I am trying to use antlr to generate javascript code. and use it to change the tokens (nodes) in my grammer.
I am able to visit the nodes , enter the node and print the value, or exit the node and print the node value.
I want to replace a token of a node if it is a expression.
like if expression is a+1 , I want to replace the expression to replacedString+1
/**
* #author:saurabh
* sample programme to run the parser for a sample string using antlr
*/
/**
* dependency injection
*/
var antlr4 = require('antlr4/index');
var helloListener = require('./helloListener').helloListener;
var helloLexer = require('./helloLexer');
var helloParser = require('./helloParser');
var helloVisitor = require('./helloVisitor').helloVisitor;
var toRun = function (ruleForEnterAndExitOverride,ruleForgeneratiingTree, inputExpressionString, changeTokenString) {
var chars = new antlr4.InputStream(inputExpressionString);
var lexer = new helloLexer.helloLexer(chars);
var tokens = new antlr4.CommonTokenStream(lexer);
var parser = new helloParser.helloParser(tokens);
console.log(tokens)
//var visitor = new helloVisitor.helloVisitor();
parser.buildParseTrees = true;
var tree = parser.expression();
var keyPrinter = function () {
helloListener.call(this);
return this;
};
keyPrinter.prototype = Object.create(helloListener.prototype);
keyPrinter.prototype.constructor = keyPrinter;
//visitor
var keyVisitor = function(){
helloVisitor.call(this);
return this;
}
keyVisitor.prototype = Object.create(helloVisitor.prototype);
keyVisitor.prototype.constructor = keyVisitor;
//var tree1 = parser.prog();
//override funciton
keyPrinter.prototype["enter" + ruleForEnterAndExitOverride] = function (ctx) {
//var newVal = ctx.getText().replace(ctx.getText(),changeTokenString);
console.log("enter"+ctx.getText());
console.log("enter",ctx.start,ctx.end)
//console.log(ctx.quotedIdentifier())
return "hi";
}
keyPrinter.prototype["exit"+ ruleForEnterAndExitOverride] = function (ctx) {
//var newVal = ctx.getText().replace(ctx.getText(),changeTokenString);
console.log("exit"+ctx.getText());
}
keyVisitor.prototype["visit"+ruleForEnterAndExitOverride] = function(ctx){
console.log("visit"+ctx.getText())
//var newString = ctx.getText().replace(ctx.getText(),changeTokenString);
//return newString;
//console.log(ctx)
}
var visitor = new keyVisitor();
var test = visitor["visit"+ruleForEnterAndExitOverride](tree);
var printer = new keyPrinter();
antlr4.tree.ParseTreeWalker.DEFAULT.walk(printer, tree);
//console.log("out",test)
}
/**
* #param: ruleFor appending to the listner funciton (starts with capital character of rule name)
* #param: rule name to generate tree. without any change
* #param: expression to test
* #param: new value to be replaced from the #param3 expression
*/
toRun("QuotedIdentifier","quotedIdentifier", "`a`+1", "p");
in java doc of antlr its mentioned to use rewritabletokenstreem but I am not able to find a way to do the same in javascript.
Please help
Related
I have a loop in which I am calling rec_append() recursively, apparently the first pass alone works, then the loop stops.
I have an array of 4 elements going into that $.each loop but I see only the first element going into the function recursively. Help!
I switched it for a element.forEach but that gives me only the second element and I am stuck, is there a better solution to process a tree of elements? My array is a part of a tree.
