Hack to fix language switch

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.4-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.6-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

settings.gradle.kts

@@ -1,7 +1,6 @@
 rootProject.name = "snark"
 
 enableFeaturePreview("TYPESAFE_PROJECT_ACCESSORS")
-//enableFeaturePreview("VERSION_CATALOGS")
 
 pluginManagement {
 

snark-core/src/commonMain/kotlin/space/kscience/snark/DataTreeWithDefault.kt

@@ -0,0 +1,17 @@
+package space.kscience.snark
+
+import space.kscience.dataforge.data.Data
+import space.kscience.dataforge.data.DataTree
+import space.kscience.dataforge.data.GenericDataTree
+import space.kscience.dataforge.names.NameToken
+import kotlin.reflect.KType
+
+public class DataTreeWithDefault<T>(public val tree: DataTree<T>, val default: DataTree<T>) :
+    DataTree<T> {
+    override val dataType: KType get() = tree.dataType
+
+    override val self: DataTreeWithDefault<T> get() = this
+
+    override val data: Data<T>? get() = tree.data ?: default.data
+    override val items: Map<NameToken, GenericDataTree<T, *>> get() = default.items + tree.items
+}

snark-core/src/jvmMain/kotlin/space/kscience/snark/extensions.kt

@@ -1,12 +0,0 @@
-package space.kscience.snark
-
-
-import space.kscience.dataforge.data.DataSource
-import space.kscience.dataforge.data.DataTree
-import space.kscience.dataforge.data.filterByType
-import space.kscience.dataforge.names.Name
-import space.kscience.dataforge.names.startsWith
-
-public inline fun <reified R : Any> DataTree<*>.branch(
-    branchName: Name,
-): DataSource<R> = filterByType<R> { name, _, _ -> name.startsWith(branchName) }

snark-html/src/jvmMain/kotlin/space/kscience/snark/html/Language.kt

@@ -5,9 +5,10 @@ import space.kscience.dataforge.actions.transform
 import space.kscience.dataforge.data.*
 import space.kscience.dataforge.meta.*
 import space.kscience.dataforge.names.*
+import space.kscience.snark.DataTreeWithDefault
 import space.kscience.snark.SnarkBuilder
-import space.kscience.snark.html.Language.Companion.SITE_LANGUAGES_KEY
 import space.kscience.snark.html.Language.Companion.SITE_LANGUAGE_KEY
+import space.kscience.snark.html.Language.Companion.SITE_LANGUAGE_MAP_KEY
 import kotlin.reflect.typeOf
 
 
@@ -16,26 +17,37 @@ public class Language : Scheme() {
     /**
      * Language key override
      */
-    public var key: String? by string()
+    public var key: String by string { error("Language key is not defined") }
 
     /**
-     * Page name prefix
+     * Data location
      */
-    public var prefix: String? by string()
+    public var dataPath: Name by value<Name>(
+        reader = { (it?.string ?: key).parseAsName(true) },
+        writer = { it.toString().asValue() }
+    )
 
     /**
-     * An override for data path. By default uses [prefix]
+     * Page name prefix override
      */
-    public var dataPath: String? by string()
+    public var route: Name by value<Name>(
+        reader = { (it?.string ?: key).parseAsName(true) },
+        writer = { it.toString().asValue() }
+    )
 
-    /**
-     * Target page name with a given language key
-     */
-    public var target: Name?
-        get() = meta["target"].string?.parseAsName(false)
-        set(value) {
-            meta["target"] = value?.toString()?.asValue()
-        }
+//    /**
+//     * An override for data path. By default uses [prefix]
+//     */
+//    public var dataPath: String? by string()
+//
+//    /**
+//     * Target page name with a given language key
+//     */
+//    public var target: Name?
+//        get() = meta["target"].string?.parseAsName(false)
+//        set(value) {
+//            meta["target"] = value?.toString()?.asValue()
+//        }
 
