1 package net.pterodactylus.sone.web.pages
3 import com.google.common.base.Ticker
4 import com.google.common.cache.*
5 import freenet.support.*
6 import net.pterodactylus.sone.data.*
7 import net.pterodactylus.sone.main.*
8 import net.pterodactylus.sone.utils.*
9 import net.pterodactylus.sone.web.*
10 import net.pterodactylus.sone.web.page.*
11 import net.pterodactylus.sone.web.pages.SearchPage.Optionality.*
12 import net.pterodactylus.util.template.*
13 import net.pterodactylus.util.text.*
14 import java.util.concurrent.TimeUnit.*
18 * This page lets the user search for posts and replies that contain certain
21 @TemplatePath("/templates/search.html")
22 class SearchPage(webInterface: WebInterface, loaders: Loaders, templateRenderer: TemplateRenderer, ticker: Ticker = Ticker.systemTicker()) :
23 SoneTemplatePage("search.html", webInterface, loaders, templateRenderer, pageTitleKey = "Page.Search.Title") {
26 constructor(webInterface: WebInterface, loaders: Loaders, templateRenderer: TemplateRenderer) :
27 this(webInterface, loaders, templateRenderer, Ticker.systemTicker())
29 private val cache: Cache<Iterable<Phrase>, Pagination<Post>> = CacheBuilder.newBuilder().ticker(ticker).expireAfterAccess(5, MINUTES).build()
31 override fun handleRequest(soneRequest: SoneRequest, templateContext: TemplateContext) {
32 val startTime = System.currentTimeMillis()
34 soneRequest.parameters["query"].emptyToNull?.parse()
35 } catch (te: TextException) {
36 redirect("index.html")
38 ?: redirect("index.html")
41 0 -> redirect("index.html")
42 1 -> phrases.first().phrase.also { word ->
44 word.removePrefix("sone://").let(soneRequest.core::getSone) != null -> redirect("viewSone.html?sone=${word.removePrefix("sone://")}")
45 word.removePrefix("post://").let(soneRequest.core::getPost) != null -> redirect("viewPost.html?post=${word.removePrefix("post://")}")
46 word.removePrefix("reply://").let(soneRequest.core::getPostReply) != null -> redirect("viewPost.html?post=${word.removePrefix("reply://").let(soneRequest.core::getPostReply)?.postId}")
47 word.removePrefix("album://").let(soneRequest.core::getAlbum) != null -> redirect("imageBrowser.html?album=${word.removePrefix("album://")}")
48 word.removePrefix("image://").let { soneRequest.core.getImage(it, false) } != null -> redirect("imageBrowser.html?image=${word.removePrefix("image://")}")
53 val soneNameCache = { sone: Sone -> sone.names() }.memoize()
54 val sonePagination = soneRequest.core.sones
55 .scoreAndPaginate(phrases, soneRequest.core.preferences.postsPerPage) { it.allText(soneNameCache) }
56 .apply { page = soneRequest.parameters["sonePage"].emptyToNull?.toIntOrNull() ?: 0 }
57 val postPagination = cache.get(phrases) {
58 soneRequest.core.sones
59 .flatMap(Sone::getPosts)
60 .filter { Post.FUTURE_POSTS_FILTER.apply(it) }
61 .scoreAndPaginate(phrases, soneRequest.core.preferences.postsPerPage) { it.allText(soneNameCache, soneRequest.core::getReplies) }
62 }.apply { page = soneRequest.parameters["postPage"].emptyToNull?.toIntOrNull() ?: 0 }
64 Logger.normal(SearchPage::class.java, "Finished search for “${soneRequest.parameters["query"]}” in ${System.currentTimeMillis() - startTime}ms.")
65 templateContext["sonePagination"] = sonePagination
66 templateContext["soneHits"] = sonePagination.items
67 templateContext["postPagination"] = postPagination
68 templateContext["postHits"] = postPagination.items
71 private fun <T> Iterable<T>.scoreAndPaginate(phrases: Iterable<Phrase>, postsPerPage: Int, texter: (T) -> String) =
72 map { it to score(texter(it), phrases) }
73 .filter { it.second > 0 }
74 .sortedByDescending { it.second }
76 .paginate(postsPerPage)
78 private fun Sone.names() =
80 listOf(name, firstName, middleName, lastName)
85 private fun Sone.allText(soneNameCache: (Sone) -> String) =
86 (soneNameCache(this) + profile.fields.map { "${it.name} ${it.value}" }.joinToString(" ", " ")).toLowerCase()
88 private fun Post.allText(soneNameCache: (Sone) -> String, getReplies: (String) -> Collection<PostReply>) =
89 (text + recipient.orNull()?.let { " ${soneNameCache(it)}" } + getReplies(id)
90 .filter { PostReply.FUTURE_REPLY_FILTER.apply(it) }
91 .map { "${soneNameCache(it.sone)} ${it.text}" }.joinToString(" ", " ")).toLowerCase()
93 private fun Iterable<Phrase>.indicesFor(text: String, predicate: (Phrase) -> Boolean) =
94 filter(predicate).map(Phrase::phrase).map(String::toLowerCase).flatMap { text.findAll(it) }
96 private fun score(text: String, phrases: Iterable<Phrase>): Double {
97 val requiredPhrases = phrases.count { it.required }
98 val requiredHits = phrases.indicesFor(text, Phrase::required)
99 .map { Math.pow(1 - it / text.length.toDouble(), 2.0) }
101 val optionalHits = phrases.indicesFor(text, Phrase::optional)
102 .map { Math.pow(1 - it / text.length.toDouble(), 2.0) }
104 val forbiddenHits = phrases.indicesFor(text, Phrase::forbidden)
106 return requiredHits * 3 + optionalHits + (requiredHits - requiredPhrases) * 5 - (forbiddenHits * 2)
109 private fun String.findAll(needle: String) =
110 generateSequence(indexOf(needle).takeIf { it > -1 }) { lastPosition ->
112 .let { indexOf(needle, it + 1) }
116 private fun String.parse() =
117 StringEscaper.parseLine(this)
120 it == "+" || it == "-" -> Phrase(it, OPTIONAL)
121 it.startsWith("+") -> Phrase(it.drop(1), REQUIRED)
122 it.startsWith("-") -> Phrase(it.drop(1), FORBIDDEN)
123 else -> Phrase(it, OPTIONAL)
127 private fun redirect(target: String): Nothing = throw RedirectException(target)
129 enum class Optionality {
135 private data class Phrase(val phrase: String, val optionality: Optionality) {
136 val required = optionality == REQUIRED
137 val forbidden = optionality == FORBIDDEN
138 val optional = optionality == OPTIONAL