Notes

Ejercicio 9

// Required external modules.
fs = require('fs');
path = require('path');
bb = require('bluebird');
os = require('os'); // Needed for the end-of-line constant, in order to be ed54dd822d4ba184e018f67ff52381b744959c77
// system-independent.

// Get a copy of the arguments array.
var argv = process.argv;
// Get the name of this JavaScript file, without the extension.
var scriptName = path.basename(argv[1], ".js");
// Current file name.
var filename = "";
// Information to be printed at the end.
var smallestFile = "";
var largestFile = "";
var smallestLength = 0;
var largestLength = 0;
var totalLength = 0;
var myFiles=[],names=[]
var totalBytes = 0, max =0, min = 0, minPos = 0, minPos = 0
var sizes = []
// Needed in the onFulfilled handler.
var numProcessed = 2;

/*********************************************************************/
/* Auxiliary functions. */
/*********************************************************************/

function onError(err) {
// If the file does not exist, print an error message.
console.log("Please use the name of an existant file!!");
}

function atTheEnd() {
console.log( "The shortest file is %s with %d bytes.", names[0], min );
console.log( "The largest file is %s with %d bytes.", names[1], max );
console.log( "The aggregate length of all files is %d bytes.", totalBytes );
}

//Useless functions
function processFileTest(data){
console.log("%d",data.length)

}
function processFile2(num) {
return function(data) {
console.log(process.argv[3+num])
console.log("%s: %d bytes", filename, data.length);

var myLength = data.length;
// Update overall results, if needed.
if (smallestFile == "" || myLength < smallestLength) {
smallestFile = filename;
smallestLength = myLength;
}
if (largestFile == "" || myLength > largestLength) {
largestFile = filename;
largestLength = myLength;
}
totalLength += myLength;

// Print the summary information when the last file is processed.
numProcessed++;
}
}

//My util functions
function onErrorFinal(){
console.log("Error leyendo algun archivo")
}
function processFile(num){
return function(data){
console.log("%s: %d bytes", process.argv[num+2], data.length);

var myLength = data.length;
totalBytes += myLength

if(myLength>max){
maxPos = num+2
max=myLength
}
if(myLength<min || min<=0){
minPos=num+2
min=myLength
}
console.log("Total de momento --> %d", totalBytes)
numProcessed++;
}
}

/********************************************************************/
/* Main programme. */
/********************************************************************/

// Check whether the needed arguments have been received or not.
if (argv.length<3) {
// If not, print usage instructions and exit.
console.log("Usage: node " + scriptName + " files");
console.log("Print the length of every file received as argument.");
console.log("If multiple files are given, print also their aggregate length.");
process.exit();
}

// Convert fs.readFile() into a promise.
readPromise = bb.promisify(fs.readFile,fs);

//MY CODE ----------------------
var numFiles = process.argv.length-2, allLength=0
for(var i = 0;i<numFiles;i++){
console.log("Documento ",process.argv[2+i]," leido")
names[i]=process.argv[2+i]
myFiles[i]=bb.promisify(fs.readFile)(names[i],"utf8")
}
for(var i=0;i<numFiles;i++){
myFiles[i].then(processFile(i), onError)
}

bb.all(myFiles).then(atTheEnd,onErrorFinal);

//MY CODE ENDS -----------------


// Invoke the promises and wait for their results.
//for (var i=2; i<argv.length; i++) {
// Set the current filename.
//filename=argv[i];
// Use the promise.
//readPromise(argv[i], "utf8").then(processFile,onError);
//}