     public companion object : SchemeSpec<Language>(::Language) {
 
@@ -45,97 +57,122 @@ public class Language : Scheme() {
 
         public val SITE_LANGUAGE_KEY: Name = SiteContext.SITE_META_KEY + LANGUAGE_KEY
 
-        public val SITE_LANGUAGES_KEY: Name = SiteContext.SITE_META_KEY + LANGUAGE_MAP_KEY
+        public val SITE_LANGUAGE_MAP_KEY: Name = SiteContext.SITE_META_KEY + LANGUAGE_MAP_KEY
 
         public const val DEFAULT_LANGUAGE: String = "en"
-
-//        /**
-//         * Automatically build a language map for a data piece with given [name] based on existence of appropriate data nodes.
-//         */
-//        context(PageContextWithData)
-//        public fun languageMapFor(name: Name): Meta = Meta {
-//            val currentLanguagePrefix = languages[language]?.get(Language::prefix.name)?.string ?: language
-//            val fullName = (site.route.removeFirstOrNull(currentLanguagePrefix.asName()) ?: site.route) + name
-//            languages.forEach { (key, meta) ->
-//                val languagePrefix: String = meta[Language::prefix.name].string ?: key
-//                val nameWithLanguage: Name = if (languagePrefix.isBlank()) {
-//                    fullName
-//                } else {
-//                    languagePrefix.asName() + fullName
-//                }
-//                if (data.resolveHtmlOrNull(name) != null) {
-//                    key put meta.asMutableMeta().apply {
-//                        Language::target.name put nameWithLanguage.toString()
-//                    }
-//                }
-//            }
-//        }
     }
 }
 
-public fun Language(prefix: String): Language = Language { this.prefix = prefix }
+public fun Language(
+    key: String,
+    route: Name = key.parseAsName(true),
+    modifier: Language.() -> Unit = {},
+): Language = Language {
+    this.key = key
+    this.route = route
+    modifier()
+}
 
-public val SiteContext.languages: Map<String, Meta>
-    get() = siteMeta[SITE_LANGUAGES_KEY]?.items?.mapKeys { it.key.toStringUnescaped() } ?: emptyMap()
+internal val Data<*>.language: String?
+    get() = meta[Language.LANGUAGE_KEY].string?.lowercase()
+
+public val SiteContext.languageMap: Map<String, Language>
+    get() = siteMeta[SITE_LANGUAGE_MAP_KEY]?.items?.map {
+        it.key.toStringUnescaped() to Language.read(it.value)
+    }?.toMap() ?: emptyMap()
 
 public val SiteContext.language: String
     get() = siteMeta[SITE_LANGUAGE_KEY].string ?: Language.DEFAULT_LANGUAGE
-//
-//public val SiteContext.languagePrefix: Name
-//    get() = languages[language]?.let { it[Language::prefix.name].string ?: language }?.parseAsName() ?: Name.EMPTY
 
-
-private class LanguageBranchAction(val prefix: Name) : AbstractAction<Any, Any>(typeOf<Any>()) {
-    override fun DataSink<Any>.generate(data: DataTree<Any>, meta: Meta) {
-        data.forEach { (name, item) ->
-            val nameWithoutPrefix = name.removeFirstOrNull(prefix)
-            if (nameWithoutPrefix != null) {
-                // put language item as is
-                put(nameWithoutPrefix, item)
-            } else if (data[name + prefix] == null) {
-                // put if language item is missing
-                put(name, item)
-            }
-        }
-    }
-
-    override fun DataSink<Any>.update(source: DataTree<Any>, meta: Meta, namedData: NamedData<Any>) {
-        val name = namedData.name
-        val nameWithoutPrefix = name.removeFirstOrNull(prefix)
-        if (nameWithoutPrefix != null) {
-            // put language item as is
-            put(nameWithoutPrefix, namedData.data)
-        } else if (source[name + prefix] == null) {
-            // put if language item is missing
-            put(name, namedData.data)
-        }
+/**
+ * Walk the data tree depth-first
+ */
+private fun <T, TR : GenericDataTree<T, TR>> TR.walk(
+    namePrefix: Name = Name.EMPTY,
+): Sequence<Pair<Name, TR>> = sequence {
+    yield(namePrefix to this@walk)
+    items.forEach { (token, tree) ->
+        yieldAll(tree.walk(namePrefix + token))
     }
 }
 
