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 { text: text.into() })],
34            },
35            session_id: Some(session_id),
36        })
37    }
38
39    /// Create a user message with content blocks
40    pub fn user_message_blocks(blocks: Vec<ContentBlock>, session_id: Uuid) -> Self {
41        ClaudeInput::User(UserMessage {
42            message: MessageContent {
43                role: super::MessageRole::User,
44                content: blocks,
45            },
46            session_id: Some(session_id),
47        })
48    }
49
50    /// Create an interrupt control message.
51    ///
52    /// Sends `{ "subtype": "interrupt" }` to the CLI subprocess's stdin,
53    /// telling Claude to stop its current response and return control
54    /// without killing the session.
55    pub fn interrupt() -> Self {
56        ClaudeInput::Raw(serde_json::to_value(super::SDKControlInterruptRequest::new()).unwrap())
57    }
58
59    /// Create a user message with an image and optional text
60    /// Only supports JPEG, PNG, GIF, and WebP media types
61    pub fn user_message_with_image(
62        image_data: String,
63        media_type: super::MediaType,
64        text: Option<String>,
65        session_id: Uuid,
66    ) -> Result<Self, String> {
67        // Validate media type
68        match &media_type {
69            super::MediaType::Jpeg
70            | super::MediaType::Png
71            | super::MediaType::Gif
72            | super::MediaType::Webp => {}
73            other => {
74                return Err(format!(
75                    "Invalid media type '{}'. Only JPEG, PNG, GIF, and WebP are supported.",
76                    other
77                ));
78            }
79        }
80
81        let mut blocks = vec![ContentBlock::Image(ImageBlock {
82            source: ImageSource {
83                source_type: super::ImageSourceType::Base64,
84                media_type,
85                data: image_data,
86            },
87        })];
88
89        if let Some(text_content) = text {
90            blocks.push(ContentBlock::Text(TextBlock { text: text_content }));
91        }
92
93        Ok(Self::user_message_blocks(blocks, session_id))
94    }
95}
96
97#[cfg(test)]
98mod tests {
99    use super::*;
100
101    #[test]
102    fn test_serialize_user_message() {
103        let session_uuid = Uuid::parse_str("550e8400-e29b-41d4-a716-446655440000").unwrap();
104        let input = ClaudeInput::user_message("Hello, Claude!", session_uuid);
105        let json = serde_json::to_string(&input).unwrap();
106        assert!(json.contains("\"type\":\"user\""));
107        assert!(json.contains("\"role\":\"user\""));
108        assert!(json.contains("\"text\":\"Hello, Claude!\""));
109        assert!(json.contains("550e8400-e29b-41d4-a716-446655440000"));
110    }
111}
claude_codes/io/claude_input.rs

claude_codes/io/
claude_input.rs
