[goose-llm] kotlin fn for getting structured outputs (#2547)

crates/goose-llm/src/structured_outputs.rs

@@ -0,0 +1,29 @@
+use crate::{
+    providers::{create, errors::ProviderError, ProviderExtractResponse},
+    types::json_value_ffi::JsonValueFfi,
+    Message, ModelConfig,
+};
+
+/// Generates a structured output based on the provided schema,
+/// system prompt and user messages.
+#[uniffi::export(async_runtime = "tokio")]
+pub async fn generate_structured_outputs(
+    provider_name: &str,
+    provider_config: JsonValueFfi,
+    system_prompt: &str,
+    messages: &[Message],
+    schema: JsonValueFfi,
+) -> Result<ProviderExtractResponse, ProviderError> {
+    // Use OpenAI models specifically for this task
+    let model_name = if provider_name == "databricks" {
+        "goose-gpt-4-1"
+    } else {
+        "gpt-4.1"
+    };
+    let model_cfg = ModelConfig::new(model_name.to_string()).with_temperature(Some(0.0));
+    let provider = create(provider_name, provider_config, model_cfg)?;
+
+    let resp = provider.extract(system_prompt, messages, &schema).await?;
+
+    Ok(resp)
+}