-/**
- * Create a multiple sites for different languages. All sites use the same [content], but rely on different data
- *
- * @param data a common data root for all sites
- */
-@SnarkBuilder
-public fun SiteContext.multiLanguageSite(
-    data: DataTree<*>,
-    languageMap: Map<String, Language>,
-    content: HtmlSite,
-) {
-    languageMap.forEach { (languageKey, language) ->
-        val prefix = language.prefix ?: languageKey
-        val languageSiteMeta = Meta {
-            SITE_LANGUAGE_KEY put languageKey
-            SITE_LANGUAGES_KEY put Meta {
-                languageMap.forEach {
-                    it.key put it.value
+private class LanguageMapAction(val languages: Set<Language>) : AbstractAction<Any, Any>(typeOf<Any>()) {
+    override fun DataSink<Any>.generate(data: DataTree<Any>, meta: Meta) {
+        val languageMapCache = mutableMapOf<Name, MutableMap<Language, DataTree<Any>>>()
+
+        data.walk().forEach { (name, node) ->
+            val language = node.data?.language?.let { itemLanguage -> languages.find { it.key == itemLanguage } }
+            if (language == null) {
+                // put data without a language into all buckets
+                languageMapCache[name] = languages.associateWithTo(HashMap()) { node }
+            } else {
+                // collect data with language markers
+                val nameWithoutPrefix = if (name.startsWith(language.dataPath)) name.cutFirst() else name
+                languageMapCache.getOrPut(nameWithoutPrefix) { mutableMapOf() }[language] = node
+            }
+        }
+
+        languageMapCache.forEach { (nodeName, languageMap) ->
+            val languageMapMeta = Meta {
+                languageMap.keys.forEach { language ->
+                    set(language.key, (language.route + nodeName).toWebPath())
+                }
+            }
+            languageMap.forEach { (language, node) ->
+                val languagePrefix = language.dataPath
+                val nodeData = node.data
+                if (nodeData != null) {
+                    put(
+                        languagePrefix + nodeName,
+                        nodeData.withMeta { set(Language.LANGUAGE_MAP_KEY, languageMapMeta) }
+                    )
+                } else {
+                    wrap(languagePrefix + nodeName, Unit, Meta { set(Language.LANGUAGE_MAP_KEY, languageMapMeta) })
                 }
             }
         }
+
+    }
+
+    override fun DataSink<Any>.update(source: DataTree<Any>, meta: Meta, namedData: NamedData<Any>) {
+        TODO("Not yet implemented")
+    }
+}
+
+
+/**
+ * Create a multiple sites for different languages. All sites use the same [content], but rely on different data
+ */
+@SnarkBuilder
+public fun SiteContextWithData.multiLanguageSite(
+    defaultLanguage: Language,
+    vararg languages: Language,
+    content: HtmlSite,
+) {
+    val languageSet = setOf(defaultLanguage, *languages)
+
+    val languageMappedData = siteData.filterByType<Any>().transform(
+        LanguageMapAction(languageSet)
+    )
+
+    languageSet.forEach { language ->
+        val languageSiteMeta = Meta {
+            SITE_LANGUAGE_KEY put language.key
+            SITE_LANGUAGE_MAP_KEY put Meta {
+                languageSet.forEach {
+                    it.key put it
+                }
+            }
+        }
+
+        val overlayData = DataTreeWithDefault<Any>(
+            languageMappedData.branch(language.dataPath)!!,
+            languageMappedData.branch(defaultLanguage.dataPath)!!
+        )
+
         site(
-            prefix.parseAsName(),
-            data.filterByType<Any>().transform(LanguageBranchAction(Name.parse(language.dataPath ?: prefix))),
+            language.route,
+            overlayData,
             siteMeta = Laminate(languageSiteMeta, siteMeta),
             content
         )
@@ -151,35 +188,10 @@ public val PageContext.language: String
 /**
  * Mapping of language keys to other language versions of this page
  */
-public fun PageContext.getLanguageMap(): Map<String, Meta> =
-    pageMeta[Language.LANGUAGE_MAP_KEY]?.items?.mapKeys { it.key.toStringUnescaped() } ?: emptyMap()
+public val PageContext.languageMap: Map<String, Meta>
+    get() = pageMeta[Language.LANGUAGE_MAP_KEY]?.items?.mapKeys { it.key.toStringUnescaped() } ?: emptyMap()
 
