2020-03-03 11:15:18 +00:00
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use crate::{GQLType, Result};
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2020-03-01 10:54:34 +00:00
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use graphql_parser::query::Value;
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#[doc(hidden)]
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pub struct GQLEnumItem<T> {
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pub name: &'static str,
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pub value: T,
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}
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#[doc(hidden)]
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#[async_trait::async_trait]
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pub trait GQLEnum: GQLType + Sized + Eq + Send + Copy + Sized + 'static {
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fn items() -> &'static [GQLEnumItem<Self>];
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2020-03-04 02:38:07 +00:00
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fn parse_enum(value: &Value) -> Option<Self> {
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2020-03-01 10:54:34 +00:00
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match value {
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Value::Enum(s) => {
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let items = Self::items();
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for item in items {
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if item.name == s {
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2020-03-03 11:15:18 +00:00
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return Some(item.value);
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2020-03-01 10:54:34 +00:00
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}
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}
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}
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2020-03-03 11:15:18 +00:00
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_ => {}
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2020-03-01 10:54:34 +00:00
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}
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2020-03-03 11:15:18 +00:00
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None
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2020-03-01 10:54:34 +00:00
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}
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2020-03-04 02:38:07 +00:00
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fn parse_json_enum(value: &serde_json::Value) -> Option<Self> {
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2020-03-01 16:52:05 +00:00
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match value {
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serde_json::Value::String(s) => {
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let items = Self::items();
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for item in items {
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if item.name == s {
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2020-03-03 11:15:18 +00:00
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return Some(item.value);
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2020-03-01 16:52:05 +00:00
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}
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}
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}
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2020-03-03 11:15:18 +00:00
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_ => {}
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2020-03-01 16:52:05 +00:00
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}
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2020-03-03 11:15:18 +00:00
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None
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2020-03-01 16:52:05 +00:00
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}
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2020-03-02 00:24:49 +00:00
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fn resolve_enum(&self) -> Result<serde_json::Value> {
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2020-03-01 10:54:34 +00:00
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let items = Self::items();
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for item in items {
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2020-03-02 00:24:49 +00:00
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if item.value == *self {
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2020-03-01 10:54:34 +00:00
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return Ok(item.name.clone().into());
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}
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}
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unreachable!()
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}
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}
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