serverHelpers.go.tmpl

{{- define "server_helpers" -}}
{{- $messages := .Types -}}
{{- $typeMap := .TypeMap -}}

{{- range $messages }}
def validate_{{ .Name }}(value):
    {{- stderrPrintf "OPTS: %q" .Fields -}}
    {{- range .Fields }}
        {{- if .Optional }}
            if "{{ template "fieldName" dict "Field" . }}" in value and not validate_type(value["{{ template "fieldName" dict "Field" . }}"], "{{ template "pyType" dict "Type" .Type "TypeMap" $typeMap }}"):
                return False
        {{- else }}
             if "{{ template "fieldName" dict "Field" . }}" not in value or not validate_type(value["{{ template "fieldName" dict "Field" . }}"], "{{ template "pyType" dict "Type" .Type "TypeMap" $typeMap }}"):
                return False
        {{- end }}
    {{- end }}

    return True
{{- end }}


TYPE_VALIDATORS: Dict[str, Callable[[any], bool]] = {}

TYPE_VALIDATORS = {
    {{ range $messages }}
        {{ .Name }}: validate{{ .Name }},
    {{ end }}
}

PY_TYPES = [
    "bool",
    "int",
    "float",
    "str",
    "list",
    "tuple",
    "dict",
    "NoneType"
]

def validate_type(value, type):
    if type in PY_TYPES:
        return isinstance(value, type)

    if type == "function":
        return callable(value)

    validator = TYPE_VALIDATORS.get(type)

    if not validator:
        return False

    return validator(value)

{{- end -}}