-public fun PageContext.localisedPageRef(pageName: Name, relative: Boolean = false): String {
-    val prefix = getLanguageMap()[language]?.get(Language::prefix.name)?.string?.parseAsName() ?: Name.EMPTY
-    return resolvePageRef(prefix + pageName, relative)
-}
-
-//
-///**
-// * Render all pages in a node with given name. Use localization prefix if appropriate data is available.
-// */
-//public fun SiteContext.localizedPages(
-//    dataPath: Name,
-//    remotePath: Name = dataPath,
-//    dataRenderer: DataRenderer = DataRenderer.DEFAULT,
-//) {
-//    val item = resolveData.getItem(languagePrefix + dataPath)
-//        ?: resolveData.getItem(dataPath)
-//        ?: error("No data found by name $dataPath")
-//    route(remotePath) {
-//        pages(item, dataRenderer)
-//    }
-//}
-//
-//public fun SiteContext.localizedPages(
-//    dataPath: String,
-//    remotePath: Name = dataPath.parseAsName(),
-//    dataRenderer: DataRenderer = DataRenderer.DEFAULT,
-//) {
-//    localizedPages(dataPath.parseAsName(), remotePath, dataRenderer = dataRenderer)
-//}
+public fun PageContext.localisedPageRef(pageName: Name): String {
+    val prefix = languageMap[language]?.get(Language::dataPath.name)?.string?.parseAsName() ?: Name.EMPTY
+    return resolvePageRef(prefix + pageName)
+}

snark-html/src/jvmMain/kotlin/space/kscience/snark/html/MetaMaskData.kt

@@ -17,4 +17,4 @@ public fun <T> Data<T>.withMeta(newMeta: Meta): Data<T> = if (this is MetaMaskDa
     MetaMaskData(this, newMeta)
 }
 
-public inline fun <T> Data<T>.mapMeta(block: MutableMeta.() -> Unit): Data<T> = withMeta(meta.copy(block))
+public inline fun <T> Data<T>.withMeta(block: MutableMeta.() -> Unit): Data<T> = withMeta(meta.copy(block))

snark-html/src/jvmMain/kotlin/space/kscience/snark/html/PageContext.kt

@@ -1,13 +1,13 @@
 package space.kscience.snark.html
 
+import io.ktor.http.URLBuilder
+import io.ktor.http.Url
+import io.ktor.http.appendPathSegments
 import space.kscience.dataforge.data.DataTree
 import space.kscience.dataforge.meta.Meta
 import space.kscience.dataforge.meta.get
 import space.kscience.dataforge.meta.string
-import space.kscience.dataforge.names.Name
-import space.kscience.dataforge.names.asName
-import space.kscience.dataforge.names.hasIndex
-import space.kscience.dataforge.names.parseAsName
+import space.kscience.dataforge.names.*
 import space.kscience.snark.SnarkBuilder
 import space.kscience.snark.SnarkContext
 
@@ -27,32 +27,49 @@ public interface PageContext : SnarkContext {
 
     public val site: SiteContext
 
+    public val host: Url
+
     /**
      * A metadata for a page. It should include site metadata
      */
     public val pageMeta: Meta
 
