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package com.pitchedapps.frost.injectors
import android.webkit.WebView
/**
* Created by Allan Wang on 2017-05-31.
*/
enum class JsActions(body: String) {
/**
* Redirects to login activity if create account is found
* see [com.pitchedapps.frost.web.FrostJSI.loadLogin]
*/
LOGIN_CHECK("document.getElementById('signup-button')&&Android.loadLogin();");
val function = "!function(){$body}();"
fun inject(webView: WebView, callback: ((String) -> Unit)? = null) = JsInjector(function).inject(webView, callback)
}
class JsBuilder {
private val css: StringBuilder by lazy { StringBuilder() }
fun css(css: String): JsBuilder {
this.css.append(css.trim())
return this
}
fun build() = JsInjector(toString())
override fun toString(): String {
val builder = StringBuilder().append("!function(){")
if (css.isNotBlank()) {
val cssMin = css.replace(Regex("\\s+"), "")
builder.append("var a=document.createElement('style');a.innerHTML='$cssMin';document.head.appendChild(a);")
}
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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