var data = JSON.parse(JSON.stringify(result))
var graph = $(".entry-point");
function rec_append(requestData, parentDiv) {
var temp_parent_details;
$.each(requestData, function (index, jsonElement) {
if (typeof jsonElement === 'string') {
//Element construction
//Name and other details in the form of a : delimited string
var splitString = jsonElement.split(':');
var details = document.createElement("details");
var summary = document.createElement("summary");
summary.innerText = splitString[0];
details.append(summary);
temp_parent_details = details;
parentDiv.append(details);
var kbd = document.createElement("kbd");
kbd.innerText = splitString[1];
summary.append(' ');
summary.append(kbd);
var div = document.createElement("div");
div.className = "col";
details.append(div);
var dl = document.createElement("dl");
div.append(dl);
var dt = document.createElement("dt");
dt.className = "col-sm-1";
dt.innerText = "Path";
div.append(dt);
var dd = document.createElement("dd");
dd.className = "col-sm-11";
dd.innerText = splitString[2];
div.append(dd);
var dt2 = document.createElement("dt");
dt2.className = "col-sm-1";
dt2.innerText = "Type";
div.append(dt2);
var dd2 = document.createElement("dd");
dd2.className = "col-sm-11";
dd2.innerText = splitString[1];
div.append(dd2);
} else {
$.each(jsonElement, function (jsonElementArrIndx, jsonChildElement) {
rec_append(jsonChildElement, temp_parent_details); //Only 1 pass works, rest skip
});
}
});
}
rec_append(data, graph);
Sample data:enter image description here
I have this code. I want to loop through the array and create a new doc for each entry. If I manually set the loop length to the number of rows it works fine. I want to set it to loop for the length of the array. However the .length property always returns null. What am I missing. I have also tried for each loops with no luck.
function createDocument()
{
//var headers = Sheets.Spreadsheets.Values.get('fileID', 'A1:Z1');
var studentHistory = Sheets.Spreadsheets.Values.get('fileID', 'A2:Z200');
var templateId = 'fileID';
var documentId;
var dstFolder = DriveApp.getFolderById('folderID');
var length = studentHistory.length;
Logger.log(studentHistory);
Logger.log(length);
//Loop through rows in sheet
for (var i = 0; i < length; i++){
//Get values from sheet row
var date = studentHistory.values[i][0];
var studentName = studentHistory.values[i][1];
var dob = studentHistory.values[i][2];
var pcDoctor = studentHistory.values[i][3];
var address = studentHistory.values[i][4];
var fgName = studentHistory.values[i][5];
var mgName = studentHistory.values[i][6];
var phoneMom = studentHistory.values[i][7];
var phoneDad = studentHistory.values[i][8];
var empMom = studentHistory.values[i][9];
var empDad = studentHistory.values[i][10];
var livesWith = studentHistory.values[i][11];
var childrenInHome = studentHistory.values[i][12];
var childrenNotInHome = studentHistory.values[i][13];
var othersInHome = studentHistory.values[i][14];
var illnesses = studentHistory.values[i][15];
var illnessDetails = studentHistory.values[i][16];
var hospitalizations = studentHistory.values[i][17];
var hospDetails = studentHistory.values[i][18];
var trauma = studentHistory.values[i][19];
var traumaDetails = studentHistory.values[i][20];
var injuries = studentHistory.values[i][21];
var injuryDetails = studentHistory.values[i][22];
var medications = studentHistory.values[i][23];
var additionalComments = studentHistory.values[i][24];
var otherSchools = studentHistory.values[i][25];
//Make a copy of the template file
documentId = DriveApp.getFileById(templateId).makeCopy(dstFolder).getId();
//Change name of newly created document
DriveApp.getFileById(documentId).setName('SocialHistory_' + studentName + '_' + date);
var body = DocumentApp.openById(documentId).getBody();
//Insert values
body.replaceText('<<date>>', date);
body.replaceText('<<studentName>>', studentName);
body.replaceText('<<dob>>', dob);
body.replaceText('<<pcDoctor>>', pcDoctor);
body.replaceText('<<address>>', address);
body.replaceText('<<fgName>>', fgName);
body.replaceText('<<mgName>>', mgName);
body.replaceText('<<phoneMom>>', phoneMom);
body.replaceText('<<phoneDad>>', phoneDad);
body.replaceText('<<empMom>>', empMom);
body.replaceText('<<empDad>>', empDad);
body.replaceText('<<livesWithe>>', livesWith);
body.replaceText('<<childrenInHome>>', childrenInHome);
body.replaceText('<<childrenNotInHome>>', childrenNotInHome);
body.replaceText('<<othersInHome>>', othersInHome);
body.replaceText('<<illnesses>>', illnesses);
body.replaceText('<<illnessDetails>>', illnessDetails);
body.replaceText('<<hospitalizations>>', hospitalizations);
body.replaceText('<<hospDetails>>', hospDetails);
body.replaceText('<<trauma>>', trauma);
body.replaceText('<<traumaDetails>>', traumaDetails);
body.replaceText('<<injuries>>', injuries);
body.replaceText('<<injuryDetails>>', injuryDetails);
body.replaceText('<<medications>>', medications);
body.replaceText('<<additionalComments>>', additionalComments);
body.replaceText('<<otherSchools>>', otherSchools);
}
}
studentHistory.values is the array.