     /**
-     * Resolve absolute url for given [ref]
+     * A route relative to parent site. Includes [SiteContext.siteRoute].
+     */
+    public val pageRoute: Name
+
+    /**
+     * Resolve absolute url for given relative [ref]
      *
      */
-    public fun resolveRef(ref: String): String
+    public fun resolveRef(ref: String, targetSite: SiteContext = site): String {
+        val pageUrl = URLBuilder(host)
+            .appendPathSegments(targetSite.path, true)
+            .appendPathSegments(ref)
+
+        return pageUrl.buildString().removeSuffix("/")
+    }
 
     /**
      * Resolve absolute url for a page with given [pageName].
      *
      * @param relative if true, add [SiteContext] route to the absolute page name
      */
-    public fun resolvePageRef(pageName: Name, relative: Boolean = false): String
+    public fun resolvePageRef(pageName: Name): String
+
+    public fun resolveRelativePageRef(pageName: Name): String = resolvePageRef(pageRoute + pageName)
+
 }
 
 context(PageContext)
 public val page: PageContext
     get() = this@PageContext
 
-public fun PageContext.resolvePageRef(pageName: String): String = resolvePageRef(pageName.parseAsName())
+public fun PageContext.resolvePageRef(pageName: String): String =
+    resolvePageRef(pageName.parseAsName())
 
-public val PageContext.homeRef: String get() = resolvePageRef(SiteContext.INDEX_PAGE_TOKEN.asName())
+public val PageContext.homeRef: String get() = resolvePageRef(Name.EMPTY)
 
 public val PageContext.name: Name? get() = pageMeta["name"].string?.parseAsName()
 

snark-html/src/jvmMain/kotlin/space/kscience/snark/html/PageFragment.kt

@@ -36,10 +36,6 @@ context(SnarkContext)
 public val Data<*>.id: String
     get() = meta["id"]?.string ?: "block[${hashCode()}]"
 
-context(SnarkContext)
-public val Data<*>.language: String?
-    get() = meta["language"].string?.lowercase()
-
 context(SnarkContext)
 public val Data<*>.order: Int?
     get() = meta["order"]?.int

snark-html/src/jvmMain/kotlin/space/kscience/snark/html/ParseAction.kt

@@ -12,7 +12,7 @@ import kotlin.reflect.typeOf
 public class ParseAction(private val snarkHtml: SnarkHtml) :
     AbstractAction<Binary, PageFragment>(typeOf<PageFragment>()) {
 
-    private fun parseOne(data: NamedData<Binary>, actionMeta: Meta): NamedData<PageFragment>? = with(snarkHtml) {
+    private fun parseOne(data: NamedData<Binary>): NamedData<PageFragment>? = with(snarkHtml) {
         val contentType = getContentType(data.name, data.meta)
 
         val parser = snark.readers.values.filterIsInstance<SnarkHtmlReader>().filter { parser ->
@@ -40,11 +40,11 @@ public class ParseAction(private val snarkHtml: SnarkHtml) :
 
     override fun DataSink<PageFragment>.generate(data: DataTree<Binary>, meta: Meta) {
         data.forEach {
-            parseOne(it, meta)?.let { put(it) }
+            parseOne(it)?.let { put(it) }
         }
     }
 
     override fun DataSink<PageFragment>.update(source: DataTree<Binary>, meta: Meta, namedData: NamedData<Binary>) {
-        parseOne(namedData,meta)?.let { put(it) }
+        parseOne(namedData)?.let { put(it) }
     }
 }

snark-html/src/jvmMain/kotlin/space/kscience/snark/html/Postprocessor.kt

@@ -77,9 +77,12 @@ public class Postprocessor<out R>(
 }
 
 context(PageContext)
-public inline fun FlowContent.postprocess(block: FlowContent.() -> Unit) {
+public inline fun FlowContent.postprocess(
+    processor: TextProcessor = WebPageTextProcessor(page),
+    block: FlowContent.() -> Unit,
+) {
     val fc = object : FlowContent by this {
-        override val consumer: TagConsumer<*> = Postprocessor(page, this@postprocess.consumer)
+        override val consumer: TagConsumer<*> = Postprocessor(page, this@postprocess.consumer, processor)
     }
     fc.block()
 }

snark-html/src/jvmMain/kotlin/space/kscience/snark/html/SiteContext.kt

@@ -15,11 +15,15 @@ import space.kscience.snark.SnarkContext
  */
 @SnarkBuilder
 public interface SiteContext : SnarkContext {
+    /**
+     * A context path segments for this site
+     */
+    public val path: List<String>
 
