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use openapi_to_rust::{CodeGenerator, GeneratorConfig, SchemaAnalyzer};
use serde_json::json;
fn main() -> Result<(), Box<dyn std::error::Error>> {
// Create an OpenAPI spec with explicit discriminator mappings
let test_spec = json!({
"openapi": "3.1.0",
"info": {
"title": "Discriminator Mappings Test API",
"version": "1.0.0"
},
"components": {
"schemas": {
"Cat": {
"type": "object",
"properties": {
"petType": {
"type": "string",
"enum": ["cat"]
},
"name": {
"type": "string"
},
"huntingSkill": {
"type": "string",
"enum": ["clueless", "lazy", "adventurous", "aggressive"]
}
},
"required": ["petType", "name"]
},
"Dog": {
"type": "object",
"properties": {
"petType": {
"type": "string",
"enum": ["dog"]
},
"name": {
"type": "string"
},
"packSize": {
"type": "integer",
"format": "int32",
"minimum": 0
}
},
"required": ["petType", "name"]
},
"Bird": {
"type": "object",
"properties": {
"petType": {
"type": "string",
"enum": ["bird"]
},
"name": {
"type": "string"
},
"wingspan": {
"type": "number",
"format": "float",
"minimum": 0
}
},
"required": ["petType", "name"]
},
"Pet": {
"oneOf": [
{"$ref": "#/components/schemas/Cat"},
{"$ref": "#/components/schemas/Dog"},
{"$ref": "#/components/schemas/Bird"}
],
"discriminator": {
"propertyName": "petType",
"mapping": {
"cat": "#/components/schemas/Cat",
"dog": "#/components/schemas/Dog",
"bird": "#/components/schemas/Bird"
}
},
"description": "A pet that can be a cat, dog, or bird with explicit mappings"
},
"VehicleEngine": {
"type": "object",
"properties": {
"type": {
"type": "string",
"enum": ["engine"]
},
"horsepower": {
"type": "integer"
}
},
"required": ["type"]
},
"VehicleElectric": {
"type": "object",
"properties": {
"type": {
"type": "string",
"enum": ["electric"]
},
"batteryCapacity": {
"type": "number"
}
},
"required": ["type"]
},
"Vehicle": {
"oneOf": [
{"$ref": "#/components/schemas/VehicleEngine"},
{"$ref": "#/components/schemas/VehicleElectric"}
],
"discriminator": {
"propertyName": "type",
"mapping": {
"gas": "#/components/schemas/VehicleEngine",
"electric": "#/components/schemas/VehicleElectric"
}
},
"description": "Vehicle with custom discriminator values that don't match enum values"
}
}
}
});
println!("Creating schema analyzer for discriminator mappings test...");
let mut analyzer = SchemaAnalyzer::new(test_spec)?;
println!("Analyzing schemas...");
let mut analysis = analyzer.analyze()?;
println!("Found {} schemas:", analysis.schemas.len());
for (name, schema) in &analysis.schemas {
println!(
" - {}: {:?}",
name,
match &schema.schema_type {
openapi_to_rust::analysis::SchemaType::DiscriminatedUnion {
discriminator_field,
variants,
} => {
let variant_info: Vec<String> = variants
.iter()
.map(|v| {
format!(
"{}='{}' -> {}",
v.rust_name, v.discriminator_value, v.type_name
)
})
.collect();
format!(
"DiscriminatedUnion(discriminator: {}, variants: [{}])",
discriminator_field,
variant_info.join(", ")
)
}
openapi_to_rust::analysis::SchemaType::Object { properties, .. } => {
format!("Object({} properties)", properties.len())
}
other => format!("{other:?}"),
}
);
}
println!("\nDetected patterns:");
println!(
" Tagged enums: {:?}",
analysis.patterns.tagged_enum_schemas
);
println!(" Type mappings: {:?}", analysis.patterns.type_mappings);
println!("\nGenerating code...");
let config = GeneratorConfig {
module_name: "discriminator_api".to_string(),
..Default::default()
};
let generator = CodeGenerator::new(config);
let generated_code = generator.generate(&mut analysis)?;
println!("\nGenerated code:");
println!("{generated_code}");
Ok(())
}