From bc934ddc34efda415c610407a436c4a021335381 Mon Sep 17 00:00:00 2001
From: miner <pterosauria@protonmail.com>
Date: Thu, 4 Jan 2024 18:18:20 -0500
Subject: [PATCH] 	modified:   .env 	modified:   CeresHelper.js 
 modified:   build.sh 	modified:   shortBuild.sh

---
 .env           |  2 +-
 CeresHelper.js | 50 ++++++++++++++++++++++++++++++++++++++------------
 build.sh       |  3 +--
 shortBuild.sh  |  3 +--
 4 files changed, 41 insertions(+), 17 deletions(-)

diff --git a/.env b/.env
index a031e1d..7040814 100644
--- a/.env
+++ b/.env
@@ -1 +1 @@
-VERSION=2.0.2
\ No newline at end of file
+CERESJS=https://cdn.jsdelivr.net/gh/Pterodactylus/Ceres.js@master/dist/ceres.js
\ No newline at end of file
diff --git a/CeresHelper.js b/CeresHelper.js
index 192609c..dbd063d 100644
--- a/CeresHelper.js
+++ b/CeresHelper.js
@@ -118,7 +118,7 @@ export class Ceres {
 		this.instance.delete();
 	}
 
-	parseFunctionFromJson(jsonFunction, variablesMapping) {
+	static parseFunctionFromJson(jsonFunction, variablesMapping) {
         let parsedFunction = jsonFunction;
 
         // Replace variables with their corresponding indexed representations
@@ -127,19 +127,49 @@ export class Ceres {
             parsedFunction = parsedFunction.replace(regex, `x[${index}]`);
         });
 
-        return new Function('x', `return ${parsedFunction}`);
+        return parsedFunction;
     }
 
-	sanitizeInput(input) {
-        // Return input without any potentially harmful JavaScript string
-        return input.replace(/[<>]/g, "");
-    }
+  	static sanitizeInput(mathExpression) {
+		const validExpression = /^[0-9\s+\-/*()\[\]^sincoxetalaqrtPi.E]*$/;
+		const validStructure = /^[\d\s+\-/*()\[\]^]*$/;
+
+		if (!validExpression.test(mathExpression) || !validStructure.test(mathExpression.replace(/sin|cos|tan|cot|sec|csc|log|ln|sqrt|exp|abs|x|E|Pi/g,''))){
+			throw new Error(`Invalid mathematical expression: ${mathExpression}`);
+		}
+		
+		mathExpression = mathExpression.replace('^', '**');
+
+		// Translation to Javascript functions
+		mathExpression = mathExpression
+		.replace(/sin/g, 'Math.sin')
+		.replace(/cos/g, 'Math.cos')
+		.replace(/tan/g, 'Math.tan')
+		.replace(/cot/g, 'Math.cot')
+		.replace(/sec/g, 'Math.sec')
+		.replace(/csc/g, 'Math.csc')
+		.replace(/log/g, 'Math.log10')
+		.replace(/ln/g, 'Math.log')
+		.replace(/sqrt/g, 'Math.sqrt')
+		.replace(/exp/g, 'Math.exp')
+		.replace(/abs/g, 'Math.abs')
+		.replace(/Pi/g, 'Math.PI')
+		.replace(/E/g, 'Math.E');
+		
+    	return mathExpression;
+	}
 
     setSystemFromJson(jsonSystem) {
+        
+        //console.log(jsonSystem.functions)
+        let variables = jsonSystem.variables
+        jsonSystem.functions = jsonSystem.functions.map(function(x) { return Ceres.parseFunctionFromJson(x, variables); });
+        
         // sanitize the input to prevent injection attacks
-        jsonSystem.functions = jsonSystem.functions.map(this.sanitizeInput);
+        jsonSystem.functions = jsonSystem.functions.map(Ceres.sanitizeInput);
+        //console.log(jsonSystem.functions)
     
-        jsonSystem.functions.forEach(jsonFunction => this.addFunction(this.parseFunctionFromJson(jsonFunction, jsonSystem.variables)));
+        jsonSystem.functions.forEach(jsonFunction => this.addFunction(new Function('x', `return ${jsonFunction}`)));
 
         Object.keys(jsonSystem.variables).forEach((varName, index) => {
             let variable = jsonSystem.variables[varName];
@@ -152,10 +182,6 @@ export class Ceres {
         });
     }
 
-    generateInitialGuess(variablesMapping) {
-        return Object.keys(variablesMapping).map(varName => variablesMapping[varName].guess);
-    }
-
 	async run(jsonSystem, max_numb_iterations = 2000, parameter_tolerance = 1e-10, function_tolerance = 1e-16, gradient_tolerance = 1e-16, max_solver_time_in_seconds = 100, initial_trust_region_radius = 1e4, max_trust_region_radius = 1e16, max_num_consecutive_invalid_steps = 5) {
 		this.setSystemFromJson(jsonSystem);
 		let initial_guess = this.generateInitialGuess(jsonSystem.variables);
diff --git a/build.sh b/build.sh
index 5fdbafe..7d1c48f 100644
--- a/build.sh
+++ b/build.sh
@@ -69,8 +69,7 @@ sed -i 's/include(CeresCodeGeneration)/# include(CeresCodeGeneration)/' $bdir/in
 #$bdir/emsdk/upstream/emscripten/emconfigure cmake $cwd/ -DCMAKE_INSTALL_PREFIX=$bdir/installpkg
 $bdir/emsdk/upstream/emscripten/emcmake cmake $cwd/ -DCMAKE_INSTALL_PREFIX=$bdir/installpkg
 $bdir/emsdk/upstream/emscripten/emmake make
-cp --verbose $bdir/Ceres.js/Ceres.js $cwd/dist/Ceres-v$VERSION.js
-cp --verbose $bdir/Ceres.js/Ceres.js $cwd/dist/Ceres-latest.mjs
+cp --verbose $bdir/Ceres.js/Ceres.js $cwd/dist/ceres.js
 
 #~/emsdk/upstream/emscripten/emrun --browser "explorer.exe" ~/ceres.js-master/index.html
 #~/emsdk/upstream/emscripten/emrun --browser "explorer.exe" ~/ceres.js-master/test.html
diff --git a/shortBuild.sh b/shortBuild.sh
index 10f7ee3..b2b2447 100644
--- a/shortBuild.sh
+++ b/shortBuild.sh
@@ -14,8 +14,7 @@ $bdir/emsdk/upstream/emscripten/emcmake cmake $cwd/ -DCMAKE_INSTALL_PREFIX=$bdir
 $bdir/emsdk/upstream/emscripten/emmake make
 cat $cwd/CeresHelper.js >> $bdir/Ceres.js/Ceres.js
 
-cp --verbose $bdir/Ceres.js/Ceres.js $cwd/dist/Ceres-v$VERSION.mjs
-cp --verbose $bdir/Ceres.js/Ceres.js $cwd/dist/Ceres-latest.mjs
+cp --verbose $bdir/Ceres.js/Ceres.js $cwd/dist/ceres.js
 #cp --verbose $bdir/Ceres.js/Ceres.wasm.map $cwd/Ceres.wasm.map
 
 cd $cwd/app