     /**
      * Route name of this [SiteContext] relative to the site root
      */
-    public val route: Name
+    public val siteRoute: Name
 
     /**
      * Site configuration
@@ -49,7 +53,7 @@ public interface SiteContext : SnarkContext {
     )
 
     /**
-     * Create a route block with its own data. Does not change base url
+     * Create a route block with its own data. Does not change the context path
      */
     @SnarkBuilder
     public fun route(
@@ -60,7 +64,7 @@ public interface SiteContext : SnarkContext {
     )
 
     /**
-     * Creates a sub-site and sets it as site base url
+     * Creates a sub-site and changes context path to match [name]
      * @param route mount site at [rootName]
      */
     @SnarkBuilder

snark-html/src/jvmMain/kotlin/space/kscience/snark/html/static/StaticSiteContext.kt

@@ -1,5 +1,6 @@
 package space.kscience.snark.html.static
 
+import io.ktor.http.Url
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.runBlocking
 import kotlinx.io.asSink
@@ -10,7 +11,6 @@ import space.kscience.dataforge.io.writeBinary
 import space.kscience.dataforge.meta.*
 import space.kscience.dataforge.names.Name
 import space.kscience.dataforge.names.isEmpty
-import space.kscience.dataforge.names.plus
 import space.kscience.dataforge.workspace.FileData
 import space.kscience.snark.html.*
 import java.nio.file.Path
@@ -23,8 +23,9 @@ import kotlin.reflect.typeOf
  */
 internal class StaticSiteContext(
     override val siteMeta: Meta,
-    private val baseUrl: String,
-    override val route: Name,
+    private val baseUrl: Url,
+    override val path: List<String>,
+    override val siteRoute: Name,
     private val outputPath: Path,
 ) : SiteContext {
 
@@ -82,21 +83,23 @@ internal class StaticSiteContext(
         }
     }
 
-    private fun resolveRef(baseUrl: String, ref: String) = if (baseUrl.isEmpty()) {
-        ref
-    } else if (ref.isEmpty()) {
-        baseUrl
-    } else {
-        "${baseUrl.removeSuffix("/")}/$ref"
-    }
+//    private fun resolveRef(baseUrl: String, ref: String) = if (baseUrl.isEmpty()) {
+//        ref
+//    } else if (ref.isEmpty()) {
+//        baseUrl
+//    } else {
+//        "${baseUrl.removeSuffix("/")}/$ref"
+//    }
 
-    class StaticPageContext(override val site: StaticSiteContext, override val pageMeta: Meta) : PageContext {
+    class StaticPageContext(
+        override val site: StaticSiteContext,
+        override val host: Url,
+        override val pageRoute: Name,
+        override val pageMeta: Meta,
+    ) : PageContext {
 
-        override fun resolveRef(ref: String): String =
-            site.resolveRef(site.baseUrl, ref)
-
-        override fun resolvePageRef(pageName: Name, relative: Boolean): String = resolveRef(
-            (if (relative) site.route + pageName else pageName).toWebPath() + ".html"
+        override fun resolvePageRef(pageName: Name): String = resolveRef(
+            pageName.toWebPath() + ".html"
         )
     }
 
@@ -115,7 +118,7 @@ internal class StaticSiteContext(
 
         newPath.parent.createDirectories()
 
