Fix input type for embedding

Author: dongri

examples/embedding.rs

@@ -8,7 +8,7 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
     let client = OpenAIClient::new(env::var("OPENAI_API_KEY").unwrap().to_string());
 
     let mut req =
-        EmbeddingRequest::new(TEXT_EMBEDDING_3_SMALL.to_string(), "story time".to_string());
+        EmbeddingRequest::new(TEXT_EMBEDDING_3_SMALL.to_string(), vec!["story time".to_string(), "Once upon a time".to_string()]);
     req.dimensions = Some(10);
 
     let result = client.embedding(req).await?;

src/v1/embedding.rs

@@ -11,21 +11,30 @@ pub struct EmbeddingData {
     pub index: i32,
 }
 
+#[derive(Debug, Serialize, Deserialize, Clone)]
+#[serde(rename_all = "lowercase")]
+pub enum EncodingFormat {
+    Float,
+    Base64,
+}
+
 #[derive(Debug, Serialize, Clone, Deserialize)]
 pub struct EmbeddingRequest {
     pub model: String,
-    pub input: String,
+    pub input: Vec<String>,
+    pub encoding_format: Option<EncodingFormat>,
     #[serde(skip_serializing_if = "Option::is_none")]
     pub dimensions: Option<i32>,
     #[serde(skip_serializing_if = "Option::is_none")]
     pub user: Option<String>,
 }
 
 impl EmbeddingRequest {
-    pub fn new(model: String, input: String) -> Self {
+    pub fn new(model: String, input: Vec<String>) -> Self {
         Self {
             model,
             input,
+            encoding_format: None,
             dimensions: None,
             user: None,
         }