Fixed tesseract issue
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Matt authored and 
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@@ -1,6 +1,7 @@
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/**
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* @author n1474335 [n1474335@gmail.com]
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* @author mshwed [m@ttshwed.com]
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* @author Matt C [me@mitt.dev]
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* @copyright Crown Copyright 2019
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* @license Apache-2.0
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*/
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@@ -12,7 +13,7 @@ import { toBase64 } from "../lib/Base64.mjs";
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import { isWorkerEnvironment } from "../Utils.mjs";
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import Tesseract from "tesseract.js";
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const { TesseractWorker } = Tesseract;
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const { createWorker } = Tesseract;
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import process from "process";
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@@ -60,23 +61,30 @@ class OpticalCharacterRecognition extends Operation {
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const assetDir = isWorkerEnvironment() ? `${self.docURL}/assets/` : `${process.cwd()}/src/core/vendor/`;
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try {
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self.sendStatusMessage("Spinning up Tesseract worker...");
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const image = `data:${type};base64,${toBase64(input)}`;
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const worker = new TesseractWorker({
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const worker = createWorker({
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workerPath: `${assetDir}tesseract/worker.min.js`,
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langPath: `${assetDir}tesseract/lang-data`,
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corePath: `${assetDir}tesseract/tesseract-core.wasm.js`,
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});
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const result = await worker.recognize(image)
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.progress(progress => {
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logger: progress => {
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if (isWorkerEnvironment()) {
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self.sendStatusMessage(`Status: ${progress.status} - ${(parseFloat(progress.progress)*100).toFixed(2)}%`);
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self.sendStatusMessage(`Status: ${progress.status}${progress.status === "recognizing text" ? ` - ${(parseFloat(progress.progress)*100).toFixed(2)}%`: "" }`);
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}
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});
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}
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});
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await worker.load();
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self.sendStatusMessage("Loading English language...");
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await worker.loadLanguage("eng");
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self.sendStatusMessage("Intialising Tesseract API...");
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await worker.initialize("eng");
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self.sendStatusMessage("Finding text...");
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const result = await worker.recognize(image);
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if (showConfidence) {
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return `Confidence: ${result.confidence}%\n\n${result.text}`;
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return `Confidence: ${result.data.confidence}%\n\n${result.data.text}`;
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} else {
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return result.text;
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return result.data.text;
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}
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} catch (err) {
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throw new OperationError(`Error performing OCR on image. (${err})`);
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@@ -1,24 +0,0 @@
