78 lines
2.6 KiB
Rust
78 lines
2.6 KiB
Rust
use anyhow::Result;
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use language_model::LanguageModelToolSchemaFormat;
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use schemars::{
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JsonSchema,
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schema::{RootSchema, Schema, SchemaObject},
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};
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pub fn json_schema_for<T: JsonSchema>(
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format: LanguageModelToolSchemaFormat,
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) -> Result<serde_json::Value> {
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let schema = root_schema_for::<T>(format);
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schema_to_json(&schema, format)
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}
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fn schema_to_json(
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schema: &RootSchema,
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format: LanguageModelToolSchemaFormat,
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) -> Result<serde_json::Value> {
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let mut value = serde_json::to_value(schema)?;
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assistant_tool::adapt_schema_to_format(&mut value, format)?;
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Ok(value)
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}
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fn root_schema_for<T: JsonSchema>(format: LanguageModelToolSchemaFormat) -> RootSchema {
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let mut generator = match format {
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LanguageModelToolSchemaFormat::JsonSchema => schemars::SchemaGenerator::default(),
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LanguageModelToolSchemaFormat::JsonSchemaSubset => {
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schemars::r#gen::SchemaSettings::default()
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.with(|settings| {
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settings.meta_schema = None;
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settings.inline_subschemas = true;
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settings
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.visitors
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.push(Box::new(TransformToJsonSchemaSubsetVisitor));
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})
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.into_generator()
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}
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};
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generator.root_schema_for::<T>()
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}
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#[derive(Debug, Clone)]
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struct TransformToJsonSchemaSubsetVisitor;
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impl schemars::visit::Visitor for TransformToJsonSchemaSubsetVisitor {
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fn visit_root_schema(&mut self, root: &mut RootSchema) {
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schemars::visit::visit_root_schema(self, root)
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}
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fn visit_schema(&mut self, schema: &mut Schema) {
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schemars::visit::visit_schema(self, schema)
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}
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fn visit_schema_object(&mut self, schema: &mut SchemaObject) {
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// Ensure that the type field is not an array, this happens when we use
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// Option<T>, the type will be [T, "null"].
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if let Some(instance_type) = schema.instance_type.take() {
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schema.instance_type = match instance_type {
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schemars::schema::SingleOrVec::Single(t) => {
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Some(schemars::schema::SingleOrVec::Single(t))
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}
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schemars::schema::SingleOrVec::Vec(items) => items
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.into_iter()
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.next()
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.map(schemars::schema::SingleOrVec::from),
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};
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}
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// One of is not supported, use anyOf instead.
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if let Some(subschema) = schema.subschemas.as_mut() {
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if let Some(one_of) = subschema.one_of.take() {
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subschema.any_of = Some(one_of);
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}
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}
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schemars::visit::visit_schema_object(self, schema)
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}
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}
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