Therefore, try this instead to get the length:
var length = studentHistory.values.length;
Solution
I see you are using Advanced Google Services to call the Sheets API. This Apps Script class allows you to call the Google APIs directly from your script handling automatically the authorization process.
However it doesn't work as the built in Classes that are available for example inside the SpreadsheetApp wrapper.
Your request will return an HTTP-like response following these specifications:
{
"range": string,
"majorDimension": enum (Dimension),
"values": [
array
]
}
You will need to parse these responses in order to achieve the desired result.
Proposed modification
function createDocument()
{
//var headers = Sheets.Spreadsheets.Values.get('fileID', 'A1:Z1');
var studentHistory = Sheets.Spreadsheets.Values.get('fileID', 'A2:Z200');
var templateId = 'fileID';
var documentId;
var dstFolder = DriveApp.getFolderById('folderID');
var length = studentHistory.values.length;
...
Reference
Google Sheets API
Advanced Google Services
I'm trying to have a function run with a time-driven (clock) trigger. My issue is, the function needs variables sent to it as parameters. Normally if I'm not using a trigger I'll just send it directly like this.
<script>
function runFunction(){
google.script.run.myFunction(x,y,z);
}
</script>
And on the server side, I'll call them easily.
function myFunction(x,y,z){
var a = x;
var b = y;
var c = z;
Logger.log(a+b+c);
}
But when I'm using a time-driven (clock) trigger to run the function how can I get x,y,z into the function.
I searched around and saw one method of creating scriptProperties out of the parameters in the trigger function like this.
EDITED This is the actual code.
Client side.
<script>
function sendCall() {
var testNumber = document.getElementById('numberCall').value;
var testGroup = document.getElementById('groupsCall').value;
var testtime = document.getElementById('scheduleCall').value;
var now = document.getElementsByName('sendTimeCall')[0].checked;
var number;
if(testNumber == ''){
number = null;
}else{
number = testNumber;
}
var group;
if(testGroup == ""){
group = null;
}else{
group = testGroup;
}
var time;
if(testtime == ''){
time = null;
}else{
time = testtime;
}
var file = document.getElementsByName('audio')[0].files[0];
var name = file.name;
var reader = new FileReader();
reader.onload = function (e) {
var content = reader.result;
google.script.run.withSuccessHandler(success2).triggerCall(group, number, content, time, now, name);
return false;
}
reader.readAsDataURL(file);
}
</script>
Server side - Trigger Function.
function triggerCall(group, number, content, time, now, name){
var scriptProperties = PropertiesService.getScriptProperties();
scriptProperties.setProperties({
'GROUP_CALL': group,
'AUDIO': content,
'NUMBER_CALL': number,
'FILE_NAME': name
});
var status;
if(now){
status = 'Call Sent';
}else{
status = 'Call Scheduled';
}
if(now){
return makeCall(status);
}else{
// Set here the date you want to schedule the one-time trigger
var rawdate = time;
var today_D = new Date(new Date().toLocaleString("en-US", {timeZone: "America/New_York"}));
var scheduled_D = new Date(rawdate);
var time_af = Math.abs(scheduled_D - today_D) / 36e5;
ScriptApp.newTrigger("makeCall")
.timeBased()
.after(time_af * 60 *60 * 1000)
.create();
}
return status;
}
Server side - Here is The function that actually does the work.
