package com.pitchedapps.frost.web import android.annotation.SuppressLint import android.content.Context import android.view.View import android.webkit.JavascriptInterface import android.webkit.WebView import android.webkit.WebViewClient import ca.allanwang.kau.searchview.SearchItem import ca.allanwang.kau.utils.gone import com.pitchedapps.frost.facebook.FbTab import com.pitchedapps.frost.facebook.USER_AGENT_BASIC import com.pitchedapps.frost.injectors.JsAssets import com.pitchedapps.frost.injectors.JsBuilder import com.pitchedapps.frost.injectors.jsInject import com.pitchedapps.frost.utils.L import com.pitchedapps.frost.utils.Prefs import io.reactivex.schedulers.Schedulers import io.reactivex.subjects.PublishSubject import org.jetbrains.anko.runOnUiThread import org.jsoup.Jsoup import java.util.concurrent.TimeUnit @SuppressLint("ViewConstructor") /** * Created by Allan Wang on 2017-06-25. * * A bare bone search view meant solely to extract data from the web * This should be hidden * Having a single webview allows us to avoid loading the whole page with each query */ class FrostWebViewSearch(context: Context, val contract: SearchContract) : WebView(context) { val searchSubject = PublishSubject.create() init { gone() setupWebview() } /** * Basic info of last search results, so we can check if the list has actually changed * Contains the last item's href (search more) as well as the number of items found * This holder is synchronized */ var previousResult: Pair = Pair(null, 0) fun saveResultFrame(result: List, String>>) { synchronized(previousResult) { previousResult = Pair(result.lastOrNull()?.second, result.size) } } @SuppressLint("SetJavaScriptEnabled") fun setupWebview() { settings.javaScriptEnabled = true settings.userAgentString = USER_AGENT_BASIC setLayerType(View.LAYER_TYPE_HARDWARE, null) webViewClient = FrostWebViewClientSearch() addJavascriptInterface(SearchJSI(), "Frost") searchSubject.debounce(300, TimeUnit.MILLISECONDS).subscribeOn(Schedulers.newThread()) .map { Jsoup.parse(it).select("a:not([rel*='keywords(']):not([href=#])[rel]").map { element -> //split text into separate items L.v("Search element ${element.attr("href")}") val texts = element.select("div").map { (it.ownText()) }.filter { it.isNotBlank() } val pair = Pair(texts, element.attr("href")) L.v("Search element potential $pair") pair }.filter { it.first.isNotEmpty() } } .filter { content -> Pair(content.lastOrNull()?.second, content.size) != previousResult } .subscribe { content: List, String>> -> saveResultFrame(content) L.d("Search element count ${content.size}") contract.emitSearchResponse(content.map { (texts, href) -> SearchItem(href, texts[0], texts.getOrNull(1)) }) } reload() } /** * Toggles web activity * Should be done in conjunction with showing/hiding the search view */ var pauseLoad: Boolean get() = settings.blockNetworkLoads set(value) { context.runOnUiThread { settings.blockNetworkLoads = value } } override fun reload() { super.loadUrl(FbTab.SEARCH.url) } /** * Sets the input to have our given text, then dispatches the input event so the webpage recognizes it */ fun query(input: String) { pauseLoad = false L.d("Searching attempt", input) JsBuilder().js("var e=document.getElementById('main-search-input');if(e){e.value='$input';var n=new Event('input',{bubbles:!0,cancelable:!0});e.dispatchEvent(n),e.dispatchEvent(new Event('focus'))}else console.log('Input field not found');").build().inject(this) } /** * Created by Allan Wang on 2017-05-31. * * Barebones client that does what [FrostWebViewSearch] needs */ inner class FrostWebViewClientSearch : WebViewClient() { override fun onPageFinished(view: WebView, url: String) { super.onPageFinished(view, url) L.i("Search Page finished $url") view.jsInject(JsAssets.SEARCH) } } inner class SearchJSI { @JavascriptInterface fun handleHtml(html: String) { L.d("Search received response ${contract.isSearchOpened}") if (!contract.isSearchOpened) pauseLoad = true searchSubject.onNext(html) } @JavascriptInterface fun emit(flag: Int) { when (flag) { 0 -> { L.d("Search loaded successfully") } 1 -> { //something is not found in the search view; this is effectively useless L.eThrow("Search subject error; reverting to full overlay") Prefs.searchBar = false searchSubject.onComplete() contract.searchOverlayDispose() } } } } /** * Clear up some components */ fun dispose() { searchSubject.onComplete() } interface SearchContract { fun searchOverlayDispose() fun emitSearchResponse(items: List) val isSearchOpened: Boolean } }