97 lines
2.5 KiB
JavaScript
97 lines
2.5 KiB
JavaScript
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export default class Placekeeper {
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static KEYWORDS = ['if', 'for', 'while', 'else', 'elseif', 'end'];
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static init(content) {
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const sections = Array();
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const variables = new Map();
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const currentSection = new Map();
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for (let idx = 0; idx < content.length; idx++) {
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const char = content[idx];
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if (char == '{') {
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if (content[idx + 1] == '{') {
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if (currentSection.has('start')) currentSection.clear(); // everything before this was not a section then
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// begins a new section meant to be for a variable but still can be an operational section
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// @example: {{#if variableName}} {{#for variableName}} {{#while variableName}}
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currentSection.set('start', idx);
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}
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} else if (currentSection.has('start')) {
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if (char == '}') {
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if (content[idx + 1] == '}') {
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// ends a section
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currentSection.set('end', idx + 2);
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currentSection.set(
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'content',
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content
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.substring(
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currentSection.get('start'),
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currentSection.get('end')
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)
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.toString()
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.trim()
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);
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currentSection.set(
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'variables',
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Placekeeper.parseVariables(
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currentSection.get('content')
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)
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);
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sections.push(new Map(currentSection));
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currentSection.clear();
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for (const [key, value] of sectionVars) {
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variables.set(key, value);
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}
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idx++;
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}
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}
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}
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}
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console.log(sections);
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return {
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variables,
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sections,
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};
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}
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static parseVariables(content) {
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// iterates over the content character by character to extract variables and returns a list of them
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const variables = new Map();
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let currentVar;
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for (let idx = 0; idx < content.length; idx++) {
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const char = content[idx];
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if (char.matches(/[\w\d]/)) {
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if (!currentVar instanceof Map)
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currentVar = new Map([
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['name', ''],
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['start', idx],
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['end', -1],
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]);
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currentVar.set('name', currentVar.get('name') + char);
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}
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}
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}
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static parse(content, sections) {
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// replace all sections with an empty string
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if (!Array.isArray(sections)) {
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if (!sections instanceof Map) return content;
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sections = [...sections.values()];
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}
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let parts = [];
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let offset = 0;
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for (const section of sections) {
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if (!section instanceof Map) {
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if (!Array.isArray(section)) continue;
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if (section.length < 3) continue;
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}
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parts.push(content.substring(offset, section.get('start')));
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offset = section.get('end');
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}
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parts.push(content.substring(offset));
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return parts.join('');
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}
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}
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