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import { flattenDeep } from 'lodash'
const parseShadow = string => {
const modes = ['_full', 'inset', 'x', 'y', 'blur', 'spread', 'color', 'alpha']
const regexPrep = [
// inset keyword (optional)
'^(?:(inset)\\s+)?',
// x
'(?:(-?[0-9]+(?:\\.[0-9]+)?)\\s+)',
// y
'(?:(-?[0-9]+(?:\\.[0-9]+)?)\\s+)',
// blur (optional)
'(?:(-?[0-9]+(?:\\.[0-9]+)?)\\s+)?',
// spread (optional)
'(?:(-?[0-9]+(?:\\.[0-9]+)?)\\s+)?',
// either hex, variable or function
'(#[0-9a-f]{6}|--[a-z\\-_]+|\\$[a-z\\-()_]+)',
// opacity (optional)
'(?:\\s+\\/\\s+([0-9]+(?:\\.[0-9]+)?)\\s*)?$'
].join('')
const regex = new RegExp(regexPrep, 'gis') // global, (stable) indices, single-string
const result = regex.exec(string)
if (result == null) {
return string
} else {
const numeric = new Set(['x', 'y', 'blur', 'spread', 'alpha'])
const { x, y, blur, spread, alpha, inset, color } = Object.fromEntries(modes.map((mode, i) => {
if (numeric.has(mode)) {
return [mode, Number(result[i])]
} else if (mode === 'inset') {
return [mode, !!result[i]]
} else {
return [mode, result[i]]
}
}).filter(([k, v]) => v !== false).slice(1))
return { x, y, blur, spread, color, alpha, inset }
}
}
// this works nearly the same as HTML tree converter
const parseIss = (input) => {
const buffer = [{ selector: null, content: [] }]
let textBuffer = ''
const getCurrentBuffer = () => {
let current = buffer[buffer.length - 1]
if (current == null) {
current = { selector: null, content: [] }
}
return current
}
// Processes current line buffer, adds it to output buffer and clears line buffer
const flushText = (kind) => {
if (textBuffer === '') return
if (kind === 'content') {
getCurrentBuffer().content.push(textBuffer.trim())
} else {
getCurrentBuffer().selector = textBuffer.trim()
}
textBuffer = ''
}
for (let i = 0; i < input.length; i++) {
const char = input[i]
if (char === ';') {
flushText('content')
} else if (char === '{') {
flushText('header')
} else if (char === '}') {
flushText('content')
buffer.push({ selector: null, content: [] })
textBuffer = ''
} else {
textBuffer += char
}
}
return buffer
}
export const deserialize = (input) => {
const ast = parseIss(input)
const finalResult = ast.filter(i => i.selector != null).map(item => {
const { selector, content } = item
let stateCount = 0
const selectors = selector.split(/,/g)
const result = selectors.map(selector => {
const output = { component: '' }
let currentDepth = null
selector.split(/ /g).reverse().forEach((fragment, index, arr) => {
const fragmentObject = { component: '' }
let mode = 'component'
for (let i = 0; i < fragment.length; i++) {
const char = fragment[i]
switch (char) {
case '.': {
mode = 'variant'
fragmentObject.variant = ''
break
}
case ':': {
mode = 'state'
fragmentObject.state = fragmentObject.state || []
stateCount++
break
}
default: {
if (mode === 'state') {
const currentState = fragmentObject.state[stateCount - 1]
if (currentState == null) {
fragmentObject.state.push('')
}
fragmentObject.state[stateCount - 1] += char
} else {
fragmentObject[mode] += char
}
}
}
}
if (currentDepth !== null) {
currentDepth.parent = { ...fragmentObject }
currentDepth = currentDepth.parent
} else {
Object.keys(fragmentObject).forEach(key => {
output[key] = fragmentObject[key]
})
if (index !== (arr.length - 1)) {
output.parent = { component: '' }
}
currentDepth = output
}
})
output.directives = Object.fromEntries(content.map(d => {
const [property, value] = d.split(':')
let realValue = value.trim()
if (property === 'shadow') {
realValue = value.split(',').map(v => parseShadow(v.trim()))
} if (!Number.isNaN(Number(value))) {
realValue = Number(value)
}
return [property, realValue]
}))
return output
})
return result
})
return flattenDeep(finalResult)
}
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