31 lines
814 B
JavaScript
31 lines
814 B
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.detector = void 0;
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const types_1 = require("./types");
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const keys = Object.keys(types_1.typeHandlers);
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// This map helps avoid validating for every single image type
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const firstBytes = {
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0x38: 'psd',
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0x42: 'bmp',
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0x44: 'dds',
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0x47: 'gif',
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0x49: 'tiff',
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0x4d: 'tiff',
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0x52: 'webp',
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0x69: 'icns',
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0x89: 'png',
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0xff: 'jpg'
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};
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function detector(buffer) {
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const byte = buffer[0];
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if (byte in firstBytes) {
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const type = firstBytes[byte];
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if (type && types_1.typeHandlers[type].validate(buffer)) {
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return type;
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}
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}
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const finder = (key) => types_1.typeHandlers[key].validate(buffer);
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return keys.find(finder);
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}
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exports.detector = detector;
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