Create archive.js

lib/archive.js

@@ -0,0 +1,119 @@
+// archive.js
+// File archiver library for WelsonJS framework
+// Namhyeon Go (Catswords Research) <abuse@catswords.net>
+// https://github.com/gnh1201/welsonjs
+// 
+var SHELL = require("lib/shell");
+var FILE = require("lib/file");
+
+function ArchiveObject(engine) {
+    this.workingDirectory = "";
+    this.patterns = [];
+    this.readFormat = "";
+    this.writeFormat = "";
+    this.engine = null;
+    
+    this.setReadFormat = function(readFormat) {
+        this.readFormat = readFormat;
+        return this;
+    };
+    
+    this.setWriteFormat = function(writeFormat) {
+        this.writeFormat = writeFormat;
+        return this;
+    };
+    
+    this.setEngine = function(engine) {
+        this.engine = engine;
+        
+        if (this.engine == "cabinet") {
+            this.setReadFormat("cab");
+            this.setWriteFormat("cab");
+        }
+        
+        // TODO: zip, 7z, rar
+        
+        return this;
+    };
+    
+    this.extractTo = function(filename, targetDirectory) {
+        var result;
+        
+        if (this.engine == "cabinet") {
+            // compress cab to target directory
+            result = SHELL.exec([
+                "expand",
+                filename,
+                targetDirectory
+            ]);
+        }
+        
+        return result;
+    };
+    
+    this.compressTo = function(filename) {
+        var result;
+        
+        // https://superuser.com/questions/658021/whats-the-best-way-to-create-a-cab-file-of-multiple-files-quickly
+        if (this.engine == "cabinet") {
+            var directives = this.buildDirectives();
+            
+            // create the directives file (temporary file)
+            var tmp = PipeIPC.connect("volatile");
+            tmp.write(directives);
+            var tmp_path = out.path;
+            tmp.close();
+            
+            // compress to cab
+            SHELL.exec([
+                "makecab",
+                "/d",
+                "CabinetName1=" + filename,
+                "/d",
+                "DiskDirectoryTemplate=" + this.workingDirectory,
+                "/f",
+                tmp_path
+            ]);
+            
+            // destroy the temporary file
+            tmp.destroy();
+        }
+        
+        return result;
+    };
+    
+    this.buildDirectives = function() {
+        var directives = [];
+        
+        if (this.engine == "cabinet") {
+            this.patterns.forEach(function(x) {
+                if (FILE.fileExists(x)) directives.push(x);
+            });
+        }
+        
+        return directives.join("\r\n");
+    };
+    
+    this.addFile = function(file) {
+        this.patterns.push(file);
+        return this;
+    };
+    
+    // set default engines
+    this.create = function() {
+        if (typeof engine === "undefined") {
+            this.setEngine("cabinet");
+        };
+    };
+    
+    this.create();
+}
+
+exports.create = function(engine) {
+    return new ArchiveObject(engine);
+};
+
+exports.VERSIONINFO = "File archiver library (archive.js) version 0.1-dev";
+exports.AUTHOR = "abuse@catswords.net";
+exports.global = global;
+exports.require = global.require;