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30 lines
922 B
Plaintext
30 lines
922 B
Plaintext
"use strict";
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const PATTERN_REGEX = /%(-)?(\d+)?(?:\.(\d+))?([a-zA-Z%])(?:\{([^}]+)\})?/g;
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function compilePattern(pattern, createConverter, literalConverter) {
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const converters = [];
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let lastIndex = 0;
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let match;
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while ((match = PATTERN_REGEX.exec(pattern)) !== null) {
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const [full, align, minWidth, precision, specifier, format] = match;
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if (match.index > lastIndex) {
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converters.push(literalConverter(pattern.substring(lastIndex, match.index)));
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}
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const converter = createConverter(
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specifier,
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align === "-",
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parseInt(minWidth || "0", 10),
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parseInt(precision || "0", 10),
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format
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);
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if (converter) {
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converters.push(converter);
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}
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lastIndex = match.index + full.length;
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}
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if (lastIndex < pattern.length) {
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converters.push(literalConverter(pattern.substring(lastIndex)));
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}
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return converters;
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}
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module.exports = compilePattern;
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