122 lines
2.8 KiB
JavaScript
122 lines
2.8 KiB
JavaScript
import { createLineData, useDocument } from '@terrace/core'
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import { createStringReader } from '@terrace/core/readers/js-string'
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export const SYMBOLS = {
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TAIL: Symbol('TAIL'),
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UNMATCHED: Symbol('UNMATCHED')
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}
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export const BASE_MACROS = {
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// string ({ line }) {
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// return tail(line).toString()
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// },
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// number ({ line }) {
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// const num = +tail(line)
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// if (isNaN(num) || line === '') return
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// return num
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// },
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// primitive (args) {
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// const num = macros.number(args)
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// return num !== undefined ? num : macros.string(args)
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// },
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// any (args) {
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// const macro = args.macros[args.head]
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// if (macro) return macro(args)
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// const numResult = args.macros.number(args)
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// if (numResult !== undefined) return numResult
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// args.tail = args.line
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// return args.macros.string(args)
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// },
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// scope ({ addScope, head, tail, line }, definition) {
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// return addScope({ definition, head, tail, line })
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// }
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}
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export function getTail(key, macro) {
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return args => {
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const scope = args.scope
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const result = macro(args)
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if (result === undefined) return
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if (!scope[key]) scope[key] = []
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scope[key].push(result)
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}
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}
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export function getText(key, macro) {
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return (args) => {
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const scope = args.scope
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const result = macro({...args, tail: args.line })
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if (result === undefined) return
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if (!scope[key]) scope[key] = []
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scope[key].push(result)
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}
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}
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export function getUnmatched(macro) {
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return (args) => {
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const key = args.head
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const scope = args.scope
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const result = macro(args)
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if (result === undefined) return
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if (!scope[key]) scope[key] = []
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scope[key].push(result)
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}
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}
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export function isMacro (macro) {
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return (args) => args.macros[macro](args)
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}
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export function isCollection (macro) {
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return (args) => ({ [args.head]: macro(args) })
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}
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export function isScope (definition) {
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return (args) => args.macros.scope(args, definition)
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}
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export async function parse(lines, schema) {
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const doc = useDocument(createStringReader(lines))
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const macros = schema.macros
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const scopes = [[]]
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function addScope() {
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const scope = []
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scopes[scopes.length] = scope
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return scope
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}
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let ended = false
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let lastLevel = 0
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while (!ended) {
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ended = await doc.next()
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if (ended) break;
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const level = doc.level()
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const scope = scopes[level] || []
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scopes.length = level + 1
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let entry = [doc.line()]
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Object.keys(schema.root).forEach(key => {
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if (entry[0] === key || entry[0].startsWith(`${key} `)) {
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entry = schema.root[key]({ entry, macros })
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}
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})
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if (!scopes[level]) {
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scopes[level] = scope
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scopes[level - 1].at(-1)[1] = scopes[level]
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}
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scope.push(entry)
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if (lastLevel == level) {
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console.log('DECREASE: ', doc.line(), scope)
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}
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lastLevel = level
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}
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return scopes[0]
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}
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