feat: enhance project configuration with modern setup

[cheton]

PR Type

enhancement, tests

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Description

• Enhanced project configuration with modern setup using ESLint, Babel, and Rollup.
• Refactored Interpreter.js for improved readability and consistency.
• Added comprehensive test cases for Interpreter covering various G-code scenarios.
• Updated package.json to version 3.0.0 with new dependencies and scripts.
• Added G-code fixtures for testing different scenarios.

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Changes walkthrough 📝

	Relevant files
Configuration changes	5 files .eslintrc.js Add ESLint configuration for code linting                                .eslintrc.js Added ESLint configuration file. Configured parser and environment settings. +14/-0    babel.config.js Add Babel configuration for code transpilation                      babel.config.js Added Babel configuration file. Extended from @trendmicro/babel-config. +6/-0      .eslintignore Add .eslintignore to exclude directories from linting        .eslintignore Added .eslintignore file to ignore specific directories. +3/-0      .npmignore Update .npmignore to exclude more files                                    .npmignore Updated .npmignore to include additional files. +2/-1      rollup.config.mjs Add Rollup configuration for bundling                                        rollup.config.mjs Added Rollup configuration for module bundling. +45/-0
Enhancement	2 files Interpreter.js Refactor Interpreter.js for improved readability                  src/Interpreter.js Refactored code for consistency and readability. Removed ESLint directive comment. +138/-139 index.js Update module export to ES6 syntax                                              src/index.js Changed module export to ES6 default export. +1/-1
Tests	5 files index.test.js Add test cases for Interpreter functionality                          src/tests/index.test.js Added comprehensive test cases for Interpreter. Tested various G-code scenarios. +354/-0  circle.nc Add G-code fixture for circle tests                                            src/tests/fixtures/circle.nc Added G-code fixture for circle. +8/-1      default-handler.nc Add G-code fixture for default handler tests                          src/tests/fixtures/default-handler.nc Added G-code fixture for default handler tests. +4/-1      helical-thread-milling.nc Add G-code fixture for helical thread milling tests            src/tests/fixtures/helical-thread-milling.nc Added G-code fixture for helical thread milling. +13/-1    one-inch-circle.nc Add G-code fixture for one-inch circle tests                          src/tests/fixtures/one-inch-circle.nc Added G-code fixture for one-inch circle. +12/-1
Documentation	2 files LICENSE Update LICENSE copyright year                                                        LICENSE Updated copyright year to present. +1/-1      README.md Update README to remove Travis CI badge                                    README.md Removed Travis CI build status badge. +1/-1
Dependencies	1 files package.json Update package.json for version 3.0.0 and dependencies      package.json Updated package version to 3.0.0. Updated dependencies and scripts. +43/-35

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PR Reviewer Guide 🔍

Here are some key observations to aid the review process:

⏱️ Estimated effort to review: 3 🔵🔵🔵⚪⚪

🧪 PR contains tests

🔒 No security concerns identified

⚡ Recommended focus areas for review Code Smell The interpret function is quite long and complex, handling multiple different G-code commands. Consider breaking it down into smaller, more focused functions for better maintainability. Possible Bug The motionMode is initialized to 'G0' but can be set to empty string when code is 80. This might cause issues if subsequent commands rely on a valid motion mode. Performance Issue The fromPairs function creates a new object for each call. For large G-code files with many commands, this could lead to memory pressure and garbage collection overhead.

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PR Code Suggestions ✨

Explore these optional code suggestions:

Category	Suggestion	Score
Possible bug	Add defensive programming checks to prevent potential array access errors Add error handling for invalid or undefined word array access to prevent potential runtime errors. Check if word exists and has required length before accessing indices. src/Interpreter.js [57-59] const word = words[0] || []; +if (!word.length) { + return; +} const letter = word[0]; const code = word[1]; Apply this suggestion Suggestion importance[1-10]: 8 Why: The suggestion addresses a potential runtime error by adding null/empty array checks before accessing array indices. This is important for code robustness and preventing crashes.	8
Best practice	Use a more appropriate initial state for motion mode tracking Initialize the motionMode class property with a more explicit default value to indicate it's unset, rather than using 'G0'. src/Interpreter.js [122-123] class Interpreter { - motionMode = 'G0'; + motionMode = ''; // Will be set to G0/G1/G2/G3 when encountered handlers = {}; Apply this suggestion Suggestion importance[1-10]: 4 Why: The suggestion improves code clarity by making the initial state more explicit, though the current default of 'G0' is actually valid as it's a common initial motion mode in G-code.	4
Performance	Cache array length value to optimize loop performance Cache the words.length value in a variable since it's used multiple times in the loop, improving performance by avoiding repeated property lookups. src/Interpreter.js [33-35] -for (let i = 0; i < words.length; ++i) { +const wordsLength = words.length; +for (let i = 0; i < wordsLength; ++i) { const word = words[i]; const letter = word[0]; Apply this suggestion Suggestion importance[1-10]: 3 Why: While the suggestion offers a minor performance optimization by caching the array length, the impact would be negligible in most cases as modern JavaScript engines already optimize such operations.	3

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