function makeCall(status) {
var scriptProperties = PropertiesService.getScriptProperties();
var blob = scriptProperties.getProperty('AUDIO');
var number = scriptProperties.getProperty('NUMBER_CALL');
var group = scriptProperties.getProperty('GROUP_CALL');
var name = scriptProperties.getProperty('FILE_NAME');
var fullNumber;
if(group){
var ss = SpreadsheetApp.openById('xxxxxxxxxxxxxxxxxxx');
var sheet = ss.getSheetByName(group)
var length = sheet.getLastRow();
var values = sheet.getRange(1, 1, length).getValues();
fullNumber = values.flat();
}else{
var num = number;
var prefix = '+1';
var removeDashes = num.replace(/-/g,"");
var format = prefix + removeDashes;
var comma = format.replace(/ /g, ' +1');
fullNumber = comma.split(' ')
}
//upload file to drive
var folder = DriveApp.getFolderById('xxxxxxxxxxxxxxxxxxxxxx');
var blob = blob.split(",");
var blob = Utilities.newBlob(Utilities.base64Decode(blob[1]), 'audio/mpeg', name);
var file = folder.createFile(blob);
file.setSharing(DriveApp.Access.ANYONE_WITH_LINK, DriveApp.Permission.VIEW);
var id = file.getId();
for (var i = 0; i < fullNumber.length; i++){
//the url with HTTP request to create a call and parameters
var callsUrl = "https://api.twilio.com/2010-04-01/Accounts/ACxxxxxxxxxxxxxxxx/Calls.json";
var payload = {
"To": fullNumber[i],
"From" : "+177777777",
"Twiml" : "<Response><Play>https://docs.google.com/uc?export=play&id=" + id + "</Play></Response>",
};
var options = {
"method" : "post",
"payload" : payload
};
options.headers = {
"Authorization" : "Basic " + Utilities.base64Encode("xxxxxxxxxxx:xxxxxxxx")
};
UrlFetchApp.fetch(callsUrl, options);
}
scriptProperties.deleteProperty('AUDIO');
scriptProperties.deleteProperty('NUMBER_CALL');
scriptProperties.deleteProperty('GROUP_CALL');
scriptProperties.deleteProperty('FILE_NAME');
return status;
}
The problem is when I run the above code without the file input it works, But when I run it as above the function doesn't work. I did some trouble shooting and I think it has to do with transferring the file as a Data URL via the properties method. Is there a limit to how long of a string the VALUE can be?
in a nut shell these are the 2 points of my question.
Any other ideas how to send parameters to a triggered function
How I could do it using PropertiesService.
I would like to propose the following modification.
Modification points:
I think that the reason of your issue might be due to the maximum data size for PropertiesService. In the current stage, it seems that "Properties total storage" is "500kB / property store". I thought that in this case, when you upload a file, the file size might be over than it.
In order to remove your issue, how about creating content as a temporal file and put the file ID to the PropertiesService?
When above points are reflected to your script, it becomes as follows.
Pattern 1:
In this pattern, content is saved as a temporal file and that is used in the function of makeCall().
