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transatoshi
434
scripts/camera.js
Executable file
434
scripts/camera.js
Executable file
@@ -0,0 +1,434 @@
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// Use strict
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"use strict";
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// Classes
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// Camera class
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class Camera {
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// Public
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// Initialize
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static initialize() {
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// Initialize request index
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Camera.requestIndex = 0;
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// Create worker
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Camera.worker = new Worker(Camera.WORKER_FILE_LOCATION);
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// Window before unload event
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$(window).on("beforeunload", function() {
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// Get current request index
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var currentRequestIndex = Camera.requestIndex++;
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// Check if current request index is at the max safe integer
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if(currentRequestIndex === Number.MAX_SAFE_INTEGER)
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// Reset request index
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Camera.requestIndex = 0;
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// Send worker an uninitialize request
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Camera.worker.postMessage([
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// Request index
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currentRequestIndex,
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// Type
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Camera.UNINITIALIZE_REQUEST_TYPE
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]);
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// Terminate worker
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Camera.worker.terminate();
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});
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// Return promise
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return new Promise(function(resolve, reject) {
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// Worker on error
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Camera.worker["onerror"] = function() {
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// Reject error
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reject("Failed to create camera worker.");
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};
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// Worker on message
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Camera.worker["onmessage"] = function(event) {
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// Get message
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var message = event["data"];
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// Get message's request index
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var requestIndex = message[Camera.MESSAGE_REQUEST_INDEX_OFFSET];
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// Check message's type
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switch(message[Camera.MESSAGE_TYPE_OFFSET]) {
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// Initialize request type
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case Camera.INITIALIZE_REQUEST_TYPE:
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// Get message's status
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var status = message[Camera.MESSAGE_STATUS_OFFSET];
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// Check if worker initialized successfully
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if(status === Camera.STATUS_SUCCESS_VALUE)
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// Resolve
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resolve();
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// Otherwise
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else
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// Reject error
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reject("Failed to initialize camera worker.");
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// Break
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break;
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// Default
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default:
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// Get message's response
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var response = message[Camera.MESSAGE_RESPONSE_OFFSET];
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// Trigger response request index event
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$(document).trigger(Camera.RESPONSE_EVENT + requestIndex.toFixed(), [
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// Response
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response
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]);
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// Break
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break;
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}
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};
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// Get current request index
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var currentRequestIndex = Camera.requestIndex++;
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// Check if current request index is at the max safe integer
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if(currentRequestIndex === Number.MAX_SAFE_INTEGER)
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// Reset request index
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Camera.requestIndex = 0;
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// Send worker an initialize request
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Camera.worker.postMessage([
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// Request index
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currentRequestIndex,
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// Type
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Camera.INITIALIZE_REQUEST_TYPE,
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// URL query string
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Common.URL_QUERY_STRING_SEPARATOR + encodeURIComponent(Consensus.OVERRIDE_WALLET_TYPE_URL_PARAMETER_NAME).replace(/%20/ug, "+") + Common.URL_QUERY_STRING_PARAMETER_VALUE_SEPARATOR + encodeURIComponent(Consensus.walletTypeToText(Consensus.getWalletType())).replace(/%20/ug, "+") + Common.URL_QUERY_STRING_PARAMETER_SEPARATOR + encodeURIComponent(Consensus.OVERRIDE_NETWORK_TYPE_URL_PARAMETER_NAME).replace(/%20/ug, "+") + Common.URL_QUERY_STRING_PARAMETER_VALUE_SEPARATOR + encodeURIComponent(Consensus.networkTypeToText(Consensus.getNetworkType())).replace(/%20/ug, "+")
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]);
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});
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}
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// Get value
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static getValue(image, width, height) {
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// Create canvas
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var canvas = document.createElement("canvas");
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// Set canvas's dimensions
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canvas["width"] = width;
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canvas["height"] = height;
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// Draw image on canvas
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var context = canvas.getContext("2d");
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context.drawImage(image, 0, 0, width, height);
