From 7460935f32748b10f6b3fedf9e77a373a9010d05 Mon Sep 17 00:00:00 2001
From: Allan Wang <me@allanwang.ca>
Date: Thu, 27 Sep 2018 18:03:53 -0400
Subject: Move parsers to facebook folder (#1109)

---
 .../frost/facebook/parsers/MessageParser.kt        | 126 +++++++++++++++++++++
 1 file changed, 126 insertions(+)
 create mode 100644 app/src/main/kotlin/com/pitchedapps/frost/facebook/parsers/MessageParser.kt

(limited to 'app/src/main/kotlin/com/pitchedapps/frost/facebook/parsers/MessageParser.kt')

diff --git a/app/src/main/kotlin/com/pitchedapps/frost/facebook/parsers/MessageParser.kt b/app/src/main/kotlin/com/pitchedapps/frost/facebook/parsers/MessageParser.kt
new file mode 100644
index 00000000..f32c3452
--- /dev/null
+++ b/app/src/main/kotlin/com/pitchedapps/frost/facebook/parsers/MessageParser.kt
@@ -0,0 +1,126 @@
+package com.pitchedapps.frost.facebook.parsers
+
+import com.pitchedapps.frost.dbflow.CookieModel
+import com.pitchedapps.frost.facebook.*
+import com.pitchedapps.frost.services.NotificationContent
+import com.pitchedapps.frost.utils.L
+import org.apache.commons.text.StringEscapeUtils
+import org.jsoup.Jsoup
+import org.jsoup.nodes.Document
+import org.jsoup.nodes.Element
+
+/**
+ * Created by Allan Wang on 2017-10-06.
+ *
+ * In Facebook, messages are passed through scripts and loaded into view via react afterwards
+ * We can parse out the content we want directly and load it ourselves
+ *
+ */
+object MessageParser : FrostParser<FrostMessages> by MessageParserImpl() {
+
+    fun queryUser(cookie: String?, name: String) = parseFromUrl(cookie, "${FbItem.MESSAGES.url}/?q=$name")
+
+}
+
+data class FrostMessages(val threads: List<FrostThread>,
+                         val seeMore: FrostLink?,
+                         val extraLinks: List<FrostLink>
+) : ParseNotification {
+    override fun toString() = StringBuilder().apply {
+        append("FrostMessages {\n")
+        append(threads.toJsonString("threads", 1))
+        append("\tsee more: $seeMore\n")
+        append(extraLinks.toJsonString("extra links", 1))
+        append("}")
+    }.toString()
+
+    override fun getUnreadNotifications(data: CookieModel) =
+            threads.filter(FrostThread::unread).map {
+                with(it) {
+                    NotificationContent(
+                            data = data,
+                            id = id,
+                            href = url,
+                            title = title,
+                            text = content ?: "",
+                            timestamp = time,
+                            profileUrl = img
+                    )
+                }
+            }
+}
+
+/**
+ * [id] user/thread id, or current time fallback
+ * [img] parsed url for profile img
+ * [time] time of message
+ * [url] link to thread
+ * [unread] true if image is unread, false otherwise
+ * [content] optional string for thread
+ */
+data class FrostThread(val id: Long,
+                       val img: String?,
+                       val title: String,
+                       val time: Long,
+                       val url: String,
+                       val unread: Boolean,
+                       val content: String?,
+                       val contentImgUrl: String?)
+
+private class MessageParserImpl : FrostParserBase<FrostMessages>(true) {
+
+    override var nameRes = FbItem.MESSAGES.titleId
+
+    override val url = FbItem.MESSAGES.url
+
+    override fun textToDoc(text: String): Document? {
+        var content = StringEscapeUtils.unescapeEcmaScript(text)
+        val begin = content.indexOf("id=\"threadlist_rows\"")
+        if (begin <= 0) {
+            L.d { "Threadlist not found" }
+            return null
+        }
+        content = content.substring(begin)
+        val end = content.indexOf("</script>")
+        if (end <= 0) {
+            L.d { "Script tail not found" }
+            return null
+        }
+        content = content.substring(0, end).substringBeforeLast("</div>")
+        return Jsoup.parseBodyFragment("<div $content")
+    }
+
+    override fun parseImpl(doc: Document): FrostMessages? {
+        val threadList = doc.getElementById("threadlist_rows") ?: return null
+        val threads: List<FrostThread> = threadList.getElementsByAttributeValueContaining("id", "thread_fbid_")
+                .mapNotNull(this::parseMessage)
+        val seeMore = parseLink(doc.getElementById("see_older_threads"))
+        val extraLinks = threadList.nextElementSibling().select("a")
+                .mapNotNull(this::parseLink)
+        return FrostMessages(threads, seeMore, extraLinks)
+    }
+
+    private fun parseMessage(element: Element): FrostThread? {
+        val a = element.getElementsByTag("a").first() ?: return null
+        val abbr = element.getElementsByTag("abbr")
+        val epoch = FB_EPOCH_MATCHER.find(abbr.attr("data-store"))[1]?.toLongOrNull() ?: -1L
+        //fetch id
+        val id = FB_MESSAGE_NOTIF_ID_MATCHER.find(element.id())[1]?.toLongOrNull()
+                ?: System.currentTimeMillis() % FALLBACK_TIME_MOD
+        val snippet = element.select("span.snippet").firstOrNull()
+        val content = snippet?.text()?.trim()
+        val contentImg = snippet?.select("i[style*=url]")?.getStyleUrl()
+        val img = element.getInnerImgStyle()
+        return FrostThread(
+                id = id,
+                img = img,
+                title = a.text(),
+                time = epoch,
+                url = a.attr("href").formattedFbUrl,
+                unread = !element.hasClass("acw"),
+                content = content,
+                contentImgUrl = contentImg
+        )
+    }
+
+}
-- 
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