diff -r 8c088c628a20 -r f8f5e82944fa src/main/kotlin/de/uapcore/lightpit/viewmodel/Issues.kt
--- a/src/main/kotlin/de/uapcore/lightpit/viewmodel/Issues.kt	Sun Jan 08 17:57:05 2023 +0100
+++ b/src/main/kotlin/de/uapcore/lightpit/viewmodel/Issues.kt	Sun Jan 08 19:32:11 2023 +0100
@@ -38,10 +38,20 @@
 
 class IssueSorter(private vararg val criteria: Criteria) : Comparator<Issue> {
     enum class Field {
-        DONE, PHASE, STATUS, CATEGORY, ETA, UPDATED, CREATED
+        DONE, PHASE, STATUS, CATEGORY, ETA, UPDATED, CREATED;
+
+        val resourceKey: String by lazy {
+            if (this == DONE) "issue.filter.sort.done"
+            else if (this == PHASE) "issue.filter.sort.phase"
+            else "issue.${this.name.lowercase()}"
+        }
     }
 
-    data class Criteria(val field: Field, val asc: Boolean = true)
+    data class Criteria(val field: Field, val asc: Boolean = true) {
+        override fun toString(): String {
+            return "$field.$asc"
+        }
+    }
 
     override fun compare(left: Issue, right: Issue): Int {
         if (left == right) {
@@ -170,6 +180,7 @@
 
     val issueStatus = IssueStatus.values()
     val issueCategory = IssueCategory.values()
+    val sortCriteria = IssueSorter.Field.values().flatMap { listOf(IssueSorter.Criteria(it, true), IssueSorter.Criteria(it, false)) }
     val flagIncludeDone = "f.0"
     val flagMine = "f.1"
     val flagBlocker = "f.2"
@@ -180,6 +191,26 @@
     val status: List<IssueStatus> = evalEnum(http, "s")
     val category: List<IssueCategory> = evalEnum(http, "c")
 
+    val sortPrimary: IssueSorter.Criteria = evalSort(http, "primary", IssueSorter.Criteria(IssueSorter.Field.DONE))
+    val sortSecondary: IssueSorter.Criteria = evalSort(http, "secondary", IssueSorter.Criteria(IssueSorter.Field.ETA))
+    val sortTertiary: IssueSorter.Criteria = evalSort(http, "tertiary", IssueSorter.Criteria(IssueSorter.Field.UPDATED, false))
+
+    private fun evalSort(http: HttpRequest, prio: String, defaultValue: IssueSorter.Criteria): IssueSorter.Criteria {
+        val param = http.param("sort_$prio")
+        if (param != null) {
+            http.session.removeAttribute("sort_$prio")
+            val p = param.split(".")
+            if (p.size > 1) {
+                try {
+                    http.session.setAttribute("sort_$prio", IssueSorter.Criteria(enumValueOf(p[0]), p[1].toBoolean()))
+                } catch (_:IllegalArgumentException) {
+                    // ignore malfored values
+                }
+            }
+        }
+        return http.session.getAttribute("sort_$prio") as IssueSorter.Criteria? ?: defaultValue
+    }
+
     private fun evalFlag(http: HttpRequest, name: String): Boolean {
         val param = http.paramArray("filter")
         if (param.isNotEmpty()) {