69 lines
1.8 KiB
JavaScript
69 lines
1.8 KiB
JavaScript
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class PropertyList {
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constructor(...properties) {
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for (const property of properties) {
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if (!(property instanceof Property))
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throw TypeError("properties has to be instances of Property");
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}
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this.properties = [];
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for (const property of properties) {
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this.add(property);
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}
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}
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add(property) {
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Object.defineProperty(this, property.key, {
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get() { return property.value },
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set(value) { property.parse(value) }
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});
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this.properties.push(property);
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}
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}
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export class Property {
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constructor(key, defaultValue = null, parser = (v) => v) {
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this.key = key;
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this.defaultValue = defaultValue;
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this.parser = parser;
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this.parse(this.defaultValue);
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}
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parse(v) {
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this.value = this.parser(v);
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return this.value;
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}
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clone() {
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return new Property(this.key, this.defaultValue, this.parser);
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}
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}
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/** Regex attempts (first to final)
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* ^\s*({0})\s*(=|:)\s*(.*)$
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* ^\s*({0})\s*(=|:)\s*([^#\n]*).*$
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* ^\s*({0})\s*(=|:)\s*(.*?)((#|\/\/).*)?$
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*/
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export class PropertyReader {
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constructor(...properties) {
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this.propertyList = new PropertyList(...properties);
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this.regex = new RegExp(`^\\s*(${this.propertyList.properties.map(p => p.key).join("|")})\\s*(=|:)\\s*(.*?)((#|\\/\\/).*)?$`, "mg");
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}
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read(str) {
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let match = null;
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while ((match = this.regex.exec(str)) !== null) {
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if (match.index === this.regex.lastIndex) // Infinite loop fix
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this.regex.lastIndex++;
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const key = match[1];
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const value = match[3].trim();
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this.propertyList[key] = value;
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}
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return this.propertyList;
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}
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}
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