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var TesseractCoreWASM = (function() {
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var _scriptDir = typeof document !== 'undefined' && document.currentScript ? document.currentScript.src : undefined;
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return (
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function(TesseractCoreWASM) {
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TesseractCoreWASM = TesseractCoreWASM || {};
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var Module=typeof TesseractCoreWASM!=="undefined"?TesseractCoreWASM:{};var moduleOverrides={};var key;for(key in Module){if(Module.hasOwnProperty(key)){moduleOverrides[key]=Module[key]}}Module["arguments"]=[];Module["thisProgram"]="./this.program";Module["quit"]=(function(status,toThrow){throw toThrow});Module["preRun"]=[];Module["postRun"]=[];var ENVIRONMENT_IS_WEB=false;var ENVIRONMENT_IS_WORKER=false;var ENVIRONMENT_IS_NODE=false;var ENVIRONMENT_IS_SHELL=false;ENVIRONMENT_IS_WEB=typeof window==="object";ENVIRONMENT_IS_WORKER=typeof importScripts==="function";ENVIRONMENT_IS_NODE=typeof process==="object"&&typeof require==="function"&&!ENVIRONMENT_IS_WEB&&!ENVIRONMENT_IS_WORKER;ENVIRONMENT_IS_SHELL=!ENVIRONMENT_IS_WEB&&!ENVIRONMENT_IS_NODE&&!ENVIRONMENT_IS_WORKER;var scriptDirectory="";function locateFile(path){if(Module["locateFile"]){return Module["locateFile"](path,scriptDirectory)}else{return scriptDirectory+path}}if(ENVIRONMENT_IS_NODE){scriptDirectory=__dirname+"/";var nodeFS;var nodePath;Module["read"]=function shell_read(filename,binary){var ret;ret=tryParseAsDataURI(filename);if(!ret){if(!nodeFS)nodeFS=require("fs");if(!nodePath)nodePath=require("path");filename=nodePath["normalize"](filename);ret=nodeFS["readFileSync"](filename)}return binary?ret:ret.toString()};Module["readBinary"]=function readBinary(filename){var ret=Module["read"](filename,true);if(!ret.buffer){ret=new Uint8Array(ret)}assert(ret.buffer);return ret};if(process["argv"].length>1){Module["thisProgram"]=process["argv"][1].replace(/\\/g,"/")}Module["arguments"]=process["argv"].slice(2);process["on"]("uncaughtException",(function(ex){if(!(ex instanceof ExitStatus)){throw ex}}));process["on"]("unhandledRejection",abort);Module["quit"]=(function(status){process["exit"](status)});Module["inspect"]=(function(){return"[Emscripten Module object]"})}else if(ENVIRONMENT_IS_SHELL){if(typeof read!="undefined"){Module["read"]=function shell_read(f){var data=tryParseAsDataURI(f);if(data){return intArrayToString(data)}return read(f)}}Module["readBinary"]=function readBinary(f){var data;data=tryParseAsDataURI(f);if(data){return data}if(typeof readbuffer==="function"){return new Uint8Array(readbuffer(f))}data=read(f,"binary");assert(typeof data==="object");return data};if(typeof scriptArgs!="undefined"){Module["arguments"]=scriptArgs}else if(typeof arguments!="undefined"){Module["arguments"]=arguments}if(typeof quit==="function"){Module["quit"]=(function(status){quit(status)})}}else if(ENVIRONMENT_IS_WEB||ENVIRONMENT_IS_WORKER){if(ENVIRONMENT_IS_WORKER){scriptDirectory=self.location.href}else if(document.currentScript){scriptDirectory=document.currentScript.src}if(_scriptDir){scriptDirectory=_scriptDir}if(scriptDirectory.indexOf("blob:")!==0){scriptDirectory=scriptDirectory.substr(0,scriptDirectory.lastIndexOf("/")+1)}else{scriptDirectory=""}Module["read"]=function shell_read(url){try{var xhr=new XMLHttpRequest;xhr.open("GET",url,false);xhr.send(null);return xhr.responseText}catch(err){var data=tryParseAsDataURI(url);if(data){return intArrayToString(data)}throw err}};if(ENVIRONMENT_IS_WORKER){Module["readBinary"]=function readBinary(url){try{var xhr=new XMLHttpRequest;xhr.open("GET",url,false);xhr.responseType="arraybuffer";xhr.send(null);return new Uint8Array(xhr.response)}catch(err){var data=tryParseAsDataURI(url);if(data){return data}throw err}}}Module["readAsync"]=function readAsync(url,onload,onerror){var xhr=new XMLHttpRequest;xhr.open("GET",url,true);xhr.responseType="arraybuffer";xhr.onload=function xhr_onload(){if(xhr.status==200||xhr.status==0&&xhr.response){onload(xhr.response);return}var data=tryParseAsDataURI(url);if(data){onload(data.buffer);return}onerror()};xhr.onerror=onerror;xhr.send(null)};Module["setWindowTitle"]=(function(title){document.title=title})}else{}var out=Module["print"]||(typeof console!=="undefined"?console.log.bind(console):typeof print!=="undefined"?print:null);var err=Module["printErr"]||(typeof printErr!=="undefined"?printErr:typeof console!