added xkcd (#210)

* added xkcd

* xkcd alt text additions

src/en/xkcd/build.gradle

@@ -0,0 +1,19 @@
+apply plugin: 'com.android.application'
+apply plugin: 'kotlin-android'
+
+ext {
+    appName = 'Tachiyomi: xkcd'
+    pkgNameSuffix = "en.xkcd"
+    extClass = '.Xkcd'
+    extVersionCode = 1
+    extVersionSuffix = 0
+    libVersion = '1.2'
+}
+
+dependencies {
+    provided project(':duktape-stub')
+    provided "com.google.code.gson:gson:2.8.0"
+    provided "com.github.salomonbrys.kotson:kotson:2.5.0"
+}
+
+apply from: "$rootDir/common.gradle"

src/en/xkcd/src/eu/kanade/tachiyomi/extension/en/xkcd/Xkcd.kt

@@ -0,0 +1,136 @@
+package eu.kanade.tachiyomi.extension.en.xkcd
+
+import com.github.salomonbrys.kotson.string
+import com.google.gson.JsonParser
+import eu.kanade.tachiyomi.network.GET
+import eu.kanade.tachiyomi.source.model.*
+import eu.kanade.tachiyomi.source.online.ParsedHttpSource
+import okhttp3.Request
+import okhttp3.Response
+import org.jsoup.nodes.Document
+import org.jsoup.nodes.Element
+import rx.Observable
+import java.text.SimpleDateFormat
+
+class Xkcd : ParsedHttpSource() {
+
+    override val name = "xkcd"
+
+    override val baseUrl = "https://xkcd.com"
+
+    override val lang = "en"
+
+    override val supportsLatest = false
+
+
+    override fun fetchPopularManga(page: Int): Observable<MangasPage> {
+        val manga = SManga.create()
+        manga.setUrlWithoutDomain("/archive")
+        manga.title = "xkcd"
+        manga.artist = "Randall Munroe"
+        manga.author = "Randall Munroe"
+        manga.status = SManga.ONGOING
+        manga.description = "A webcomic of romance, sarcasm, math and language"
+        manga.thumbnail_url = thumbnailUrl
+
+        return Observable.just(MangasPage(arrayListOf(manga), false))
+    }
+
+    override fun fetchMangaDetails(manga: SManga): Observable<SManga> {
+        return Observable.just(manga)
+    }
+
+
+    override fun chapterListSelector() = "div#middleContainer.box a"
+
+    override fun chapterFromElement(element: Element): SChapter {
+
+        val chapter = SChapter.create()
+        chapter.url = element.attr("href")
+        val number = chapter.url.removeSurrounding("/")
+        chapter.chapter_number = number.toFloat()
+        chapter.name = number + " - " + element.text()
+        chapter.date_upload = element.attr("title").let {
+            SimpleDateFormat("yyyy-MM-dd").parse(it).time
+        }
+        return chapter
+    }
+
+    override fun pageListRequest(chapter: SChapter) = GET(baseUrl + chapter.url + "info.0.json")
+
+    override fun pageListParse(response: Response): List<Page> {
+        var jsonData = response.body()!!.string()
+        jsonData = jsonData.replace("\\u00e2\\u0080\\u0094", "\\u2014").replace("\\u00c3\\u00a9", "\\u00e9").replace("\\u00e2\\u0080\\u0093", "\\u2014").replace("\\u00c3\\u00b3", "\\u00F3")
+        val json = JsonParser().parse(jsonData).asJsonObject
+        val imageUrl = json["img"].string
+        val pages = mutableListOf<Page>()
+        pages.add(Page(0, "", imageUrl))
+        var titleWords = json["safe_title"].string.splitToSequence(" ")
+        var altTextWords = json["alt"].string.splitToSequence(" ")
+
+        var builder = StringBuilder()
+        var count = 0
+
+        for (i in titleWords) {
+            if (count != 0 && count.rem(6) == 0) {
+                builder.append("%0A")
+            }
+            builder.append(i).append("+")
+            count++
+        }
+        builder.append("%0A%0A")
+
+        var charCount = 0
+
+        for (i in altTextWords) {
+            if (charCount > 25) {
+                builder.append("%0A")
+                charCount = 0
+            }
+            builder.append(i).append("+")
+            charCount += i.length + 1
+        }
+
+        pages.add(Page(1, "", baseAltTextUrl + builder.toString() + baseAltTextPostUrl))
+        return pages
+    }
+
+    override fun pageListParse(document: Document): List<Page> = throw Exception("Not used")
+
+    override fun imageUrlRequest(page: Page) = GET(page.url)
+
+    override fun imageUrlParse(document: Document) = throw Exception("Not used")
+
+    override fun popularMangaSelector(): String = throw Exception("Not used")
+
+    override fun searchMangaFromElement(element: Element): SManga = throw Exception("Not used")
+
+    override fun searchMangaNextPageSelector(): String? = throw Exception("Not used")
+
+    override fun searchMangaSelector(): String = throw Exception("Not used")
+
+    override fun popularMangaRequest(page: Int): Request = throw Exception("Not used")
+
+    override fun searchMangaRequest(page: Int, query: String, filters: FilterList): Request = throw Exception("Not used")
+
+    override fun popularMangaNextPageSelector(): String? = throw Exception("Not used")
+
+    override fun popularMangaFromElement(element: Element): SManga = throw Exception("Not used")
+
+    override fun mangaDetailsParse(document: Document): SManga = throw Exception("Not used")
+
+    override fun latestUpdatesNextPageSelector(): String? = throw Exception("Not used")
+
+    override fun latestUpdatesFromElement(element: Element): SManga = throw Exception("Not used")
+
+    override fun latestUpdatesRequest(page: Int): Request = throw Exception("Not used")
+
+    override fun latestUpdatesSelector(): String = throw Exception("Not used")
+
+    companion object {
+        const val thumbnailUrl = "https://fakeimg.pl/550x780/ffffff/6E7B91/?text=xkcd&font=museo"
+        const val baseAltTextUrl = "https://fakeimg.pl/1500x2126/ffffff/000000/?text="
+        const val baseAltTextPostUrl = "&font_size=64&font=museo"
+    }
+
+}