triggerCall()
function triggerCall(group, number, content, time, now, name){
var scriptProperties = PropertiesService.getScriptProperties();
var tempFile = DriveApp.createFile("tempFile.txt", content, MimeType.PLAIN_TEXT); // Added
scriptProperties.setProperties({'GROUP_CALL': group,'AUDIO': tempFile.getId(),'NUMBER_CALL': number,'FILE_NAME': name}); // Modified
var status;
if(now){
status = 'Call Sent';
}else{
status = 'Call Scheduled';
}
if(now){
return makeCall(status);
}else{
var rawdate = time;
var today_D = new Date(new Date().toLocaleString("en-US", {timeZone: "America/New_York"}));
var scheduled_D = new Date(rawdate);
var time_af = Math.abs(scheduled_D - today_D) / 36e5;
ScriptApp.newTrigger("makeCall").timeBased().after(time_af * 60 *60 * 1000).create();
}
return status;
}
makeCall()
function makeCall(status) {
var scriptProperties = PropertiesService.getScriptProperties();
var tempfileId = scriptProperties.getProperty('AUDIO'); // Modified
var number = scriptProperties.getProperty('NUMBER_CALL');
var group = scriptProperties.getProperty('GROUP_CALL');
var name = scriptProperties.getProperty('FILE_NAME');
var fullNumber;
if(group){
var ss = SpreadsheetApp.openById('xxxxxxxxxxxxxxxxxxx');
var sheet = ss.getSheetByName(group)
var length = sheet.getLastRow();
var values = sheet.getRange(1, 1, length).getValues();
fullNumber = values.flat();
}else{
var num = number;
var prefix = '+1';
var removeDashes = num.replace(/-/g,"");
var format = prefix + removeDashes;
var comma = format.replace(/ /g, ' +1');
fullNumber = comma.split(' ')
}
var folder = DriveApp.getFolderById('xxxxxxxxxxxxxxxxxxxxxx');
var tempFile = DriveApp.getFileById(tempfileId); // Added
var text = tempFile.getBlob().getDataAsString(); // Added
tempFile.setTrashed(true); // Added
var blob = text.split(","); // Modified
var blob = Utilities.newBlob(Utilities.base64Decode(blob[1]), 'audio/mpeg', name);
var file = folder.createFile(blob);
file.setSharing(DriveApp.Access.ANYONE_WITH_LINK, DriveApp.Permission.VIEW);
var id = file.getId();
for (var i = 0; i < fullNumber.length; i++){
var callsUrl = "https://api.twilio.com/2010-04-01/Accounts/ACxxxxxxxxxxxxxxxx/Calls.json";
var payload = {"To": fullNumber[i],"From" : "+177777777","Twiml" : "<Response><Play>https://docs.google.com/uc?export=play&id=" + id + "</Play></Response>"};
var options = {"method" : "post","payload" : payload};
options.headers = {"Authorization" : "Basic " + Utilities.base64Encode("xxxxxxxxxxx:xxxxxxxx")};
UrlFetchApp.fetch(callsUrl, options);
}
scriptProperties.deleteProperty('AUDIO');
scriptProperties.deleteProperty('NUMBER_CALL');
scriptProperties.deleteProperty('GROUP_CALL');
scriptProperties.deleteProperty('FILE_NAME');
return status;
}
Pattern 2:
In this pattern, content is saved to a file as the decoded data and that is used in the function of makeCall().
triggerCall()
function triggerCall(group, number, content, time, now, name){
var scriptProperties = PropertiesService.getScriptProperties();
var folder = DriveApp.getFolderById('xxxxxxxxxxxxxxxxxxxxxx'); // Added
var blob = content.split(","); // Added
var blob = Utilities.newBlob(Utilities.base64Decode(blob[1]), 'audio/mpeg', name); // Added
var file = folder.createFile(blob); // Added
scriptProperties.setProperties({'GROUP_CALL': group,'AUDIO': file.getId(),'NUMBER_CALL': number,'FILE_NAME': name}); // Modified
var status;
if(now){
status = 'Call Sent';
}else{
status = 'Call Scheduled';
}
if(now){
return makeCall(status);
}else{
var rawdate = time;
var today_D = new Date(new Date().toLocaleString("en-US", {timeZone: "America/New_York"}));
var scheduled_D = new Date(rawdate);
