mirror of https://github.com/Corewala/Buran
108 lines
2.8 KiB
Kotlin
108 lines
2.8 KiB
Kotlin
package corewala.buran
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const val SCHEME = "gemini://"
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const val TRAVERSE = "../"
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const val SOLIDUS = "/"
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const val DIREND = "/"
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/**
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*
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* Easy uri path handling for Gemini
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*
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*/
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class OppenURI constructor(private var ouri: String) {
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constructor(): this("")
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var host: String = ""
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init {
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extractHost()
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}
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fun set(ouri: String){
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this.ouri = ouri
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extractHost()
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}
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fun resolve(reference: String) {
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if(ouri == "$SCHEME$host") ouri = "$ouri/"
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return when {
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reference.startsWith(SCHEME) -> set(reference)
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reference.startsWith(SOLIDUS) -> ouri = "$SCHEME$host$reference"
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reference.startsWith(TRAVERSE) -> {
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if(!ouri.endsWith(DIREND)) ouri = ouri.removeFile()
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val traversalCount = reference.split(TRAVERSE).size - 1
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ouri = traverse(traversalCount) + reference.replace(TRAVERSE, "")
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}
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else -> {
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ouri = when {
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ouri.endsWith(DIREND) -> "${ouri}$reference"
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else -> "${ouri.substring(0, ouri.lastIndexOf("/"))}/$reference"
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}
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}
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}
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}
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fun traverse(): OppenURI{
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val path = ouri.removePrefix("$SCHEME$host")
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val segments = path.split(SOLIDUS).filter { it.isNotEmpty() }
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var nouri = "$SCHEME$host"
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when (ouri) {
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"" -> {
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}
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SCHEME -> ouri = ""
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"$nouri/" -> ouri = SCHEME
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else -> {
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when {
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segments.isNotEmpty() -> {
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val remaining = segments.dropLast(1)
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remaining.forEach { segment ->
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nouri += "/$segment"
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}
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ouri = "$nouri/"
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}
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else -> ouri = "$nouri/"
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}
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}
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}
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return this
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}
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private fun traverse(count: Int): String{
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val path = ouri.removePrefix("$SCHEME$host")
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val segments = path.split(SOLIDUS).filter { it.isNotEmpty() }
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val segmentCount = segments.size
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var nouri = "$SCHEME$host"
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segments.forEachIndexed{ index, segment ->
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if(index < segmentCount - count){
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nouri += "/$segment"
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}
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}
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return "$nouri/"
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}
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private fun extractHost(){
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if(ouri.isEmpty()) return
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val urn = ouri.removePrefix(SCHEME)
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host = when {
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urn.contains(SOLIDUS) -> urn.substring(0, urn.indexOf(SOLIDUS))
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else -> urn
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}
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}
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fun copy(): OppenURI = OppenURI(ouri)
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override fun toString(): String = ouri
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private fun String.removeFile(): String{
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return this.substring(0, ouri.lastIndexOf("/") + 1)
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}
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}
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