// vue compiler module for transforming `<tag>:<attribute>` to `require`
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import { urlToRequire, ASTNode, Attr } from './utils'
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export interface AssetURLOptions {
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[name: string]: string | string[]
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}
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const defaultOptions: AssetURLOptions = {
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audio: 'src',
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video: ['src', 'poster'],
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source: 'src',
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img: 'src',
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image: ['xlink:href', 'href'],
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use: ['xlink:href', 'href']
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}
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export default (userOptions?: AssetURLOptions) => {
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const options = userOptions
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? Object.assign({}, defaultOptions, userOptions)
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: defaultOptions
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return {
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postTransformNode: (node: ASTNode) => {
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transform(node, options)
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}
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}
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}
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function transform(node: ASTNode, options: AssetURLOptions) {
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for (const tag in options) {
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if ((tag === '*' || node.tag === tag) && node.attrs) {
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const attributes = options[tag]
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if (typeof attributes === 'string') {
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node.attrs.some(attr => rewrite(attr, attributes))
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} else if (Array.isArray(attributes)) {
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attributes.forEach(item => node.attrs.some(attr => rewrite(attr, item)))
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}
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}
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}
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}
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function rewrite(attr: Attr, name: string) {
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if (attr.name === name) {
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const value = attr.value
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// only transform static URLs
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if (value.charAt(0) === '"' && value.charAt(value.length - 1) === '"') {
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attr.value = urlToRequire(value.slice(1, -1))
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return true
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}
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}
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return false
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}
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