feat(webui): proper set operations

webui/src/components/CombineColumn.svelte

@@ -12,15 +12,22 @@
 
   export let spec: string;
 
-  const individualSpecs = spec.split(/(?=[+-])/);
+  const individualSpecs = spec.split(/(?=[+=-])/);
   let includedGroups = individualSpecs
     .filter((s) => s.startsWith("+"))
     .map((s) => s.slice(1));
+  let requiredGroups = individualSpecs
+    .filter((s) => s.startsWith("="))
+    .map((s) => s.slice(1));
   let excludedGroups = individualSpecs
     .filter((s) => s.startsWith("-"))
     .map((s) => s.slice(1));
 
-  $: if (includedGroups.length == 0 && excludedGroups.length == 0) {
+  $: if (
+    includedGroups.length === 0 &&
+    requiredGroups.length === 0 &&
+    excludedGroups.length === 0
+  ) {
     dispatch("close");
   }
 
@@ -56,6 +63,7 @@
   let resultEntities = [];
   async function updateResultEntities(
     includedGroups: string[],
+    requiredGroups: string[],
     excludedGroups: string[],
   ) {
     const included = includedGroups.length
@@ -69,6 +77,17 @@
           )
         ).objects
       : [];
+    const required = requiredGroups.length
+      ? (
+          await api.query(
+            new Query().matches(
+              undefined,
+              ATTR_IN,
+              requiredGroups.map((g) => `@${g}`),
+            ),
+          )
+        ).objects
+      : [];
     const excluded = excludedGroups.length
       ? (
           await api.query(
@@ -80,9 +99,11 @@
           )
         ).objects
       : [];
-    resultEntities = Object.keys(included).filter((e) => !(e in excluded));
+    resultEntities = Object.keys(included)
+      .filter((e) => !requiredGroups.length || Object.keys(required).includes(e))
+      .filter((e) => !Object.keys(excluded).includes(e));
   }
-  $: updateResultEntities(includedGroups, excludedGroups);
+  $: updateResultEntities(includedGroups, requiredGroups, excludedGroups);
 </script>
 
 <div class="view" data-address-multi={resultEntities}>
@@ -98,6 +119,13 @@
       on:remove={(ev) =>
         (includedGroups = includedGroups.filter((e) => e !== ev.detail))}
     />
+    <EntitySetEditor
+      entities={requiredGroups}
+      header={$i18n.t("Require")}
+      on:add={(ev) => (requiredGroups = [...requiredGroups, ev.detail])}
+      on:remove={(ev) =>
+        (requiredGroups = requiredGroups.filter((e) => e !== ev.detail))}
+    />
     <EntitySetEditor
       entities={excludedGroups}
       header={$i18n.t("Exclude")}