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More information: https://www.jsdelivr.com/using-sri-with-dynamic-files\n */\n","import { compileWasm, getWasmVersion } from './compilers/wasm.js';\nimport { compileNative, getNativeVersion } from './compilers/native.js';\nimport { extractDateVersion } from './utils.js';\nimport stl from 'node-stl';\n\n/**\n * @typedef {'wasm' | 'native' | 'webworker'} EngineType\n */\n\n\n/**\n * Main compiler class that provides a unified interface.\n */\nexport class Compiler {\n /**\n * @param {object} options\n * @param {EngineType} options.engine - The compiler engine to use.\n * @param {string} [options.nativePath='openscad'] - Path to the native executable.\n * @param {string} [options.fileType='stl'] - Output file type (e.g., 'stl', 'amf').\n * @param {object} [options.args] - Optional: { fast: [...], full: [...] } extra args for each mode.\n */\n constructor({ engine = 'wasm', nativePath = 'openscad', fileType = 'stl', args = {\n fast: undefined,\n full: undefined\n } } = {}) {\n if (engine !== 'wasm' && engine !== 'native' && engine !== 'webworker') {\n throw new Error(\"Engine must be 'wasm' or 'native' or 'webworker'\");\n }\n this.engine = engine;\n this.nativePath = nativePath;\n this.fileType = fileType;\n this.args = args;\n\n if (!this.args.fast) {\n this.args.fast = this.getDefaultFastArgs();\n } else if (!this.args.full) {\n this.args.full = this.getDefaultArgs();\n }\n\n }\n\n /**\n * Compiles OpenSCAD code to a string (STL or other file type).\n * @param {string} scadCode - The OpenSCAD code to compile.\n * @param {string} [mode='fast'] - Compilation mode ('fast', 'full', etc.).\n * @returns {EventEmitter} Emits output events.\n */\n compile(scadCode, mode = 'fast') {\n const fileType = this.fileType || 'stl';\n const args = (this.args && this.args[mode]) ? this.args[mode] : [];\n if (this.engine === 'native') {\n return compileNative(scadCode, this.nativePath, fileType, args);\n } else if (this.engine === 'wasm') {\n return compileWasm(scadCode, fileType, args);\n } else if (this.engine === 'webworker') {\n throw new Error(\"WebWorker engine is not supporte yet\");\n } else {\n throw new Error(`Unknown engine type: ${this.engine}`);\n }\n }\n\n /**\n * Gets the date-style version of the underlying OpenSCAD engine.\n * @returns {Promise} Resolves with the date-style version string, or null if not found.\n */\n async getVersion() {\n let versionString;\n if (this.engine === 'native') {\n versionString = await getNativeVersion(this.nativePath);\n } else if (this.engine === 'wasm') {\n versionString = await getWasmVersion();\n } else if (this.engine === 'webworker') {\n throw new Error('WebWorker engine does not support version query yet');\n } else {\n throw new Error(`Unknown engine type: ${this.engine}`);\n }\n return extractDateVersion(versionString);\n }\n\n\n getDefaultFastArgs() {\n return [ \"--enable=lazy-union\", \"--backend=manifold\" ];\n }\n\n getDefaultArgs() {\n return [];\n }\n\n /**\n * Generates the OpenSCAD scene graph (CSG) as raw file output (no JSON conversion).\n * @param {string} scadCode - The OpenSCAD code to compile.\n * @returns {Promise} A promise that resolves with the raw CSG file Buffer.\n */\n getSceneGraph(scadCode) {\n return new Promise((resolve, reject) => {\n const originalFileType = this.fileType;\n this.fileType = 'csg';\n\n // Always use 'full' mode for an accurate scene graph\n const emitter = this.compile(scadCode, 'full');\n\n emitter.on('done', (csgOutput) => {\n this.fileType = originalFileType; // Restore fileType\n try {\n // Return raw Buffer for the CSG file. Convert string outputs to Buffer.\n const buf = Buffer.isBuffer(csgOutput) ? csgOutput : Buffer.from(String(csgOutput), 'utf8');\n resolve(buf);\n } catch (error) {\n reject(new Error(`Failed to return CSG output: ${error.message}`));\n }\n });\n\n emitter.on('error', (error) => {\n this.fileType = originalFileType; // Restore on error\n reject(error);\n });\n });\n }\n\n /**\n * Compiles the model to STL and returns its physical dimensions and properties.\n * @param {string} scadCode - The OpenSCAD code to compile.\n * @returns {Promise} A promise resolving with the dimension information.\n */\n getDimensions(scadCode) {\n return new Promise((resolve, reject) => {\n const originalFileType = this.fileType;\n this.fileType = 'stl';\n\n const emitter = this.compile(scadCode, 'full');\n\n emitter.on('done', (stlOutput) => {\n this.fileType = originalFileType; // Restore\n try {\n // Handle Buffer from native engine or string from other engines\n const stlBuffer = Buffer.isBuffer(stlOutput) ? stlOutput : Buffer.from(String(stlOutput), 'utf8');\n // node-stl exports a class; construct it with new\n const modelInfo = new stl(stlBuffer);\n\n const dimensions = {\n volume_cm3: modelInfo.volume,\n surfaceArea_cm2: modelInfo.area,\n boundingBox_mm: modelInfo.boundingBox,\n centerOfMass_mm: modelInfo.centerOfMass,\n };\n resolve(dimensions);\n } catch (error) {\n reject(new Error(`Failed to analyze STL data: ${error.message}`));\n }\n });\n\n emitter.on('error', (error) => {\n this.fileType = originalFileType; // Restore\n reject(error);\n });\n });\n }\n\n /**\n * Generates a PNG preview of the model using OpenSCAD's autocenter/viewall flags.\n * @param {string} scadCode - The OpenSCAD code.\n * @param {object} [options] - Preview options.\n * @param {string} [options.camera] - Optional camera string to override auto view.\n * @param {string} [options.imgsize='1024,768'] - Image dimensions.\n * @returns {Promise} Resolves with the PNG image buffer.\n */\n getPreview(scadCode, options = {}) {\n return new Promise((resolve, reject) => {\n const originalFileType = this.fileType;\n const originalArgs = JSON.parse(JSON.stringify(this.args));\n this.fileType = 'png';\n\n const previewArgs = [\n '--autocenter', // Center the model\n '--viewall', // Zoom to fit the model in the view\n `--imgsize=${options.imgsize || '1024,768'}`,\n ];\n\n // Allow optional camera override\n if (options.camera) {\n previewArgs.push(`--camera=${options.camera}`);\n }\n\n // Merge preview args into the 'full' arg set for the call, preserving originals\n this.args.full = (originalArgs.full || []).concat(previewArgs);\n\n const emitter = this.compile(scadCode, 'full');\n\n // collect stderr for debugging\n let stderrBuf = '';\n emitter.on('stderr', (data) => {\n try { stderrBuf += String(data); } catch (e) {}\n });\n\n emitter.on('done', (pngOutput) => {\n // Restore state\n this.fileType = originalFileType;\n this.args = originalArgs;\n try {\n if (Buffer.isBuffer(pngOutput)) {\n resolve(pngOutput);\n } else {\n resolve(Buffer.from(String(pngOutput), 'binary'));\n }\n } catch (err) {\n reject(new Error(`Failed to convert PNG output to Buffer: ${err.message}`));\n }\n });\n\n emitter.on('error', (error) => {\n // Restore state\n this.fileType = originalFileType;\n this.args = originalArgs;\n reject(new Error(`OpenSCAD error: ${error.message}. Stderr: ${stderrBuf}`));\n });\n });\n }\n}"]}