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wp-content/plugins/file-manager-advanced/application/library/js/commands/duplicate.js

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+/**
+ * @class elFinder command "duplicate"
+ * Create file/folder copy with suffix "copy Number"
+ *
+ * @type  elFinder.command
+ * @author  Dmitry (dio) Levashov
+ */
+elFinder.prototype.commands.duplicate = function() {
+	"use strict";
+	var fm = this.fm;
+	
+	this.getstate = function(select) {
+		var sel = this.files(select),
+			cnt = sel.length,
+			filter = function(files) {
+				var fres = true;
+				return $.grep(files, function(f) {
+					fres = fres && f.read && f.phash === fm.cwd().hash && ! fm.isRoot(f)? true : false;
+					return fres;
+				});
+			};
+
+		return cnt && fm.cwd().write && filter(sel).length == cnt ? 0 : -1;
+	};
+	
+	this.exec = function(hashes) {
+		var fm     = this.fm,
+			files  = this.files(hashes),
+			cnt    = files.length,
+			dfrd   = $.Deferred()
+				.fail(function(error) {
+					error && fm.error(error);
+				}), 
+			args = [];
+			
+		if (! cnt) {
+			return dfrd.reject();
+		}
+		
+		$.each(files, function(i, file) {
+			if (!file.read || !fm.file(file.phash).write) {
+				return !dfrd.reject(['errCopy', file.name, 'errPerm']);
+			}
+		});
+		
+		if (dfrd.state() == 'rejected') {
+			return dfrd;
+		}
+		
+		return fm.request({
+			data   : {cmd : 'duplicate', targets : this.hashes(hashes)},
+			notify : {type : 'copy', cnt : cnt},
+			navigate : {
+				toast : {
+					inbuffer : {msg: fm.i18n(['complete', fm.i18n('cmdduplicate')])}
+				}
+			}
+		});
+		
+	};
+
+};