=="undefined"&&console.warn.bind(console)||out);for(key in moduleOverrides){if(moduleOverrides.hasOwnProperty(key)){Module[key]=moduleOverrides[key]}}moduleOverrides=undefined;var STACK_ALIGN=16;function staticAlloc(size){var ret=STATICTOP;STATICTOP=STATICTOP+size+15&-16;return ret}function dynamicAlloc(size){var ret=HEAP32[DYNAMICTOP_PTR>>2];var end=ret+size+15&-16;HEAP32[DYNAMICTOP_PTR>>2]=end;if(end>=TOTAL_MEMORY){var success=enlargeMemory();if(!success){HEAP32[DYNAMICTOP_PTR>>2]=ret;return 0}}return ret}function alignMemory(size,factor){if(!factor)factor=STACK_ALIGN;var ret=size=Math.ceil(size/factor)*factor;return ret}function getNativeTypeSize(type){switch(type){case"i1":case"i8":return 1;case"i16":return 2;case"i32":return 4;case"i64":return 8;case"float":return 4;case"double":return 8;default:{if(type[type.length-1]==="*"){return 4}else if(type[0]==="i"){var bits=parseInt(type.substr(1));assert(bits%8===0);return bits/8}else{return 0}}}}var asm2wasmImports={"f64-remLine truncated
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return TesseractCoreWASM;
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}
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);
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})();
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if (typeof exports === 'object' && typeof module === 'object')
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module.exports = TesseractCoreWASM;
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else if (typeof define === 'function' && define['amd'])
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define([], function() { return TesseractCoreWASM; });
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else if (typeof exports === 'object')
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exports["TesseractCoreWASM"] = TesseractCoreWASM;
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-17
@@ -1,17 +0,0 @@
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!function(t){var e={};function r(n){if(e[n])return e[n].exports;var i=e[n]={i:n,l:!1,exports:{}};return t[n].call(i.exports,i,i.exports,r),i.l=!0,i.exports}r.m=t,r.c=e,r.d=function(t,e,n){r.o(t,e)||Object.defineProperty(t,e,{enumerable:!0,get:n})},r.r=function(t){"undefined"!=typeof Symbol&&Symbol.toStringTag&&Object.defineProperty(t,Symbol.toStringTag,{value:"Module"}),Object.defineProperty(t,"__esModule",{value:!0})},r.t=function(t,e){if(1&e&&(t=r(t)),8&e)return t;if(4&e&&"object"==typeof t&&t&&t.__esModule)return t;var n=Object.create(null);if(r.r(n),Object.defineProperty(n,"default",{enumerable:!0,value:t}),2&e&&"string"!=typeof t)for(var i in t)r.d(n,i,function(e){return t[e]}.bind(null,i));return n},r.n=function(t){var e=t&&t.__esModule?function(){return t.default}:function(){return t};return r.d(e,"a",e),e},r.o=function(t,e){return Object.prototype.hasOwnProperty.call(t,e)},r.p="",r(r.s=12)}([function(t,e,r){"use strict";function n(t){return(n="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(t){return typeof t}:function(t){return t&&"function"==typeof Symbol&&t.constructor===Symbol&&t!==Symbol.prototype?"symbol":typeof t})(t)}var i=r(5),o=r(25),s=Object.prototype.toString;function a(t){return"[object Array]"===s.call(t)}function f(t){return null!==t&&"object"===n(t)}function u(t){return"[object Function]"===s.call(t)}function h(t,e){if(null!=t)if("object"!==n(t)&&(t=[t]),a(t))for(var r=0,i=t.length;r<i;r++)e.call(null,t[r],r,t);else for(var o in t)Object.prototype.hasOwnProperty.call(t,o)&&e.call(null,t[o],o,t)}t.exports={isArray:a,isArrayBuffer:function(t){return"[object ArrayBuffer]"===s.call(t)},isBuffer:o,isFormData:function(t){return"undefined"!=typeof FormData&&t instanceof FormData},isArrayBufferView:function(t){return"undefined"!=typeof ArrayBuffer&&ArrayBuffer.isView?ArrayBuffer.isView(t):t&&t.buffer&&t.buffer instanceof ArrayBuffer},isString:function(t){return"string"==typeof t},isNumber:function(t){return"number"==typeof t},isObject:f,isUndefined:function(t){return void 0===t},isDate:function(t){return"[object Date]"===s.call(t)},isFile:function(t){return"[object File]"===s.call(t)},isBlob:function(t){return"[object Blob]"===s.call(t)},isFunction:u,isStream:function(t){return f(t)&&u(t.pipe)},isURLSearchParams:function(t){return"undefined"!=typeof URLSearchParams&&t instanceof URLSearchParams},isStandardBrowserEnv:function(){return("undefined"==typeof navigator||"ReactNative"!==navigator.product)&&"undefined"!=typeof window&&"undefined"!=typeof document},forEach:h,merge:function t(){var e={};function r(r,i){"object"===n(e[i])&&"object"===n(r)?e[i]=t(e[i],r):e[i]=r}for(var i=0,o=arguments.length;i<o;i++)h(arguments[i],r);return e},extend:function(t,e,r){return h(e,function(e,n){t[n]=r&&"function"==typeof e?i(e,r):e}),t},trim:function(t){return t.replace(/^\s*/,"").replace(/\s*$/,"")}}},function(t,e,r){"use strict";(function(t){
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/*!
