View source for Mobile Apps 2023W Lecture 17

==Code==

<syntaxhighlight lang="kotlin" line>
package carleton.comp2601.historyviewer

class HNTree {
    var hostComponent: String = ""
    var hostSuffix: String = ""
    var parent: HNTree = this
    var children: MutableList<HNTree> = mutableListOf()
    var treeLevel: Int = 0
    var expanded: true

    fun add(hostPrefix: String) {
        var allComponents: List<String>
        var component: String
        var child: HNTree? = null

        /* still have to deal with getting to the end */

        allComponents = hostPrefix.split(".")
        if (allComponents.last() == "") {
            allComponents = allComponents.dropLast(1)
        }
        component = allComponents.last()

        if (component == hostPrefix) {
            return
        }

        for (c in this.children) {
                 if (c.hostComponent == component) {
                     child = c
                     break
                 }
        }

        if (child == null) {
            child = HNTree()
            child.parent = this
            child.hostComponent = component
            child.hostSuffix = "$component.$hostSuffix"
            child.treeLevel++
            children.add(child)
        }

        child.add(allComponents.dropLast(1).joinToString())
    }

    fun nextNodes(n: Int): List<HNTree> {
        for (i in 0..n -1) {

        }
    }
}
</syntaxhighlight>