-        val pageContext = StaticPageContext(this, Laminate(modifiedPageMeta, siteMeta))
+        val pageContext = StaticPageContext(this, baseUrl, route, Laminate(modifiedPageMeta, siteMeta))
         newPath.writeText(HtmlPage.createHtmlString(pageContext, data, content))
     }
 
@@ -124,7 +127,8 @@ internal class StaticSiteContext(
             StaticSiteContext(
                 siteMeta = Laminate(siteMeta, this@StaticSiteContext.siteMeta),
                 baseUrl = baseUrl,
-                route = route,
+                path = emptyList(),
+                siteRoute = route,
                 outputPath = outputPath.resolve(route.toWebPath())
             ),
             data ?: DataTree.EMPTY
@@ -140,8 +144,9 @@ internal class StaticSiteContext(
         val siteContextWithData = SiteContextWithData(
             StaticSiteContext(
                 siteMeta = Laminate(siteMeta, this@StaticSiteContext.siteMeta),
-                baseUrl = if (baseUrl == "") "" else resolveRef(baseUrl, route.toWebPath()),
-                route = Name.EMPTY,
+                baseUrl = baseUrl,
+                path = emptyList(),
+                siteRoute = route,
                 outputPath = outputPath.resolve(route.toWebPath())
             ),
             data ?: DataTree.EMPTY
@@ -164,12 +169,12 @@ internal class StaticSiteContext(
 public suspend fun SnarkHtml.staticSite(
     data: DataTree<*>?,
     outputPath: Path,
-    siteUrl: String = outputPath.absolutePathString().replace("\\", "/"),
+    siteUrl: Url = Url(outputPath.absolutePathString()),
     siteMeta: Meta = data?.meta ?: Meta.EMPTY,
     content: HtmlSite,
 ) {
     val siteContextWithData = SiteContextWithData(
-        StaticSiteContext(siteMeta, siteUrl, Name.EMPTY, outputPath),
+        StaticSiteContext(siteMeta, siteUrl, emptyList(), Name.EMPTY, outputPath),
         data ?: DataTree.EMPTY
     )
     with(content) {

snark-ktor/src/jvmMain/kotlin/space/kscience/snark/ktor/KtorSiteContext.kt

@@ -20,10 +20,7 @@ import space.kscience.dataforge.data.await
 import space.kscience.dataforge.data.meta
 import space.kscience.dataforge.io.Binary
 import space.kscience.dataforge.io.toByteArray
-import space.kscience.dataforge.meta.Laminate
-import space.kscience.dataforge.meta.Meta
-import space.kscience.dataforge.meta.string
-import space.kscience.dataforge.meta.toMutableMeta
+import space.kscience.dataforge.meta.*
 import space.kscience.dataforge.names.Name
 import space.kscience.dataforge.names.cutLast
 import space.kscience.dataforge.names.endsWith
@@ -37,11 +34,11 @@ import kotlin.reflect.typeOf
 //    style = CssBuilder().block().toString()
 //}
 
-public class KtorSiteContext(
+internal class KtorSiteContext(
     override val context: Context,
     override val siteMeta: Meta,
-    private val baseUrl: String,
-    override val route: Name,
+    override val path: List<String>,
+    override val siteRoute: Name,
     private val ktorRoute: Route,
 ) : SiteContext, ContextAware {
 
@@ -77,32 +74,21 @@ public class KtorSiteContext(
         }
     }
 
-    private fun resolveRef(baseUrl: String, ref: String) = if (baseUrl.isEmpty()) {
-        ref
-    } else if (ref.isEmpty()) {
-        baseUrl
-    } else {
-        "${baseUrl.removeSuffix("/")}/$ref"
-    }
-
 
     private class KtorPageContext(
         override val site: KtorSiteContext,
-        val pageBaseUrl: String,
+        override val host: Url,
+        override val pageRoute: Name,
         override val pageMeta: Meta,
     ) : PageContext {
 
