From 4d134ec92818ef0ac49088e13c1125a6013a22f7 Mon Sep 17 00:00:00 2001
From: willeand <eandwse@gmail.com>
Date: Tue, 4 Jun 2024 13:45:40 -0700
Subject: [PATCH] creates a switch statement code smell detection. 1.0

---
 output/data.json |  2 +-
 package.json     |  4 +++
 src/badSwitch.ts | 66 ++++++++++++++++++++++++++++++++++++++++++++++++
 src/extension.ts |  5 ++++
 4 files changed, 76 insertions(+), 1 deletion(-)
 create mode 100644 src/badSwitch.ts

diff --git a/output/data.json b/output/data.json
index 02a7603..1dc1244 100644
--- a/output/data.json
+++ b/output/data.json
@@ -1 +1 @@
-{"12":["Code Smell: Consider refactoring to reduce method length"],"30":["Code smell found: Long Parameters in method public static int addNumbers (int a, int b, int c, int d){"],"38":["Code Smell: Consider refactoring to reduce method length"]}
\ No newline at end of file
+{"69":["Similar logic found in switch cases based on character usage","Similar logic found in switch cases based on character usage","Similar logic found in switch cases based on character usage"],"92":["Similar logic found in switch cases based on character usage","Similar logic found in switch cases based on character usage"]}
\ No newline at end of file
diff --git a/package.json b/package.json
index a83a227..dc0f576 100644
--- a/package.json
+++ b/package.json
@@ -100,6 +100,10 @@
 			{
 				"command": "extension.createJSON",
 				"title": "createJSON"
+			},
+			{
+				"command": "extension.badSwitch",
+				"title": "badSwitch"
 			}
 		],
 		"menus": {
diff --git a/src/badSwitch.ts b/src/badSwitch.ts
new file mode 100644
index 0000000..38eac7a
--- /dev/null
+++ b/src/badSwitch.ts
@@ -0,0 +1,66 @@
+import * as vscode from 'vscode';
+
+export function badSwitch(myMap: Map<number, string[]>) {
+    let editor = vscode.window.activeTextEditor;
+    if (!editor) {
+        vscode.window.showErrorMessage('No active text editor.');
+        return myMap; // Early return if no editor
+    }
+
+    let text = editor.document.getText();
+    // Regex to match Java switch statements
+    let switchRegex = /switch\s*\(([^)]+)\)\s*{([^}]*)}/g;
+    let match;
+    while ((match = switchRegex.exec(text))) {
+        let switchCases = match[2].split('case').slice(1);
+        if (switchCases.length >= 3) {
+            let lineIndex = editor.document.positionAt(match.index).line;
+            let errorMessage = `Code smell found: Switch statement with ${switchCases.length} cases`;
+            if (!myMap.has(lineIndex)) {
+                myMap.set(lineIndex, [errorMessage]);
+            } else {
+                myMap.get(lineIndex)?.push(errorMessage);
+            }
+
+            // Initialize character array for each case
+            let charArrays: number[][] = [];
+            for (let i = 0; i < switchCases.length; i++) {
+                let caseCharArray = new Array(26).fill(0);
+                let caseLines = switchCases[i].split('\n').map(line => line.trim().toLowerCase());
+                for (let line of caseLines) {
+                    for (let char of line) {
+                        if (char >= 'a' && char <= 'z') {
+                            let index = char.charCodeAt(0) - 'a'.charCodeAt(0);
+                            caseCharArray[index]++;
+                        }
+                    }
+                }
+                charArrays.push(caseCharArray);
+            }
+
+            // Compare each case to every other case at least once
+            for (let i = 0; i < charArrays.length; i++) {
+                for (let j = i + 1; j < charArrays.length; j++) {
+                    let similarity = calculateSimilarity(charArrays[i], charArrays[j]);
+                    if (similarity >= 0.8) { // Adjust similarity threshold as needed
+                        let similarLogicMessage = `Similar logic found in switch cases based on character usage`;
+                        if (!myMap.get(lineIndex)?.includes(similarLogicMessage)) {
+                            myMap.get(lineIndex)?.push(similarLogicMessage);
+                        }
+                        break; // Exit inner loop if similar logic found
+                    }
+                }
+            }
+        }
+    }
+
+    return myMap;
+}
+
+function calculateSimilarity(arr1: number[], arr2: number[]): number {
+    let similarity = 0;
+    for (let i = 0; i < 26; i++) {
+        similarity += Math.min(arr1[i], arr2[i]);
+    }
+    return similarity / arr1.reduce((a, b) => a + b, 0); // Normalize by total characters in the first case
+}
\ No newline at end of file
diff --git a/src/extension.ts b/src/extension.ts
index 2777ef8..aace195 100644
--- a/src/extension.ts
+++ b/src/extension.ts
@@ -13,6 +13,7 @@ import { findLowercaseEnums } from './findLowercaseEnums';
 import { findConstantCap} from './findConstantCap';
 import { longMethod } from './longMethod';
 import { longParameters } from './longParameters';
+import { badSwitch } from './badSwitch';
 
 const myMap: Map<number, string[]> = new Map();
 const filePath = 'C:\\Users\\Will\\Desktop\\cw\\gradeFast-1.0\\output\\data.json';
@@ -58,6 +59,10 @@ export function activate(context: vscode.ExtensionContext) {
         longParameters(myMap);
     } );
 
+    const disposable9 = vscode.commands.registerCommand('extension.badSwitch', () => {
+        badSwitch(myMap);
+    } );
+
     const commentController = vscode.comments.createCommentController('comment-sample', 'Comment API Sample');
     context.subscriptions.push(commentController);