
+                consoleReaderThread.interrupt()
+                return
 
-                    case ~/artist (.+)/:
-                        def input = Matcher.lastMatcher[0][1]?.trim()
-                        def match = library.getByIdOrName(input, Artist)
-                        if (!match) setErr("No artist matches '$input'.")
-                        else if (match.size() > 1)
-                            setErr("Multiple artists match '$input': " +
-                                match.collect { "${it.id}: ${it.name}" }
-                                     .join(", "))
-                        else {
-                            selection.artist = match[0]
-                            resetStatus() }
-                        break
-
-                    case "album":
                 selection.album = null
                 resetStatus()
                 break
 
-                    case ~/album (.+)/:
-                        def input = Matcher.lastMatcher[0][1]?.trim()
-                        def match = library.getByIdOrName(input, Album)
-                        if (!match) setErr("No album matches '$input'.")
-                        else if (match.size() > 1)
-                            setErr("Multiple albums match '$input': " +
-                                match.collect { "${it.id}: ${it.name}" }
-                                     .join(", "))
-                        else {
-                            selection.album = match[0]
-                            resetStatus() }
-                        break
-
             case "list artists for album":
                 if (!selection.album) {
                     setErr("No album is selected.")
@@ -319,18 +306,63 @@ Configuration:
                 Thread.sleep(250)
                 break
         }
-            } else {
-                drawLeader()
-                Thread.sleep(250)
+
     }
+
+    private def processList(LinkedList options, boolean all) {
+        def option = options.poll()
+        switch(option) {
+            case 'albums':
+            case 'artists':
+            case 'bookmarks':
+            case 'playlists':
+            default:
+                printLongMessage("Unrecognized option to the ${promptStyle}" +
+                    "list${normalStyle} command. Use ${promptStyle}help list" +
+                    "to see a list of valid options.")
+                return null
         }
     }
 
-    private void scanMediaLibrary() {
+    public Album selectAlbum(LinkedList input) {
+        String criteria = input.join(" ")
+
+        if (!criteria) { selection.album = null; resetStatus(); return null }
+
+        Album match = library.getByIdOrName(Album, criteria)
+
+        if (!match) { setErr("No album matches '$input'."); return null }
+        else if (match.size() > 1) {
+            setErr("Multiple albums match '$input': " +
+                match.collect { "${it.id}: ${it.name}" }.join(", "))
+            return null }
+
+        selection.album = match[0]
+        resetStatus()
+        return match[0] }
+
+    public void selectArtist(LinkedList input) {
+        String criteria = input.join(" ")
+
+        if (!criteria) { selection.artist = null; resetStatus(); return null }
+
+        Artist match = library.getByIdOrName(Artist, criteria)
+
+        if (!match) { setErr("No artist matches '$input'."); return null }
+        else if (match.size() > 1) {
+            setErr("Multiple artists match '$input': " +
+                match.collect { "${it.id}: ${it.name}" }.join(", "))
+            return null }
+        selection.artist = match[0]
+        resetStatus()
+        return match[0] }
+
+    public MediaLibrary scanMediaLibrary() {
         status.text = "Scanning media library..."
         library.rescanLibrary()
         status.text = "Scanned ? files."
-        dismissMsgDate = new Date(new Date().time + msgTimeout) }
+        dismissMsgDate = new Date(new Date().time + msgTimeout)
+        return library }
 
     private void drawLeader(afterOutput = false) {
 
@@ -342,6 +374,16 @@ Configuration:
         outStream.print(leader)
         outStream.flush() }
 
+    private void printLongMessage(String msg) {
+        String result = new StringBuilder()
+            .append(eraseLeader)
+            .append(msg)
+            .append("\n\n")
+            .toString()
+
+        outStream.println result
+        drawLeader(true) }
+
     private String getLeader() {
         StringBuilder leader = new StringBuilder()
             .append(clearLine)
@@ -393,6 +435,11 @@ Configuration:
     private String resetStatus() {
         StringBuilder s = new StringBuilder()
 
+        if (selection.playlist) s.append(playlistStyle)
+            .append(selection.playlist)
+            .append(normalStyle)
+            .append(": ")
+
         if (selection.artist) s.append(artistStyle)
             .append(selection.artist)
             .append(normalStyle)