-        override fun resolveRef(ref: String): String = site.resolveRef(pageBaseUrl, ref)
-
         override fun resolvePageRef(
             pageName: Name,
-            relative: Boolean,
         ): String {
-            val fullPageName = if (relative) site.route + pageName else pageName
-            return if (fullPageName.endsWith(SiteContext.INDEX_PAGE_TOKEN)) {
-                resolveRef(fullPageName.cutLast().toWebPath())
+            return if (pageName.endsWith(SiteContext.INDEX_PAGE_TOKEN)) {
+                resolveRef(pageName.cutLast().toWebPath())
             } else {
-                resolveRef(fullPageName.toWebPath())
+                resolveRef(pageName.toWebPath())
             }
         }
     }
@@ -111,18 +97,30 @@ public class KtorSiteContext(
         ktorRoute.get(route.toWebPath()) {
             val request = call.request
             //substitute host for url for backwards calls
-            val url = URLBuilder(baseUrl).apply {
+//            val url = URLBuilder(baseUrl).apply {
+//                protocol = URLProtocol.createOrDefault(request.origin.scheme)
+//                host = request.origin.serverHost
+//                port = request.origin.serverPort
+//            }
+
+            val hostUrl = URLBuilder().apply {
                 protocol = URLProtocol.createOrDefault(request.origin.scheme)
                 host = request.origin.serverHost
                 port = request.origin.serverPort
             }
 
-            val modifiedPageMeta = pageMeta.toMutableMeta().apply {
-                "name" put route.toString()
-                "url" put url.buildString()
+            val modifiedPageMeta = pageMeta.copy {
+                "host" put hostUrl.buildString()
+                "path" put path.map { it.asValue() }.asValue()
+                "route" put (siteRoute + route).toString()
             }
-            val pageContext =
-                KtorPageContext(this@KtorSiteContext, url.buildString(), Laminate(modifiedPageMeta, siteMeta))
+
+            val pageContext = KtorPageContext(
+                site = this@KtorSiteContext,
+                host = hostUrl.build(),
+                pageRoute = siteRoute + route,
+                pageMeta = Laminate(modifiedPageMeta, siteMeta)
+            )
             //render page in suspend environment
             val html = HtmlPage.createHtmlString(pageContext, data, content)
 
@@ -135,8 +133,8 @@ public class KtorSiteContext(
             KtorSiteContext(
                 context,
                 siteMeta = Laminate(siteMeta, this@KtorSiteContext.siteMeta),
-                baseUrl = baseUrl,
-                route = route,
+                path = path,
+                siteRoute = route,
                 ktorRoute = ktorRoute.createRouteFromPath(route.toWebPath())
             ),
             data ?: DataTree.EMPTY
@@ -153,11 +151,11 @@ public class KtorSiteContext(
             KtorSiteContext(
                 context,
                 siteMeta = Laminate(siteMeta, this@KtorSiteContext.siteMeta),
-                baseUrl = resolveRef(baseUrl, route.toWebPath()),
-                route = Name.EMPTY,
+                path = path + route.tokens.map { it.toStringUnescaped() },
+                siteRoute = Name.EMPTY,
                 ktorRoute = ktorRoute.createRouteFromPath(route.toWebPath())
             ),
-            data?: DataTree.EMPTY
+            data ?: DataTree.EMPTY
         )
         with(content) {
             with(siteContext) {
@@ -171,13 +169,13 @@ public class KtorSiteContext(
 public fun Route.site(
     context: Context,
     data: DataTree<*>?,
-    baseUrl: String = "",
+    path: List<String> = emptyList(),
     siteMeta: Meta = data?.meta ?: Meta.EMPTY,
     content: HtmlSite,
 ) {
     val siteContext = SiteContextWithData(
-        KtorSiteContext(context, siteMeta, baseUrl, route = Name.EMPTY, this@Route),
-        data?: DataTree.EMPTY
+        KtorSiteContext(context, siteMeta, path = path, siteRoute = Name.EMPTY, this@Route),
+        data ?: DataTree.EMPTY
     )
     with(content) {
         with(siteContext) {