shape/
display.rs

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use std::fmt::Debug;
use std::fmt::Display;

use super::helpers::quote_string;
use super::NamedShapePathKey;
use super::Shape;
use super::ShapeCase;

impl Shape {
    /// Returns a string representation of the [`Shape`].
    ///
    /// Please note: this display format does not imply an input syntax or
    /// parser for the shape language. To create new [`Shape`] elements, use the
    /// various `Shape::*` helper functions.
    pub fn pretty_print(&self) -> String {
        self.case.pretty_print()
    }
}

impl ShapeCase {
    pub fn pretty_print(&self) -> String {
        match self {
            Self::Bool(Some(b)) => b.to_string(),
            Self::Bool(None) => "Bool".to_string(),
            Self::String(Some(s)) => quote_string(s.as_str()),
            Self::String(None) => "String".to_string(),
            Self::Int(Some(i)) => i.to_string(),
            Self::Int(None) => "Int".to_string(),
            Self::Float => "Float".to_string(),
            Self::Null => "null".to_string(), // No typo: JSON null is lowercase.

            // There may be some argument for using lower-case "none" here,
            // since None is not a reserved/built-in GraphQL type name like
            // Bool, String, Int, and Float are, so someone could define a
            // custom GraphQL None type that would collide with this Shape name.
            Self::None => "None".to_string(),

            Self::Array { prefix, tail } => {
                if prefix.is_empty() {
                    if tail.is_none() {
                        "[]".to_string()
                    } else {
                        format!("List<{}>", tail.pretty_print())
                    }
                } else {
                    let mut result = "[".to_string();
                    for (i, shape) in prefix.iter().enumerate() {
                        if i > 0 {
                            result.push_str(", ");
                        }
                        result.push_str(&shape.pretty_print());
                    }
                    if !tail.is_none() {
                        result.push_str(&format!(", ...List<{}>", tail.pretty_print()));
                    }
                    result.push_str("]");
                    result
                }
            }

            Self::Object { fields, rest } => {
                if fields.is_empty() && !rest.is_none() {
                    format!("Dict<{}>", rest.pretty_print())
                } else {
                    let mut result = "{".to_string();

                    if !fields.is_empty() {
                        result.push(' ');

                        let mut sorted_field_names = fields.keys().collect::<Vec<_>>();
                        sorted_field_names.sort();
                        for (i, field_name) in sorted_field_names.into_iter().enumerate() {
                            if i > 0 {
                                result.push_str(", ");
                            }
                            result.push_str(&format!(
                                "{}: {}",
                                field_name,
                                fields[field_name].pretty_print()
                            ));
                        }
                    }

                    if !rest.is_none() {
                        if !fields.is_empty() {
                            result.push_str(",");
                        }
                        result.push_str(format!(" ...Dict<{}>", rest.pretty_print()).as_str());
                    }

                    if result.starts_with("{ ") {
                        result.push_str(" }");
                    } else {
                        result.push_str("}");
                    }

                    result
                }
            }

            Self::One(shapes) => {
                let mut result = "One<".to_string();
                for (i, shape) in shapes.iter().enumerate() {
                    if i > 0 {
                        result.push_str(", ");
                    }
                    result.push_str(shape.pretty_print().as_str());
                }
                result.push_str(">");
                result
            }

            Self::All(shapes) => {
                let mut result = "All<".to_string();
                for (i, shape) in shapes.iter().enumerate() {
                    if i > 0 {
                        result.push_str(", ");
                    }
                    result.push_str(shape.pretty_print().as_str());
                }
                result.push_str(">");
                result
            }

            Self::Name(name, path) => {
                let mut dotted_path = name.clone();
                dotted_path.push_str(NamedShapePathKey::path_to_string(&path).as_str());
                dotted_path
            }

            Self::Error {
                message, partial, ..
            } => {
                let mut result = format!("Error<{}", quote_string(message.as_str()));
                if let Some(partial) = partial {
                    result.push_str(&format!(", {}", partial.pretty_print()));
                }
                result.push_str(">");
                result
            }
        }
    }
}

impl Display for Shape {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        write!(f, "{}", self.pretty_print())
    }
}

impl Debug for Shape {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        write!(f, "{}", self.pretty_print())
    }
}

impl Display for ShapeCase {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        write!(f, "{}", self.pretty_print())
    }
}

impl Debug for ShapeCase {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        write!(f, "{}", self.pretty_print())
    }
}