add support for sort functions

wizard-common/src/main/java/org/cobbzilla/wizard/model/search/SearchQuery.java

@@ -19,9 +19,6 @@ import static org.cobbzilla.wizard.model.Identifiable.CTIME;
 @NoArgsConstructor @Accessors(chain=true) @ToString
 public class SearchQuery {
 
-    public static final String ASC = SortOrder.ASC.toString();
-    public static final String DESC = SortOrder.DESC.toString();
-
     public static final String PARAM_USE_PAGINATION = "page";
     public static final String PARAM_PAGE_NUMBER    = "pn";
     public static final String PARAM_PAGE_SIZE      = "ps";
@@ -184,7 +181,10 @@ public class SearchQuery {
         final StringBuilder b = new StringBuilder();
         for (SearchSort s : sorts) {
             if (b.length() > 0) b.append(", ");
-            b.append(entityAlias).append(".").append(s.getSortField()).append(" ").append(s.getSortOrder().name());
+            b.append(s.hasFunc() ? s.getFunc()+"(" : "")
+                    .append(entityAlias).append(".").append(s.getSortField())
+                    .append(s.hasFunc() ? ")" : "")
+                    .append(" ").append(s.getSortOrder().name());
         }
         return b.toString();
     }

wizard-common/src/main/java/org/cobbzilla/wizard/model/search/SearchSort.java

@@ -2,11 +2,20 @@ package org.cobbzilla.wizard.model.search;
 
 import lombok.*;
 
-@NoArgsConstructor @AllArgsConstructor @EqualsAndHashCode(of={"sortField", "sortOrder"})
+import static org.cobbzilla.util.daemon.ZillaRuntime.empty;
+
+@NoArgsConstructor @AllArgsConstructor @EqualsAndHashCode(of={"sortField", "sortOrder", "func"})
 public class SearchSort {
 
     @Getter @Setter private String sortField;
     @Getter @Setter private SortOrder sortOrder = SortOrder.ASC;
+    @Getter @Setter private String func;
+    public boolean hasFunc () { return !empty(func); }
+
+    public SearchSort(String sortField, SortOrder sortOrder) {
+        this.sortField = sortField;
+        this.sortOrder = sortOrder;
+    }
 
     public SearchSort(String sort) {
         if (sort.startsWith("+") || sort.startsWith(" ")) {

wizard-server/src/main/java/org/cobbzilla/wizard/dao/SqlViewSearchHelper.java

@@ -66,7 +66,10 @@ public class SqlViewSearchHelper {
                 final String sortField = dao.getSortField(s.getSortField());
                 sortedFields.add(sortField);
                 if (sort.length() > 0) sort.append(", ");
-                sort.append(sortField).append(" ").append(s.getSortOrder().name());
+                sort.append(s.hasFunc() ? s.getFunc()+"(" : "")
+                        .append(sortField)
+                        .append(s.hasFunc() ? ")" : "")
+                        .append(" ").append(s.getSortOrder().name());
             }
         } else {
             final String defaultSort = dao.getDefaultSort();
@@ -161,7 +164,8 @@ public class SqlViewSearchHelper {
                 final SqlViewField sqlViewField = Arrays.stream(fields).filter(a -> a.getName().equals(sortField)).findFirst().orElse(null);
                 if (sqlViewField == null) return die("search: sort field not defined/mapped: " + sortField);
 
-                final Comparator<E> comparator = (E o1, E o2) -> compareSelectedItems(o1, o2, sqlViewField);
+                final String func = searchQuery.getSorts()[i].getFunc();
+                final Comparator<E> comparator = (E o1, E o2) -> compareSelectedItems(o1, o2, sqlViewField, func);
 
                 if (searchQuery.getSorts()[i].getSortOrder() == ASC) {
                     matched.sort(comparator);
@@ -185,7 +189,7 @@ public class SqlViewSearchHelper {
         }
     }
 
-    private static <E extends Identifiable> int compareSelectedItems(E o1, E o2, SqlViewField field) {
+    private static <E extends Identifiable> int compareSelectedItems(E o1, E o2, SqlViewField field, String func) {
         Object fieldObject1;
         Object fieldObject2;
 
@@ -203,6 +207,21 @@ public class SqlViewSearchHelper {
         if (fieldObject1 == null && fieldObject2 != null) return 1;
         if (fieldObject1 != null && fieldObject2 == null) return -1;
 
+        if (func != null) {
+            switch (func) {
+                case "lower":
+                    fieldObject1 = fieldObject1.toString().toLowerCase();
+                    fieldObject2 = fieldObject2.toString().toLowerCase();
+                    break;
+                case "upper":
+                    fieldObject1 = fieldObject1.toString().toUpperCase();
+                    fieldObject2 = fieldObject2.toString().toUpperCase();
+                    break;
+                default:
+                    return die("compareSelectedItems: unsupported function: "+func);
+            }
+        }
+
         Class sortedFieldClass = ReflectionUtil.getSimpleClass(fieldObject1);
         if (sortedFieldClass.equals(String.class)) {
             return ((String) fieldObject1).compareTo((String) fieldObject2);