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            timestamp: None,
42            tool_use_result: None,
43        })
44    }
45
46    /// Create a user message with content blocks
47    pub fn user_message_blocks(blocks: Vec<ContentBlock>, session_id: Uuid) -> Self {
48        ClaudeInput::User(UserMessage {
49            message: MessageContent {
50                role: super::MessageRole::User,
51                content: blocks,
52            },
53            session_id: Some(session_id),
54            parent_tool_use_id: None,
55            uuid: None,
56            timestamp: None,
57            tool_use_result: None,
58        })
59    }
60
61    /// Create an interrupt control message.
62    ///
63    /// Sends `{ "subtype": "interrupt" }` to the CLI subprocess's stdin,
64    /// telling Claude to stop its current response and return control
65    /// without killing the session.
66    pub fn interrupt() -> Self {
67        ClaudeInput::Raw(serde_json::to_value(super::SDKControlInterruptRequest::new()).unwrap())
68    }
69
70    /// Create a user message with an image and optional text
71    /// Only supports JPEG, PNG, GIF, and WebP media types
72    pub fn user_message_with_image(
73        image_data: String,
74        media_type: super::MediaType,
75        text: Option<String>,
76        session_id: Uuid,
77    ) -> Result<Self, String> {
78        // Validate media type
79        match &media_type {
80            super::MediaType::Jpeg
81            | super::MediaType::Png
82            | super::MediaType::Gif
83            | super::MediaType::Webp => {}
84            other => {
85                return Err(format!(
86                    "Invalid media type '{}'. Only JPEG, PNG, GIF, and WebP are supported.",
87                    other
88                ));
89            }
90        }
91
92        let mut blocks = vec![ContentBlock::Image(ImageBlock {
93            source: ImageSource {
94                source_type: super::ImageSourceType::Base64,
95                media_type,
96                data: image_data,
97            },
98        })];
99
100        if let Some(text_content) = text {
101            blocks.push(ContentBlock::Text(TextBlock {
102                text: text_content,
103                citations: Vec::new(),
104            }));
105        }
106
107        Ok(Self::user_message_blocks(blocks, session_id))
108    }
109}
110
111#[cfg(test)]
112mod tests {
113    use super::*;
114
115    #[test]
116    fn test_serialize_user_message() {
117        let session_uuid = Uuid::parse_str("550e8400-e29b-41d4-a716-446655440000").unwrap();
118        let input = ClaudeInput::user_message("Hello, Claude!", session_uuid);
119        let json = serde_json::to_string(&input).unwrap();
120        assert!(json.contains("\"type\":\"user\""));
121        assert!(json.contains("\"role\":\"user\""));
122        assert!(json.contains("\"text\":\"Hello, Claude!\""));
123        assert!(json.contains("550e8400-e29b-41d4-a716-446655440000"));
124    }
125}
claude_codes/io/claude_input.rs

claude_codes/io/
claude_input.rs
