From e4270954ac29eea1fe1d6ef5aec23bb47df0d28d Mon Sep 17 00:00:00 2001
From: 66945 <54561572+66945@users.noreply.github.com>
Date: Mon, 7 Mar 2022 14:36:18 -0800
Subject: [PATCH] Added table reading, Helper Expressions, etc.

Can now read functions instead of purely numeric values.
---
 .../java/frc4388/utility/DesmosClient.html    | 78 +++++++++++++++++--
 1 file changed, 70 insertions(+), 8 deletions(-)

diff --git a/src/main/java/frc4388/utility/DesmosClient.html b/src/main/java/frc4388/utility/DesmosClient.html
index b842852..e61a8ac 100644
--- a/src/main/java/frc4388/utility/DesmosClient.html
+++ b/src/main/java/frc4388/utility/DesmosClient.html
@@ -8,16 +8,16 @@
         <div id="calculator" style="width: 100wh; height: 100vh; position: absolute; top: 0; left: 0; right: 0; bottom: 0; overflow: hidden;"></div>
         <script>
             const EXPRESSION_TYPES = {
-                'expression': ['integer', 'double', 'point', 'array'],
+                'expression': ['number', 'point', 'array'],
                 'note': ['note'],
                 'table': ['table']
             };
 
             let elt = document.getElementById('calculator');
             let calculator = Desmos.GraphingCalculator(elt);
-            // calculator.setExpression({ id: 'graph1', latex: 'y=x^2' });
 
-            let variables = [{'name': 'bob', 'type': 'integer', 'value': '27'}];
+            let helperExpressions = {};
+            let variables = [];
 
             let url = prompt("Robot URL", "localhost");
             let port = 8000;
@@ -28,7 +28,6 @@
                 http.addEventListener("error", handleError);
                 http.open("POST", `http://${url}:${port}`);
 
-                // debugger;
                 let json = serverStringify(getVariables());
                 http.send(json);
             }
@@ -73,15 +72,29 @@
                 let expressions = calculator.getExpressions();
 
                 for(expression of expressions) {
-                    if(expression['type'] === 'expression')
-                        vars = readVariable(expression['latex']);
+                    if(expression.type === 'expression')
+                        vars = readVariable(expression.latex);
+                    else if(expression.type === 'table')
+                        vars = readTable(expression);
                     else
-                        console.log('Invalid output type : ' + expression['type']);
+                        console.log('Invalid output type : ' + expression.type);
                 }
 
                 return vars;
             }
 
+            function findExpressionType(lvalue) {
+                let raw = lvalue.replace('\\left', '')
+                                .replace('\\right', '');
+                
+                if(raw.match(/\([a-zA-Z0-9._{}\(\)]*,[a-zA-Z0-9._{}\(\)]*\)/))
+                    return 'point';
+                else if(raw.match(/\[[a-zA-Z0-9.,_{}\(\)]*\]/))
+                    return 'array';
+                else
+                    return 'number';
+            }
+
             function readVariable(latex) {
                 let vars = [];
                 let lname = latex.split('=')[0];
@@ -91,12 +104,61 @@
                     let name = regularName(lname);
                     let value = regularValue(lvalue);
 
-                    vars.push({"name": name, "type": "expression", "value": value});
+                    let type = findExpressionType(lvalue);
+
+                    let numericValue, numericValueX, numericValueY, listValue;
+                    switch(type) {
+                        case 'number':
+                            numericValue = getNumericValue(name, lname);
+                            break;
+                        case 'point':
+                            numericValueX = getNumericValue(name + 'x', lname + '.x');
+                            numericValueY = getNumericValue(name + 'y', lname + '.y');
+                            break;
+                        case 'array':
+                            listValue = getListValue(name, lname);
+                            break;
+                    }
+
+                    if(numericValue)
+                        vars.push({"name": name, "type": "number", "value": numericValue});
+                    if(numericValueX && numericValueY)
+                        vars.push({"name": name, "type": "point", "value": numericValueX + ',' + numericValueY});
+                    if(listValue)
+                        vars.push({"name": name, "type": "array", "value": listValue.toString()});
                 }
 
                 return vars;
             }
 
+            function readTable(expression) {
+                let vars = [];
+
+                for(let column of expression.columns) {
+                    let name = regularName(column.latex);
+                    let listValue = getListValue(name, column.latex);
+
+                    if(listValue)
+                        vars.push({"name": name, "type": "array", "value": listValue.toString()});
+                }
+
+                return vars;
+            }
+
+            function getNumericValue(key, lname) {
+                if(!(key in helperExpressions))
+                    helperExpressions[key] = calculator.HelperExpression({ latex: lname });
+                else
+                    return helperExpressions[key].numericValue;
+            }
+
+            function getListValue(key, lname) {
+                if(!(key in helperExpressions))
+                    helperExpressions[key] = calculator.HelperExpression({ latex: lname });
+                else
+                    return helperExpressions[key].listValue;
+            }
+
             function latexName(name) {
                 return name.substring(0, 1) + '_{' + name.substring(1, name.length) + '}';
             }