claude_codes/io/
claude_input.rs

1use serde::{Deserialize, Serialize};
2use serde_json::Value;
3use uuid::Uuid;
4
5use super::content_blocks::{ContentBlock, ImageBlock, ImageSource, TextBlock};
6use super::control::{ControlRequest, ControlResponse};
7use super::message_types::{MessageContent, UserMessage};
8
9/// Top-level enum for all possible Claude input messages
10#[derive(Debug, Clone, Serialize, Deserialize)]
11#[serde(tag = "type", rename_all = "snake_case")]
12pub enum ClaudeInput {
13    /// User message input
14    User(UserMessage),
15
16    /// Control request (for initialization handshake)
17    ControlRequest(ControlRequest),
18
19    /// Control response (for tool permission responses)
20    ControlResponse(ControlResponse),
21
22    /// Raw JSON for untyped messages
23    #[serde(untagged)]
24    Raw(Value),
25}
26
27impl ClaudeInput {
28    /// Create a simple text user message
29    pub fn user_message(text: impl Into<String>, session_id: Uuid) -> Self {
30        ClaudeInput::User(UserMessage {
31            message: MessageContent {
32                role: super::MessageRole::User,
33                content: vec![ContentBlock::Text(TextBlock {
34                    text: text.into(),
35                    citations: Vec::new(),
36                })],
37            },
38            session_id: Some(session_id),
39            parent_tool_use_id: None,
40            uuid: None,
41        })
42    }
43
44    /// Create a user message with content blocks
45    pub fn user_message_blocks(blocks: Vec<ContentBlock>, session_id: Uuid) -> Self {
46        ClaudeInput::User(UserMessage {
47            message: MessageContent {
48                role: super::MessageRole::User,
49                content: blocks,
50            },
51            session_id: Some(session_id),
52            parent_tool_use_id: None,
53            uuid: None,
54        })
55    }
56
57    /// Create an interrupt control message.
58    ///
59    /// Sends `{ "subtype": "interrupt" }` to the CLI subprocess's stdin,
60    /// telling Claude to stop its current response and return control
61    /// without killing the session.
62    pub fn interrupt() -> Self {
63        ClaudeInput::Raw(serde_json::to_value(super::SDKControlInterruptRequest::new()).unwrap())
64    }
65
66    /// Create a user message with an image and optional text
67    /// Only supports JPEG, PNG, GIF, and WebP media types
68    pub fn user_message_with_image(
69        image_data: String,
70        media_type: super::MediaType,
71        text: Option<String>,
72        session_id: Uuid,
73    ) -> Result<Self, String> {
74        // Validate media type
75        match &media_type {
76            super::MediaType::Jpeg
77            | super::MediaType::Png
78            | super::MediaType::Gif
79            | super::MediaType::Webp => {}
80            other => {
81                return Err(format!(
82                    "Invalid media type '{}'. Only JPEG, PNG, GIF, and WebP are supported.",
83                    other
84                ));
85            }
86        }
87
88        let mut blocks = vec![ContentBlock::Image(ImageBlock {
89            source: ImageSource {
90                source_type: super::ImageSourceType::Base64,
91                media_type,
92                data: image_data,
93            },
94        })];
95
96        if let Some(text_content) = text {
97            blocks.push(ContentBlock::Text(TextBlock {
98                text: text_content,
99                citations: Vec::new(),
100            }));
101        }
102
103        Ok(Self::user_message_blocks(blocks, session_id))
104    }
105}
106
107#[cfg(test)]
108mod tests {
109    use super::*;
110
111    #[test]
112    fn test_serialize_user_message() {
113        let session_uuid = Uuid::parse_str("550e8400-e29b-41d4-a716-446655440000").unwrap();
114        let input = ClaudeInput::user_message("Hello, Claude!", session_uuid);
115        let json = serde_json::to_string(&input).unwrap();
116        assert!(json.contains("\"type\":\"user\""));
117        assert!(json.contains("\"role\":\"user\""));
118        assert!(json.contains("\"text\":\"Hello, Claude!\""));
119        assert!(json.contains("550e8400-e29b-41d4-a716-446655440000"));
120    }
121}
claude_codes/io/claude_input.rs

claude_codes/io/
claude_input.rs
