Struct Message 

pub struct Message {
    pub role: MessageRole,
    pub content: String,
    pub tool_calls: Option<Vec<ToolCall>>,
    pub tool_call_id: Option<String>,
}

Universal message structure

Fields

role: MessageRole

content: String

tool_calls: Option<Vec<ToolCall>>

tool_call_id: Option<String>

Implementations

impl Message

pub fn user(content: String) -> Self

Create a user message

pub fn assistant(content: String) -> Self

Create an assistant message

pub fn assistant_with_tools(content: String, tool_calls: Vec<ToolCall>) -> Self

Create an assistant message with tool calls Based on OpenAI Cookbook patterns for function calling

pub fn system(content: String) -> Self

Create a system message

pub fn tool_response(tool_call_id: String, content: String) -> Self

Create a tool response message This follows the exact pattern from OpenAI Cookbook:

{
  "role": "tool",
  "tool_call_id": "call_123",
  "content": "Function result"
}

pub fn tool_response_with_name( tool_call_id: String, _function_name: String, content: String, ) -> Self

Create a tool response message with function name (for compatibility) Some providers might need the function name in addition to tool_call_id

pub fn validate_for_provider(&self, provider: &str) -> Result<(), String>

Validate this message for a specific provider Based on official API documentation constraints

pub fn has_tool_calls(&self) -> bool

Check if this message has tool calls

pub fn get_tool_calls(&self) -> Option<&[ToolCall]>

Get the tool calls if present

pub fn is_tool_response(&self) -> bool

Check if this is a tool response message

Trait Implementations

impl Clone for Message

fn clone(&self) -> Message

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Message

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Message

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for Message

fn eq(&self, other: &Message) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for Message

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Message