use std::fmt;
use crate::{ArgumentsDefinition, InputValueDefinition, StringValue};
#[derive(Debug)]
pub struct DirectiveDefinition {
name: String,
description: Option<StringValue>,
args: ArgumentsDefinition,
locations: Vec<String>,
repeatable: bool,
}
impl DirectiveDefinition {
pub fn new(name: String) -> Self {
Self {
name,
description: None,
args: ArgumentsDefinition::new(),
locations: Vec::new(),
repeatable: false,
}
}
pub fn description(&mut self, description: String) {
self.description = Some(StringValue::Top {
source: description,
});
}
pub fn location(&mut self, location: String) {
self.locations.push(location);
}
pub fn arg(&mut self, arg: InputValueDefinition) {
self.args.input_value(arg);
}
pub fn repeatable(&mut self) {
self.repeatable = true;
}
}
impl fmt::Display for DirectiveDefinition {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
if let Some(description) = &self.description {
write!(f, "{}", description)?;
}
write!(f, "directive @{}", self.name)?;
if !self.args.input_values.is_empty() {
write!(f, "{}", self.args)?;
}
if self.repeatable {
write!(f, " repeatable")?;
}
for (i, location) in self.locations.iter().enumerate() {
match i {
0 => write!(f, " on {}", location)?,
_ => write!(f, " | {}", location)?,
}
}
writeln!(f)
}
}
#[cfg(test)]
mod tests {
use super::*;
use crate::Type_;
use pretty_assertions::assert_eq;
#[test]
fn it_encodes_directives_for_a_single_location() {
let mut directive = DirectiveDefinition::new("infer".to_string());
directive.description("Infer field types from field values.".to_string());
directive.location("OBJECT".to_string());
assert_eq!(
directive.to_string(),
r#""Infer field types from field values."
directive @infer on OBJECT
"#
);
}
#[test]
fn it_encodes_directives_for_multiple_location() {
let mut directive = DirectiveDefinition::new("infer".to_string());
directive.description("Infer field types\nfrom field values.".to_string());
directive.location("OBJECT".to_string());
directive.location("FIELD_DEFINITION".to_string());
directive.location("INPUT_FIELD_DEFINITION".to_string());
assert_eq!(
directive.to_string(),
r#""""
Infer field types
from field values.
"""
directive @infer on OBJECT | FIELD_DEFINITION | INPUT_FIELD_DEFINITION
"#
);
}
#[test]
fn it_encodes_directives_with_arguments() {
let mut directive = DirectiveDefinition::new("infer".to_string());
directive.description("Infer field types from field values.".to_string());
directive.location("OBJECT".to_string());
let ty_1 = Type_::NamedType {
name: "SpaceProgram".to_string(),
};
let ty_2 = Type_::List { ty: Box::new(ty_1) };
let arg = InputValueDefinition::new("cat".to_string(), ty_2);
directive.arg(arg);
assert_eq!(
directive.to_string(),
r#""Infer field types from field values."
directive @infer(cat: [SpaceProgram]) on OBJECT
"#
);
}
#[test]
fn it_encodes_directives_with_arguments_with_description() {
let mut directive = DirectiveDefinition::new("infer".to_string());
directive.description("Infer field types from field values.".to_string());
directive.location("OBJECT".to_string());
let ty_1 = Type_::NamedType {
name: "SpaceProgram".to_string(),
};
let ty_2 = Type_::List { ty: Box::new(ty_1) };
let mut arg = InputValueDefinition::new("cat".to_string(), ty_2);
arg.description("Space Program for flying cats".to_string());
directive.arg(arg);
assert_eq!(
directive.to_string(),
r#""Infer field types from field values."
directive @infer(
"Space Program for flying cats"
cat: [SpaceProgram]
) on OBJECT
"#
);
}
}