98 lines
2.3 KiB
JavaScript
98 lines
2.3 KiB
JavaScript
|
'use strict'
|
||
|
|
|
||
|
|
exports.parse = function (source, transform) {
|
||
|
|
return new ArrayParser(source, transform).parse()
|
||
|
|
}
|
||
|
|
|
||
|
|
class ArrayParser {
|
||
|
|
constructor (source, transform) {
|
||
|
|
this.source = source
|
||
|
|
this.transform = transform || identity
|
||
|
|
this.position = 0
|
||
|
|
this.entries = []
|
||
|
|
this.recorded = []
|
||
|
|
this.dimension = 0
|
||
|
|
}
|
||
|
|
|
||
|
|
isEof () {
|
||
|
|
return this.position >= this.source.length
|
||
|
|
}
|
||
|
|
|
||
|
|
nextCharacter () {
|
||
|
|
var character = this.source[this.position++]
|
||
|
|
if (character === '\\') {
|
||
|
|
return {
|
||
|
|
value: this.source[this.position++],
|
||
|
|
escaped: true
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return {
|
||
|
|
value: character,
|
||
|
|
escaped: false
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
record (character) {
|
||
|
|
this.recorded.push(character)
|
||
|
|
}
|
||
|
|
|
||
|
|
newEntry (includeEmpty) {
|
||
|
|
var entry
|
||
|
|
if (this.recorded.length > 0 || includeEmpty) {
|
||
|
|
entry = this.recorded.join('')
|
||
|
|
if (entry === 'NULL' && !includeEmpty) {
|
||
|
|
entry = null
|
||
|
|
}
|
||
|
|
if (entry !== null) entry = this.transform(entry)
|
||
|
|
this.entries.push(entry)
|
||
|
|
this.recorded = []
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
consumeDimensions () {
|
||
|
|
if (this.source[0] === '[') {
|
||
|
|
while (!this.isEof()) {
|
||
|
|
var char = this.nextCharacter()
|
||
|
|
if (char.value === '=') break
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
parse (nested) {
|
||
|
|
var character, parser, quote
|
||
|
|
this.consumeDimensions()
|
||
|
|
while (!this.isEof()) {
|
||
|
|
character = this.nextCharacter()
|
||
|
|
if (character.value === '{' && !quote) {
|
||
|
|
this.dimension++
|
||
|
|
if (this.dimension > 1) {
|
||
|
|
parser = new ArrayParser(this.source.substr(this.position - 1), this.transform)
|
||
|
|
this.entries.push(parser.parse(true))
|
||
|
|
this.position += parser.position - 2
|
||
|
|
}
|
||
|
|
} else if (character.value === '}' && !quote) {
|
||
|
|
this.dimension--
|
||
|
|
if (!this.dimension) {
|
||
|
|
this.newEntry()
|
||
|
|
if (nested) return this.entries
|
||
|
|
}
|
||
|
|
} else if (character.value === '"' && !character.escaped) {
|
||
|
|
if (quote) this.newEntry(true)
|
||
|
|
quote = !quote
|
||
|
|
} else if (character.value === ',' && !quote) {
|
||
|
|
this.newEntry()
|
||
|
|
} else {
|
||
|
|
this.record(character.value)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (this.dimension !== 0) {
|
||
|
|
throw new Error('array dimension not balanced')
|
||
|
|
}
|
||
|
|
return this.entries
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
function identity (value) {
|
||
|
|
return value
|
||
|
|
}
|