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// Get image's data from the canvas
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var imageData = context.getImageData(0, 0, width, height)["data"]["buffer"];
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// Return promise
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return new Promise(function(resolve, reject) {
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// Return sending decode request
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return Camera.sendRequest([
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// Type
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Camera.DECODE_REQUEST_TYPE,
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// Width
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width,
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// Height
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height,
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// Image data
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imageData
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], [
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// Image data
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imageData
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]).then(function(response) {
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// Check if response is no value
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if(response === Camera.NO_VALUE)
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// Resolve no value
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resolve(Camera.NO_VALUE);
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// Otherwise
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else {
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// Get data from response
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var data = response[Camera.RESPONSE_DATA_INDEX];
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// Get top left corner X from response
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var topLeftCornerX = response[Camera.RESPONSE_TOP_LEFT_CORNER_X_INDEX];
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// Get top left corner Y from response
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var topLeftCornerY = response[Camera.RESPONSE_TOP_LEFT_CORNER_Y_INDEX];
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// Get top right corner X from response
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var topRightCornerX = response[Camera.RESPONSE_TOP_RIGHT_CORNER_X_INDEX];
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// Get top right corner Y from response
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var topRightCornerY = response[Camera.RESPONSE_TOP_RIGHT_CORNER_Y_INDEX];
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// Get bottom left corner X from response
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var bottomLeftCornerX = response[Camera.RESPONSE_BOTTOM_LEFT_CORNER_X_INDEX];
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// Get bottom left corner Y from response
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var bottomLeftCornerY = response[Camera.RESPONSE_BOTTOM_LEFT_CORNER_Y_INDEX];
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// Get bottom right corner X from response
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var bottomRightCornerX = response[Camera.RESPONSE_BOTTOM_RIGHT_CORNER_X_INDEX];
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// Get bottom right corner Y from response
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var bottomRightCornerY = response[Camera.RESPONSE_BOTTOM_RIGHT_CORNER_Y_INDEX];
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// Resolve data
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resolve(data);
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}
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// Catch errors
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}).catch(function(error) {
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// Reject error
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reject(error);
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});
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});
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}
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// Initialize request type
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static get INITIALIZE_REQUEST_TYPE() {
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// Return initialize request type
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return 0;
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}
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// Uninitialize request type
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static get UNINITIALIZE_REQUEST_TYPE() {
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// Return uninitialize request type
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return Camera.INITIALIZE_REQUEST_TYPE + 1;
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}
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// Decode request type
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static get DECODE_REQUEST_TYPE() {
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// Return decode request type
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return Camera.UNINITIALIZE_REQUEST_TYPE + 1;
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}
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// Message request index offset
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static get MESSAGE_REQUEST_INDEX_OFFSET() {
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// Return message request index offset
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return 0;
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}
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// Message type offset
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static get MESSAGE_TYPE_OFFSET() {
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// Return message type offset
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return Camera.MESSAGE_REQUEST_INDEX_OFFSET + 1;
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}
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// Message initialize URL query string offset
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static get MESSAGE_INITIALIZE_URL_QUERY_STRING_OFFSET() {
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// Return message initialize URL query string offset
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return Camera.MESSAGE_TYPE_OFFSET + 1;
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}
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// Message width offset
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static get MESSAGE_WIDTH_OFFSET() {
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// Return message width offset
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return Camera.MESSAGE_TYPE_OFFSET + 1;
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}
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// Message height offset
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static get MESSAGE_HEIGHT_OFFSET() {
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// Return message height offset
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return Camera.MESSAGE_WIDTH_OFFSET + 1;
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}
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// Message image data offset
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static get MESSAGE_IMAGE_DATA_OFFSET() {
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// Return message image data offset
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return Camera.MESSAGE_HEIGHT_OFFSET + 1;
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}
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// Status success value
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static get STATUS_SUCCESS_VALUE() {
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// Return status success value
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return true;
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}
