66 lines
2.4 KiB
JavaScript
66 lines
2.4 KiB
JavaScript
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/**
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* Get internal prepared options from public options.
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*/
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export const getPreparedOptions = ({ comments = [], onError, statements = [], }) => {
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const commentsKeys = [];
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const firstTokens = [];
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const firstTokensAfterComments = [];
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let keyIndex = 1;
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const openTokens = [];
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const preparedComments = { __proto__: null };
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const preparedStatements = { __proto__: null };
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const statementsKeys = [];
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for (const { onError, onParse, tokens: [open, close], } of comments) {
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const closeRegExp = createRegExp(['', close]);
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const key = `parseStatementsPackageComment${keyIndex++}`;
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commentsKeys.push(key);
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openTokens.push([key, open]);
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preparedComments[key] = { closeRegExp, onError, onParse };
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}
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for (const { canIncludeComments, onError, onParse, tokens: [firstToken, ...restTokens], shouldSearchBeforeComments, } of statements) {
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const statementKey = `parseStatementsPackageStatement${keyIndex++}`;
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const tokens = [];
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(shouldSearchBeforeComments ? firstTokens : firstTokensAfterComments).push([
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statementKey,
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firstToken,
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]);
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statementsKeys.push(statementKey);
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for (const nextToken of restTokens) {
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const nextTokenKey = `parseStatementsPackageStatementPart${keyIndex++}`;
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const regexpTokens = [[nextTokenKey, nextToken]];
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if (canIncludeComments) {
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regexpTokens[shouldSearchBeforeComments ? 'push' : 'unshift'](...openTokens);
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}
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const nextTokenRegExp = createRegExp(...regexpTokens);
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tokens.push({ nextTokenKey, nextTokenRegExp });
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}
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preparedStatements[statementKey] = { onError, onParse, tokens };
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}
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const nextStatementRegExp = createRegExp(...firstTokens, ...openTokens, ...firstTokensAfterComments);
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return {
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commentsKeys,
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nextStatementRegExp,
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onError,
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preparedComments,
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preparedStatements,
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statementsKeys,
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};
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};
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/**
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* Creates regexp by tokens.
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*/
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const createRegExp = (...tokens) => {
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if (!tokens[0]) {
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return emptyRegExp;
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}
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let source = tokens[0][1];
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if (tokens[0][0] !== '') {
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source = tokens.map(([key, token]) => `(?<${key}>${token})`).join('|');
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}
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return new RegExp(source, 'gmu');
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};
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/**
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* Empty regexp that match only the empty string.
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*/
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const emptyRegExp = /^$/g;
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