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            agent_id: None,
57            subagent_type: None,
58            task_description: None,
59            origin: None,
60            priority: None,
61            is_synthetic: None,
62            should_query: None,
63            is_meta: None,
64            is_visible_in_transcript_only: None,
65            is_virtual: None,
66            is_compact_summary: None,
67            summarize_metadata: None,
68            mcp_meta: None,
69            tool_result_meta: None,
70            source_tool_use_id: None,
71            source_tool_assistant_uuid: None,
72            image_paste_ids: None,
73            client_platform: None,
74            inbound_origin: None,
75            is_replay: None,
76            file_attachments: None,
77            seeded_summon: None,
78            client_composed: None,
79            text_not_typed: None,
80            initiator: None,
81            pasted_content: None,
82            historical: None,
83            server_received_wall_ms: None,
84            refused_message_id: None,
85        })
86    }
87
88    /// Create a user message with content blocks
89    pub fn user_message_blocks(blocks: Vec<ContentBlock>, session_id: Uuid) -> Self {
90        ClaudeInput::User(UserMessage {
91            message: MessageContent {
92                role: super::MessageRole::User,
93                content: blocks,
94            },
95            session_id: Some(session_id),
96            parent_tool_use_id: None,
97            uuid: None,
98            timestamp: None,
99            tool_use_result: None,
100            agent_id: None,
101            subagent_type: None,
102            task_description: None,
103            origin: None,
104            priority: None,
105            is_synthetic: None,
106            should_query: None,
107            is_meta: None,
108            is_visible_in_transcript_only: None,
109            is_virtual: None,
110            is_compact_summary: None,
111            summarize_metadata: None,
112            mcp_meta: None,
113            tool_result_meta: None,
114            source_tool_use_id: None,
115            source_tool_assistant_uuid: None,
116            image_paste_ids: None,
117            client_platform: None,
118            inbound_origin: None,
119            is_replay: None,
120            file_attachments: None,
121            seeded_summon: None,
122            client_composed: None,
123            text_not_typed: None,
124            initiator: None,
125            pasted_content: None,
126            historical: None,
127            server_received_wall_ms: None,
128            refused_message_id: None,
129        })
130    }
131
132    /// Create an interrupt control request.
133    ///
134    /// Serializes to the `control_request` envelope the CLI requires:
135    /// `{"type":"control_request","request_id":...,"request":{"subtype":"interrupt"}}`,
136    /// telling Claude to stop its current response and return control
137    /// without killing the session. The CLI acknowledges with a
138    /// `control_response` carrying the same `request_id`.
139    ///
140    /// `request_id` must be unique per request; the clients generate
141    /// `interrupt-<uuid>` ids.
142    pub fn interrupt(request_id: impl Into<String>) -> Self {
143        ClaudeInput::ControlRequest(ControlRequest {
144            request_id: request_id.into(),
145            request: super::ControlRequestPayload::Interrupt,
146        })
147    }
148
149    /// Create a user message with an image and optional text
150    /// Only supports JPEG, PNG, GIF, and WebP media types
151    pub fn user_message_with_image(
152        image_data: String,
153        media_type: super::MediaType,
154        text: Option<String>,
155        session_id: Uuid,
156    ) -> Result<Self, String> {
157        // Validate media type
158        match &media_type {
159            super::MediaType::Jpeg
160            | super::MediaType::Png
161            | super::MediaType::Gif
162            | super::MediaType::Webp => {}
163            other => {
164                return Err(format!(
165                    "Invalid media type '{}'. Only JPEG, PNG, GIF, and WebP are supported.",
166                    other
167                ));
168            }
169        }
170
171        let mut blocks = vec![ContentBlock::Image(ImageBlock {
172            source: ImageSource {
173                source_type: super::ImageSourceType::Base64,
174                media_type,
175                data: image_data,
176            },
177        })];
178
179        if let Some(text_content) = text {
180            blocks.push(ContentBlock::Text(TextBlock {
181                text: text_content,
182                citations: Vec::new(),
183            }));
184        }
185
186        Ok(Self::user_message_blocks(blocks, session_id))
187    }
188}
189
190#[cfg(test)]
191mod tests {
192    use super::*;
193
194    #[test]
195    fn test_interrupt_serializes_to_control_request_envelope() {
196        let input = ClaudeInput::interrupt("interrupt-abc");
197        assert_eq!(
198            serde_json::to_value(&input).unwrap(),
199            serde_json::json!({
200                "type": "control_request",
201                "request_id": "interrupt-abc",
202                "request": {"subtype": "interrupt"}
203            })
204        );
205    }
206
207    #[test]
208    fn test_serialize_user_message() {
209        let session_uuid = Uuid::parse_str("550e8400-e29b-41d4-a716-446655440000").unwrap();
210        let input = ClaudeInput::user_message("Hello, Claude!", session_uuid);
211        let json = serde_json::to_string(&input).unwrap();
212        assert!(json.contains("\"type\":\"user\""));
213        assert!(json.contains("\"role\":\"user\""));
214        assert!(json.contains("\"text\":\"Hello, Claude!\""));
215        assert!(json.contains("550e8400-e29b-41d4-a716-446655440000"));
216    }
217
218    #[test]
219    fn test_serialize_user_message_without_session() {
220        let input = ClaudeInput::user_message_without_session("Hello, Claude!");
221        let json = serde_json::to_string(&input).unwrap();
222        assert!(json.contains("\"type\":\"user\""));
223        assert!(!json.contains("session_id"));
224    }
225}
claude_codes/io/claude_input.rs

claude_codes/io/
claude_input.rs