var time_af = Math.abs(scheduled_D - today_D) / 36e5;
ScriptApp.newTrigger("makeCall").timeBased().after(time_af * 60 *60 * 1000).create();
}
return status;
}
makeCall()
function makeCall(status) {
var scriptProperties = PropertiesService.getScriptProperties();
var fileId = scriptProperties.getProperty('AUDIO'); // Modified
var number = scriptProperties.getProperty('NUMBER_CALL');
var group = scriptProperties.getProperty('GROUP_CALL');
var name = scriptProperties.getProperty('FILE_NAME');
var fullNumber;
if(group){
var ss = SpreadsheetApp.openById('xxxxxxxxxxxxxxxxxxx');
var sheet = ss.getSheetByName(group)
var length = sheet.getLastRow();
var values = sheet.getRange(1, 1, length).getValues();
fullNumber = values.flat();
}else{
var num = number;
var prefix = '+1';
var removeDashes = num.replace(/-/g,"");
var format = prefix + removeDashes;
var comma = format.replace(/ /g, ' +1');
fullNumber = comma.split(' ')
}
var file = DriveApp.getFileById(fileId); // Modified
file.setSharing(DriveApp.Access.ANYONE_WITH_LINK, DriveApp.Permission.VIEW);
var id = file.getId();
for (var i = 0; i < fullNumber.length; i++){
var callsUrl = "https://api.twilio.com/2010-04-01/Accounts/ACxxxxxxxxxxxxxxxx/Calls.json";
var payload = {"To": fullNumber[i],"From" : "+177777777","Twiml" : "<Response><Play>https://docs.google.com/uc?export=play&id=" + id + "</Play></Response>"};
var options = {"method" : "post","payload" : payload};
options.headers = {"Authorization" : "Basic " + Utilities.base64Encode("xxxxxxxxxxx:xxxxxxxx")};
UrlFetchApp.fetch(callsUrl, options);
}
scriptProperties.deleteProperty('AUDIO');
scriptProperties.deleteProperty('NUMBER_CALL');
scriptProperties.deleteProperty('GROUP_CALL');
scriptProperties.deleteProperty('FILE_NAME');
return status;
}
Note:
In this modified script, when a file is uploaded, content is saved as a temporal file and the file ID is put to the PropertiesService. When makeCall is run, content is retrieved by the file ID and convert to the blob and saved it as a file. And the temporal file is removed. By this, the limitation of PropertiesService can be cleared.
But, in the current stage, the maximum blob size of Google Apps Script is 50 MB (52,428,800 bytes). So when the uploaded file size is over 50 MB, an error occurs. In this case, the file is converted to the base64 data. So, the maximum size is the size of base64 data. Please be careful this.
Reference:
Current limitations
I want use jslib to get url parameter
code like this
jslib
GetUrl: function(){
var s ="";
var strUrl = window.location.search;
var getSearch = strUrl.split("?");
var getPara = getSearch[1].split("&");
var v1 = getPara[0].split("=");
alert(v1[1]);
return v1[1];
},
});
c#
[DllImport("__Internal")]
public static extern string GetUrl();
void Start () {
TextShow.text = GetUrl();
}
When run alert from jslib , I see right string show in alert but UGUI Text shows nothing.
Why did this happen?
To return string from Javascript to Unity, you must use _malloc to allocate memory then writeStringToMemory to copy the string data from your v1[1] variable into the newly allocated memory then return that.
GetUrl: function()
{
var s ="";
var strUrl = window.location.search;
var getSearch = strUrl.split("?");
var getPara = getSearch[1].split("&");
var v1 = getPara[0].split("=");
alert(v1[1]);
//Allocate memory space
var buffer = _malloc(lengthBytesUTF8(v1[1]) + 1);
//Copy old data to the new one then return it
writeStringToMemory(v1[1], buffer);
return buffer;
}
The writeStringToMemory function seems to be deprecated now but you can still do the-same thing with stringToUTF8 and proving the size of the string in its third argument.
