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

claude_codes/io/
claude_input.rs
