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///
11/// Keep variants unboxed so pattern matches and constructors stay ergonomic.
12#[allow(clippy::large_enum_variant)]
13#[derive(Debug, Clone, Serialize, Deserialize)]
14#[serde(tag = "type", rename_all = "snake_case")]
15pub enum ClaudeInput {
16    /// User message input
17    User(UserMessage),
18
19    /// Control request (for initialization handshake)
20    ControlRequest(ControlRequest),
21
22    /// Control response (for tool permission responses)
23    ControlResponse(ControlResponse),
24
25    /// Raw JSON for untyped messages
26    #[serde(untagged)]
27    Raw(Value),
28}
29
30impl ClaudeInput {
31    /// Create a simple text user message
32    pub fn user_message(text: impl Into<String>, session_id: Uuid) -> Self {
33        Self::text_user_message(text, Some(session_id))
34    }
35
36    /// Create a simple text user message associated with the current CLI
37    /// process session.
38    pub fn user_message_without_session(text: impl Into<String>) -> Self {
39        Self::text_user_message(text, None)
40    }
41
42    fn text_user_message(text: impl Into<String>, session_id: Option<Uuid>) -> Self {
43        ClaudeInput::User(UserMessage {
44            message: MessageContent {
45                role: super::MessageRole::User,
46                content: vec![ContentBlock::Text(TextBlock {
47                    text: text.into(),
48                    citations: Vec::new(),
49                })],
50            },
51            session_id,
52            parent_tool_use_id: None,
53            uuid: None,
54            timestamp: None,
55            tool_use_result: None,
56            subagent_type: None,
57            task_description: None,
58            origin: None,
59            priority: None,
60            is_synthetic: None,
61            should_query: None,
62            is_meta: None,
63            is_visible_in_transcript_only: None,
64            is_virtual: None,
65            is_compact_summary: None,
66            summarize_metadata: None,
67            mcp_meta: None,
68            tool_result_meta: None,
69            source_tool_use_id: None,
70            source_tool_assistant_uuid: None,
71            image_paste_ids: None,
72            client_platform: None,
73            inbound_origin: None,
74            is_replay: None,
75            file_attachments: None,
76            seeded_summon: None,
77        })
78    }
79
80    /// Create a user message with content blocks
81    pub fn user_message_blocks(blocks: Vec<ContentBlock>, session_id: Uuid) -> Self {
82        ClaudeInput::User(UserMessage {
83            message: MessageContent {
84                role: super::MessageRole::User,
85                content: blocks,
86            },
87            session_id: Some(session_id),
88            parent_tool_use_id: None,
89            uuid: None,
90            timestamp: None,
91            tool_use_result: None,
92            subagent_type: None,
93            task_description: None,
94            origin: None,
95            priority: None,
96            is_synthetic: None,
97            should_query: None,
98            is_meta: None,
99            is_visible_in_transcript_only: None,
100            is_virtual: None,
101            is_compact_summary: None,
102            summarize_metadata: None,
103            mcp_meta: None,
104            tool_result_meta: None,
105            source_tool_use_id: None,
106            source_tool_assistant_uuid: None,
107            image_paste_ids: None,
108            client_platform: None,
109            inbound_origin: None,
110            is_replay: None,
111            file_attachments: None,
112            seeded_summon: None,
113        })
114    }
115
116    /// Create an interrupt control request.
117    ///
118    /// Serializes to the `control_request` envelope the CLI requires:
119    /// `{"type":"control_request","request_id":...,"request":{"subtype":"interrupt"}}`,
120    /// telling Claude to stop its current response and return control
121    /// without killing the session. The CLI acknowledges with a
122    /// `control_response` carrying the same `request_id`.
123    ///
124    /// `request_id` must be unique per request; the clients generate
125    /// `interrupt-<uuid>` ids.
126    pub fn interrupt(request_id: impl Into<String>) -> Self {
127        ClaudeInput::ControlRequest(ControlRequest {
128            request_id: request_id.into(),
129            request: super::ControlRequestPayload::Interrupt,
130        })
131    }
132
133    /// Create a user message with an image and optional text
134    /// Only supports JPEG, PNG, GIF, and WebP media types
135    pub fn user_message_with_image(
136        image_data: String,
137        media_type: super::MediaType,
138        text: Option<String>,
139        session_id: Uuid,
140    ) -> Result<Self, String> {
141        // Validate media type
142        match &media_type {
143            super::MediaType::Jpeg
144            | super::MediaType::Png
145            | super::MediaType::Gif
146            | super::MediaType::Webp => {}
147            other => {
148                return Err(format!(
149                    "Invalid media type '{}'. Only JPEG, PNG, GIF, and WebP are supported.",
150                    other
151                ));
152            }
153        }
154
155        let mut blocks = vec![ContentBlock::Image(ImageBlock {
156            source: ImageSource {
157                source_type: super::ImageSourceType::Base64,
158                media_type,
159                data: image_data,
160            },
161        })];
162
163        if let Some(text_content) = text {
164            blocks.push(ContentBlock::Text(TextBlock {
165                text: text_content,
166                citations: Vec::new(),
167            }));
168        }
169
170        Ok(Self::user_message_blocks(blocks, session_id))
171    }
172}
173
174#[cfg(test)]
175mod tests {
176    use super::*;
177
178    #[test]
179    fn test_interrupt_serializes_to_control_request_envelope() {
180        let input = ClaudeInput::interrupt("interrupt-abc");
181        assert_eq!(
182            serde_json::to_value(&input).unwrap(),
183            serde_json::json!({
184                "type": "control_request",
185                "request_id": "interrupt-abc",
186                "request": {"subtype": "interrupt"}
187            })
188        );
189    }
190
191    #[test]
192    fn test_serialize_user_message() {
193        let session_uuid = Uuid::parse_str("550e8400-e29b-41d4-a716-446655440000").unwrap();
194        let input = ClaudeInput::user_message("Hello, Claude!", session_uuid);
195        let json = serde_json::to_string(&input).unwrap();
196        assert!(json.contains("\"type\":\"user\""));
197        assert!(json.contains("\"role\":\"user\""));
198        assert!(json.contains("\"text\":\"Hello, Claude!\""));
199        assert!(json.contains("550e8400-e29b-41d4-a716-446655440000"));
200    }
201
202    #[test]
203    fn test_serialize_user_message_without_session() {
204        let input = ClaudeInput::user_message_without_session("Hello, Claude!");
205        let json = serde_json::to_string(&input).unwrap();
206        assert!(json.contains("\"type\":\"user\""));
207        assert!(!json.contains("session_id"));
208    }
209}
claude_codes/io/claude_input.rs

claude_codes/io/
claude_input.rs
