/* @flow */
const compile = require('lodash.template')
const compileOptions = {
escape: /{{([^{][\s\S]+?[^}])}}/g,
interpolate: /{{{([\s\S]+?)}}}/g
}
export type ParsedTemplate = {
head: (data: any) => string;
neck: (data: any) => string;
tail: (data: any) => string;
};
export function parseTemplate (
template: string,
contentPlaceholder?: string = '<!--vue-ssr-outlet-->'
): ParsedTemplate {
if (typeof template === 'object') {
return template
}
let i = template.indexOf('</head>')
const j = template.indexOf(contentPlaceholder)
if (j < 0) {
throw new Error(`Content placeholder not found in template.`)
}
if (i < 0) {
i = template.indexOf('<body>')
if (i < 0) {
i = j
}
}
return {
head: compile(template.slice(0, i), compileOptions),
neck: compile(template.slice(i, j), compileOptions),
tail: compile(template.slice(j + contentPlaceholder.length), compileOptions)
}
}