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package com.pitchedapps.frost.injectors
import android.webkit.WebView
class JsBuilder {
private val css = StringBuilder()
private val js = StringBuilder()
fun css(css: String): JsBuilder {
this.css.append(css)
return this
}
fun js(content: String): JsBuilder {
this.js.append(content)
return this
}
fun build() = JsInjector(toString())
override fun toString(): String {
val builder = StringBuilder().append("!function(){")
if (css.isNotBlank()) {
val cssMin = css.replace(Regex("\\s+"), "")
builder.append("var a=document.createElement('style');a.innerHTML='$cssMin';document.head.appendChild(a);")
}
if (js.isNotBlank())
builder.append(js)
return builder.append("}()").toString()
}
}
class JsInjector(val function: String) {
fun inject(webView: WebView, callback: ((String) -> Unit)? = null) {
webView.evaluateJavascript(function, { value -> callback?.invoke(value) })
}
}
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