Function celMatcherJSONMacroExpander

modules/caddyhttp/celmatcher.go:629–660

celMatcherJSONMacroExpander validates that the macro is called a single map literal argument. The following function call is returned: <funcName>(request, arg)

(funcName string)

//
// The following function call is returned: <funcName>(request, arg)
func celMatcherJSONMacroExpander(funcName string) parser.MacroExpander {
	return func(eh cel.MacroExprFactory, target ast.Expr, args []ast.Expr) (ast.Expr, *common.Error) {
		if len(args) != 1 {
			return nil, eh.NewError(0, "matcher requires a map literal argument")
		}
		arg := args[0]

		switch arg.Kind() {
		case ast.StructKind:
			return nil, eh.NewError(arg.ID(),
				fmt.Sprintf("matcher input must be a map literal, not a %s", arg.AsStruct().TypeName()))
		case ast.MapKind:
			mapExpr := arg.AsMap()
			for _, entry := range mapExpr.Entries() {
				isStringPlaceholder := isCELStringExpr(entry.AsMapEntry().Key())
				if !isStringPlaceholder {
					return nil, eh.NewError(entry.ID(), "matcher map keys must be string literals")
				}
				isStringListPlaceholder := isCELStringExpr(entry.AsMapEntry().Value()) ||
					isCELStringListLiteral(entry.AsMapEntry().Value())
				if !isStringListPlaceholder {
					return nil, eh.NewError(entry.AsMapEntry().Value().ID(), "matcher map values must be string or list literals")
				}
			}
			return eh.NewCall(funcName, eh.NewIdent(CELRequestVarName), arg), nil
		case ast.UnspecifiedExprKind, ast.CallKind, ast.ComprehensionKind, ast.IdentKind, ast.ListKind, ast.LiteralKind, ast.SelectKind:
			// appeasing the linter :)
		}

		return nil, eh.NewError(arg.ID(), "matcher requires a map literal argument")
	}
}

// CELValueToMapStrList converts a CEL value to a map[string][]string
//