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* The buffer module from node.js, for the browser.
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*
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* @author Feross Aboukhadijeh <feross@feross.org> <http://feross.org>
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* @license MIT
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*/
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var n=r(20),i=r(21),o=r(22);function s(){return f.TYPED_ARRAY_SUPPORT?2147483647:1073741823}function a(t,e){if(s()<e)throw new RangeError("Invalid typed array length");return f.TYPED_ARRAY_SUPPORT?(t=new Uint8Array(e)).__proto__=f.prototype:(null===t&&(t=new f(e)),t.length=e),t}function f(t,e,r){if(!(f.TYPED_ARRAY_SUPPORT||this instanceof f))return new f(t,e,r);if("number"==typeof t){if("string"==typeof e)throw new Error("If encoding is specified then the first argument must be a string");return c(this,t)}return u(this,t,e,r)}function u(t,e,r,n){if("number"==typeof e)throw new TypeError('"value" argument must not be a number');return"undefined"!=typeof ArrayBuffer&&e instanceof ArrayBuffer?function(t,e,r,n){if(e.byteLength,r<0||e.byteLength<r)throw new RangeError("'offset' is out of bounds");if(e.byteLength<r+(n||0))throw new RangeError("'length' is out of bounds");e=void 0===r&&void 0===n?new Uint8Array(e):void 0===n?new Uint8Array(e,r):new 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c=!0,l=0;l<f;l++)if(u(t,o+l)!==u(e,l)){c=!1;break}if(c)return o}return-1}function y(t,e,r,n){r=Number(r)||0;var i=t.length-r;n?(n=Number(n))>i&&(n=i):n=i;var o=e.length;if(o%2!=0)throw new TypeError("Invalid hex string");n>o/2&&(n=o/2);for(var s=0;s<n;++s){var a=parseInt(e.substr(2*s,2),16);if(isNaN(a))return s;t[r+s]=a}return s}function b(t,e,r,n){return F(z(e,t.length-r),t,r,n)}function v(t,e,r,n){return F(function(t){for(var e=[],r=0;r<t.length;++r)e.push(255&t.charCodeAt(r));return e}(e),t,r,n)}function w(t,e,r,n){return v(t,e,r,n)}function x(t,e,r,n){return F(Y(e),t,r,n)}function _(t,e,r,n){return F(function(t,e){for(var r,n,i,o=[],s=0;s<t.length&&!((e-=2)<0);++s)r=t.charCodeAt(s),n=r>>8,i=r%256,o.push(i),o.push(n);return o}(e,t.length-r),t,r,n)}function E(t,e,r){return 0===e&&r===t.length?n.fromByteArray(t):n.fromByteArray(t.slice(e,r))}function S(t,e,r){r=Math.min(t.length,r);for(var n=[],i=e;i<r;){var o,s,a,f,u=t[i],h=null,c=u>239?4:u>223?3:u>191?2:1;if(i+c<=r)switch(c){case 1:u<128&&(h=u);break;case 2:128==(192&(o=t[i+1]))&&(f=(31&u)<<6|63&o)>127&&(h=f);break;case 3:o=t[i+1],s=t[i+2],128==(1Line truncated
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/*!
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* Determine if an object is a Buffer
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*
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* @author Feross Aboukhadijeh <feross@feross.org> <http://feross.org>
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* @license MIT
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*/
|
||||
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|
||||
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|
||||
//# sourceMappingURL=worker.min.js.map
|
||||
@@ -56,6 +56,14 @@ module.exports = {
|
||||
context: "src/core/vendor/",
|
||||
from: "tesseract/**/*",
|
||||
to: "assets/"
|
||||
}, {
|
||||
context: "node_modules/tesseract.js/",
|
||||
from: "dist/worker.min.js",
|
||||
to: "assets/tesseract"
|
||||
}, {
|
||||
context: "node_modules/tesseract.js-core/",
|
||||
from: "tesseract-core.wasm.js",
|
||||
to: "assets/tesseract"
|
||||
}
|
||||
])
|
||||
],
|
||||
|
||||
Reference in new issue
Block a user