GetUrl: function()
{
var s ="";
var strUrl = window.location.search;
var getSearch = strUrl.split("?");
var getPara = getSearch[1].split("&");
var v1 = getPara[0].split("=");
alert(v1[1]);
//Get size of the string
var bufferSize = lengthBytesUTF8(v1[1]) + 1;
//Allocate memory space
var buffer = _malloc(bufferSize);
//Copy old data to the new one then return it
stringToUTF8(v1[1], buffer, bufferSize);
return buffer;
}
I have a class called TileStreamer that I am currently defining as follows:
function TileStreamer {
};
This class has constants, which I define as follows:
// Tiles are 256 x 256 pixels
TileStreamer.prototype.TILE_SIZE = 256;
// Header size in bytes
TileStreamer.prototype.HEADER_SIZE = 28;
// Various table entry sizes in bytes
TileStreamer.prototype.RESOLUTION_ENTRY_SIZE = 12;
TileStreamer.prototype.TILE_COUNT_SIZE = 4;
TileStreamer.prototype.TILE_ENTRY_SIZE = 12;
// Offsets within header
TileStreamer.prototype.WIDTH_OFFSET = 3;
TileStreamer.prototype.HEIGHT_OFFSET = 4;
TileStreamer.prototype.NUM_TABLES_OFFSET = 7;
TileStreamer.prototype.UNPOPULATED_OFFSET = 12092;
There also other variables. These variables are important because they need to be accessible from other classes. They get their values within the methods of this class. This is what I am unsure of as far as structure. What I'm currently trying is:
TileStreamer.prototype.header;
TileStreamer.prototype.resolutionEntry;
TileStreamer.prototype.resolutionTable;
TileStreamer.prototype.filepath;
TileStreamer.prototype.s3;
TileStreamer.prototype.level;
TileStreamer.prototype.ncols;
TileStreamer.prototype.nrows;
TileStreamer.prototype.nlevels;
TileStreamer.prototype.toffset;
TileStreamer.prototype.tsize;
TileStreamer.prototype.modifiedTime;
TileStreamer.prototype.tile;
TileStreamer.prototype.host;
TileStreamer.prototype.bucket;
This class also has methods such as:
TileStreamer.prototype.Init = function(filepath, index, s3config){
var retval = false;
AWS.config.update({accessKeyId: s3config.access_key, secretAccessKey: s3config.secret_key});
var blc = new BlockLibraryConfigs();
var awsConfig = blc.awsConfig;
AWS.config.update({region: awsConfig.region});
var aws = new AWS.S3();
var params = {
Bucket: s3config.bucket,
Key: s3config.tile_directory + filepath,
Range: 'bytes=0-' + (this.HEADER_SIZE - 1)
};
aws.getObject(params, function(err, data){
if(err == null){
TileStreamer.modifiedTime = data.LastModified;
var header = bufferpack.unpack('<7I', data.Body);
TileStreamer.header = header;
TileStreamer.nlevels = header[TileStreamer.NUM_TABLES_OFFSET];
if(TileStreamer.nlevels == 5){
TileStreamer.level = 0;
TileStreamer.ncols = Math.ceil((header[TileStreamer.WIDTH_OFFSET] * 1.0) / TileStreamer.TILE_SIZE);
TileStreamer.nrows = Math.ceil((header[TileStreamer.HEIGHT_OFFSET] * 1.0) / TileStreamer.TILE_SIZE);
}
}
});
};
The method above should set some of the values of the variables, such as modifiedTime so that I can access it in another class such as:
TileStreamer = require('tilestreamer.js');
var ts = new TileStreamer();
ts.Init(parPath, index, config);
var last_modified = ts.modifiedTime;
Just put any public properties you want to initialise when the object is created, directly in the init function. Here's a small example...
function TileStreamer() {
};
TileStreamer.prototype.Init = function() {
this.modifiedTime = new Date();
};
var ts = new TileStreamer();
ts.Init();
console.log(ts);
jsfiddle example
https://jsfiddle.net/v6muohyk/
To get around the issue you're having with setting the object properties in a callback from an asynchronous function, just create a locally accessible variable to reference the object that you are creating at that time...
TileStreamer.prototype.Init = function() {
var thisTileStreamer = this;
asynchFunction(function(err, data) {
thisTileStreamer.modifiedTime = data.lastModified;
});
};
To take it one step further, if you need to execute some code after the init function has completed, then that will require waiting for the asynchronous function to complete, as well. For that, pass a further parameter to init, that is a function to be executed after all the work is done...
TileStreamer.prototype.Init = function(callback) {
var thisTileStreamer = this;
asynchFunction(function(err, data) {
thisTileStreamer.modifiedTime = data.lastModified;
callback();
});
};
var ts = new TileStreamer();
ts.Init(function() {
// put code here that needs to be executed *after* the init function has completed
alert(ts.modifiedTime);
});