Adding a new Internal Command

This is an example of a script add-in that adds a new internal command to Opus.

This command, SelectNewest, selects one or more of the newest files in the current folder. You would use this by creating a new .js file in the Script Addins folder (type /dopusdata/Script Addins into the location field to find this).

You could then create a button or hotkey to run the SelectNewest command just like any other internal Opus command.

The basic procedure to add an internal command from a script add-in is:

• Either:
  • In the OnInit event, create a ScriptCommand object with the ScriptInitData.AddCommand method.
  • Or, in the OnAddCommands event, create a ScriptCommand object with the AddCmdData.AddCommand method.
• Initialize the properties of the ScriptCommand object. At a minimum you must populate the name and method properties.
• Create a separate function in your script-add in, with the method name you specified for the command. This will be your command's entry point.

// The OnInit function is called by Directory Opus to initialize the script add-in
function OnInit(initData) {

    // Provide basic information about the script by initializing the properties of the ScriptInitData object
    initData.name = "Select Newest Files";
    initData.desc = "Select the newest X files in the folder";
    initData.copyright = "(c) 2014 Jonathan Potter";
    initData.default_enable = true;

  // Create a new ScriptCommand object and initialize it to add the command to Opus
    var cmd = initData.AddCommand();
    cmd.name = "SelectNewest";
    cmd.method = "OnSelectNewest";
    cmd.desc = initData.desc;
    cmd.label = "Select Newest Files";
    cmd.template = "NUMBER/N,FROM/K/N,NODESELECT/S";
}

// Implement the SelectNewest command (this entry point is an OnScriptCommand event).

// The name of this function must correspond to the value specified for the method property when the command was added in OnInit
function OnSelectNewest(scriptCmdData) {

    // scriptCmdData is a ScriptCommandData object, and it provides the raw command-line and a Func object.

    // The Func object contains an Args object, which in turn contains our parsed arguments (if any), usually preferable to using the raw command-line.

    // we use the got_arg object to test if an argument was provided, before reading its value

    // First get the starting index to select from, from the FROM argument. Default to 0 (newest) if not supplied.
    iStartPos = 0;
    if ( scriptCmdData.func.args.got_arg.from ) iStartPos = scriptCmdData.func.args.from;
 
    // Next get the number of files to select, from the NUMBER argument. Default to 1 if not supplied
    iNumber = 1;
    if ( scriptCmdData.func.args.got_arg.number ) iNumber = scriptCmdData.func.args.number;
 
    // The func.sourcetab property returns a Tab object representing the function's source tab

    // We create an enumerator for files in the source tab (sourcetab.files).

    // To change this to operate on files and folders rather than just files, use sourcetab.all instead

var objEnum = new Enumerator( scriptCmdData.func.sourcetab.files );

// build an Array of the files so we can sort it
    var objFiles = new Array();
    i = 0;
    while (!objEnum.atEnd()) {
        objFiles[i++] = objEnum.item();
        objEnum.moveNext();
    }
  
    If (objFiles.length > 0) {

// Sort the array by the "modify" property. This will sort the file array

        // in order from newest to oldest
        objFiles.sort(function(a, b) {
            If (a.modify < b.modify)
                return 1;
            If (a.modify > b.modify)
                return -1;
            return 0;
        });

// By default we get given a Command object pre-filled for the current tab
        // we can use that instead of creating our own, but we need to clear
        // out its list of files if it has one already
        scriptCmdData.func.command.ClearFiles();
   
        // Starting from the specified start position, add the requested number
        // of files to the command object. Because we have sorted the array from newest

        // to oldest, this will automatically add the newest files to the command

for ( i = iStartPos; i < objFiles.length && i < iStartPos + iNumber; i++ ) {
            scriptCmdData.func.command.AddFile( objFiles[i] );
        }
   
        // Build the Select command line to run that will actually select the files.
        // The FROMSCRIPT argument is needed to select files from the command object.
        // The DESELECTNOMATCH argument is used to deselect all other files, unless the
        // script's NODESELECT argument was used.
   
        strCommand = "Select FROMSCRIPT";
        if (!scriptCmdData.func.args.got_arg.nodeselect)
            strCommand += " DESELECTNOMATCH";

// run the Select command via the Command object's RunCommand method
        scriptCmdData.func.command.RunCommand( strCommand );
    }

}