pkg/struct: add Min/MaxFields builtins
- also define their mappings to OpenAPI
Issue #56
Change-Id: I3db075ea25d5e5df8bf3a003fd881862e73be683
Reviewed-on: https://cue-review.googlesource.com/c/cue/+/2685
Reviewed-by: Marcel van Lohuizen <mpvl@golang.org>
diff --git a/encoding/openapi/build.go b/encoding/openapi/build.go
index 70ab78c..f6ddbbc 100644
--- a/encoding/openapi/build.go
+++ b/encoding/openapi/build.go
@@ -466,6 +466,36 @@
// object composed of the same type, if a property is required and set to a
// constant value for each type, it is a discriminator.
+ switch op, a := v.Expr(); op {
+ case cue.CallOp:
+ name := fmt.Sprint(a[0])
+ switch name {
+ case "struct.MinFields":
+ if len(a) != 2 {
+ b.failf(v, "builtin %v must be called with one argument", name)
+ }
+ b.setFilter("Schema", "minProperties", b.int(a[1]))
+ return
+
+ case "struct.MaxFields":
+ if len(a) != 2 {
+ b.failf(v, "builtin %v must be called with one argument", name)
+ }
+ b.setFilter("Schema", "maxProperties", b.int(a[1]))
+ return
+
+ default:
+ b.failf(v, "builtin %v not supported in OpenAPI", name)
+ }
+
+ case cue.NoOp:
+ // TODO: extract format from specific type.
+
+ default:
+ b.failf(v, "unsupported op %v for number type", op)
+ return
+ }
+
required := []string{}
for i, _ := v.Fields(cue.Optional(false), cue.Hidden(false)); i.Next(); {
required = append(required, i.Label())
