Stop requiring a fabric index to be provided when writing fabric-scop…

…ed structs with chip-tool. (#17145)

It's ignored on the server anyway, so no need to require people to send it.

examples/chip-tool/templates/ComplexArgumentParser-src.zapt

@@ -9,20 +9,29 @@ CHIP_ERROR ComplexArgumentParser::Setup(const char * label, {{zapTypeToEncodable
 
     {{#zcl_struct_items}}
     {{#unless isOptional}}
+    {{~! Fabric index fields are not sent on writes, so don't force people to
+      provide them. ~}}
+    {{#unless (isStrEqual label ../struct_fabric_idx_field)}}
     ReturnErrorOnFailure(ComplexArgumentParser::EnsureMemberExist("{{parent.name}}.{{asLowerCamelCase label}}", "{{asLowerCamelCase label}}", value.isMember("{{asLowerCamelCase label}}")));
     {{/unless}}
+    {{/unless}}
     {{/zcl_struct_items}}
 
     char labelWithMember[kMaxLabelLength];
     {{#zcl_struct_items}}
     {{#if isOptional}}
     if (value.isMember("{{asLowerCamelCase label}}"))
     {
+    {{else if (isStrEqual label ../struct_fabric_idx_field)}}
+    if (value.isMember("{{asLowerCamelCase label}}"))
+    {
     {{/if}}
     snprintf(labelWithMember, sizeof(labelWithMember), "%s.%s", label, "{{asLowerCamelCase label}}");
     ReturnErrorOnFailure(ComplexArgumentParser::Setup(labelWithMember, request.{{asLowerCamelCase label}}, value["{{asLowerCamelCase label}}"]));
     {{#if isOptional}}
     }
+    {{else if (isStrEqual label ../struct_fabric_idx_field)}}
+    }
     {{/if}}
 
     {{/zcl_struct_items}}

examples/chip-tool/templates/helper.js

@@ -116,13 +116,21 @@ async function structs_with_cluster_name(options)
       continue;
     }
 
-    if (s.struct_cluster_count == 1) {
+    s.items.forEach(i => {
+      if (i.type.toLowerCase() == "fabric_idx") {
+        s.struct_fabric_idx_field = i.label;
+      }
+    })
+
+    if (s.struct_cluster_count == 1)
+    {
       const clusters = await zclQuery.selectStructClusters(this.global.db, s.id);
-      blocks.push({ id : s.id, name : s.name, clusterName : clusters[0].name });
+      blocks.push(
+          { id : s.id, name : s.name, struct_fabric_idx_field : s.struct_fabric_idx_field, clusterName : clusters[0].name });
     }
 
     if (s.struct_cluster_count > 1) {
-      blocks.push({ id : s.id, name : s.name, clusterName : "detail" });
+      blocks.push({ id : s.id, name : s.name, struct_fabric_idx_field : s.struct_fabric_idx_field, clusterName : "detail" });
     }
   }