plugins/base/src/main/kotlin/resolvers/external/DefaultExternalLocationProvider.kt


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package org.jetbrains.dokka.base.resolvers.external

import org.jetbrains.dokka.base.resolvers.local.DokkaLocationProvider.Companion.identifierToFilename
import org.jetbrains.dokka.base.resolvers.shared.ExternalDocumentation
import org.jetbrains.dokka.links.DRI
import org.jetbrains.dokka.plugability.DokkaContext

open class DefaultExternalLocationProvider(
    val externalDocumentation: ExternalDocumentation,
    val extension: String,
    val dokkaContext: DokkaContext
) : ExternalLocationProvider {
    val docURL = externalDocumentation.documentationURL.toString().removeSuffix("/") + "/"

    override fun resolve(dri: DRI): String? {
        externalDocumentation.packageList.locations[dri.toString()]?.let { path -> return "$docURL$path" }

        if (dri.packageName !in externalDocumentation.packageList.packages)
            return null

        return dri.constructPath()
    }

    protected open fun DRI.constructPath(): String {
        val classNamesChecked = classNames ?: return "$docURL${packageName ?: ""}/index$extension"
        val classLink = (listOfNotNull(packageName) + classNamesChecked.split('.'))
            .joinToString("/", transform = ::identifierToFilename)

        val fileName = callable?.let { identifierToFilename(it.name) } ?: "index"
        return "$docURL$classLink/$fileName$extension"
    }
}