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// Status failed value
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static get STATUS_FAILED_VALUE() {
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// Return status failed value
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return false;
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}
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// No value
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static get NO_VALUE() {
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// Return no value
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return null;
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}
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// Private
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// Send request
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static sendRequest(request, transfer) {
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// Get current request index
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var currentRequestIndex = Camera.requestIndex++;
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// Check if current request index is at the max safe integer
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if(currentRequestIndex === Number.MAX_SAFE_INTEGER)
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// Reset request index
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Camera.requestIndex = 0;
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// Add current request index to request
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request.unshift(currentRequestIndex);
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// Return promise
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return new Promise(function(resolve, reject) {
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// Response current request index event
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$(document).one(Camera.RESPONSE_EVENT + currentRequestIndex.toFixed(), function(event, response) {
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// Resolve response
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resolve(response);
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});
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// Send worker the request
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Camera.worker.postMessage(request, transfer);
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});
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}
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// Message status offset
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static get MESSAGE_STATUS_OFFSET() {
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// Return message status offset
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return Camera.MESSAGE_TYPE_OFFSET + 1;
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}
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// Message response offset
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static get MESSAGE_RESPONSE_OFFSET() {
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// Return message response offset
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return Camera.MESSAGE_TYPE_OFFSET + 1;
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}
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// Response event
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static get RESPONSE_EVENT() {
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// Return response event
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return "CameraResponseEvent";
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}
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// Response data index
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static get RESPONSE_DATA_INDEX() {
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// Return response data index
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return 0;
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}
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// Response top left corner X index
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static get RESPONSE_TOP_LEFT_CORNER_X_INDEX() {
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// Return response top left corner X index
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return Camera.RESPONSE_DATA_INDEX + 1;
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}
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// Response top left corner Y index
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static get RESPONSE_TOP_LEFT_CORNER_Y_INDEX() {
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// Return response top left corner Y index
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return Camera.RESPONSE_TOP_LEFT_CORNER_X_INDEX + 1;
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}
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// Response top right corner X index
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static get RESPONSE_TOP_RIGHT_CORNER_X_INDEX() {
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// Return response top right corner X index
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return Camera.RESPONSE_TOP_LEFT_CORNER_Y_INDEX + 1;
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}
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// Response top right corner Y index
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static get RESPONSE_TOP_RIGHT_CORNER_Y_INDEX() {
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// Return response top right corner Y index
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return Camera.RESPONSE_TOP_RIGHT_CORNER_X_INDEX + 1;
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}
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// Response bottom left corner X index
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static get RESPONSE_BOTTOM_LEFT_CORNER_X_INDEX() {
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// Return response bottom left corner X index
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return Camera.RESPONSE_TOP_RIGHT_CORNER_Y_INDEX + 1;
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}
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// Response bottom left corner Y index
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static get RESPONSE_BOTTOM_LEFT_CORNER_Y_INDEX() {
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// Return response bottom left corner Y index
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return Camera.RESPONSE_BOTTOM_LEFT_CORNER_X_INDEX + 1;
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}
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// Response bottom right corner X index
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static get RESPONSE_BOTTOM_RIGHT_CORNER_X_INDEX() {
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// Return response bottom right corner X index
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return Camera.RESPONSE_BOTTOM_LEFT_CORNER_Y_INDEX + 1;
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}
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// Response bottom right corner Y index
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static get RESPONSE_BOTTOM_RIGHT_CORNER_Y_INDEX() {
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// Return response bottom right corner Y index
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return Camera.RESPONSE_BOTTOM_RIGHT_CORNER_X_INDEX + 1;
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}
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// Worker file location
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static get WORKER_FILE_LOCATION() {
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// Return worker file location
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return "." + getResource("./scripts/camera_worker.js");
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}
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}
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// Main function
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// Set global object's camera
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globalThis["Camera"] = Camera;
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