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            requeue_if_interrupted_within_ms: None,
86        })
87    }
88
89    /// Create a user message with content blocks
90    pub fn user_message_blocks(blocks: Vec<ContentBlock>, session_id: Uuid) -> Self {
91        ClaudeInput::User(UserMessage {
92            message: MessageContent {
93                role: super::MessageRole::User,
94                content: blocks,
95            },
96            session_id: Some(session_id),
97            parent_tool_use_id: None,
98            uuid: None,
99            timestamp: None,
100            tool_use_result: None,
101            agent_id: None,
102            subagent_type: None,
103            task_description: None,
104            origin: None,
105            priority: None,
106            is_synthetic: None,
107            should_query: None,
108            is_meta: None,
109            is_visible_in_transcript_only: None,
110            is_virtual: None,
111            is_compact_summary: None,
112            summarize_metadata: None,
113            mcp_meta: None,
114            tool_result_meta: None,
115            source_tool_use_id: None,
116            source_tool_assistant_uuid: None,
117            image_paste_ids: None,
118            client_platform: None,
119            inbound_origin: None,
120            is_replay: None,
121            file_attachments: None,
122            seeded_summon: None,
123            client_composed: None,
124            text_not_typed: None,
125            initiator: None,
126            pasted_content: None,
127            historical: None,
128            server_received_wall_ms: None,
129            refused_message_id: None,
130            requeue_if_interrupted_within_ms: None,
131        })
132    }
133
134    /// Create an interrupt control request.
135    ///
136    /// Serializes to the `control_request` envelope the CLI requires:
137    /// `{"type":"control_request","request_id":...,"request":{"subtype":"interrupt"}}`,
138    /// telling Claude to stop its current response and return control
139    /// without killing the session. The CLI acknowledges with a
140    /// `control_response` carrying the same `request_id`.
141    ///
142    /// `request_id` must be unique per request; the clients generate
143    /// `interrupt-<uuid>` ids.
144    pub fn interrupt(request_id: impl Into<String>) -> Self {
145        ClaudeInput::ControlRequest(ControlRequest {
146            request_id: request_id.into(),
147            request: super::ControlRequestPayload::Interrupt,
148        })
149    }
150
151    /// Create a user message with an image and optional text
152    /// Only supports JPEG, PNG, GIF, and WebP media types
153    pub fn user_message_with_image(
154        image_data: String,
155        media_type: super::MediaType,
156        text: Option<String>,
157        session_id: Uuid,
158    ) -> Result<Self, String> {
159        // Validate media type
160        match &media_type {
161            super::MediaType::Jpeg
162            | super::MediaType::Png
163            | super::MediaType::Gif
164            | super::MediaType::Webp => {}
165            other => {
166                return Err(format!(
167                    "Invalid media type '{}'. Only JPEG, PNG, GIF, and WebP are supported.",
168                    other
169                ));
170            }
171        }
172
173        let mut blocks = vec![ContentBlock::Image(ImageBlock {
174            source: ImageSource {
175                source_type: super::ImageSourceType::Base64,
176                media_type,
177                data: image_data,
178            },
179        })];
180
181        if let Some(text_content) = text {
182            blocks.push(ContentBlock::Text(TextBlock {
183                text: text_content,
184                citations: Vec::new(),
185            }));
186        }
187
188        Ok(Self::user_message_blocks(blocks, session_id))
189    }
190}
191
192#[cfg(test)]
193mod tests {
194    use super::*;
195
196    #[test]
197    fn test_interrupt_serializes_to_control_request_envelope() {
198        let input = ClaudeInput::interrupt("interrupt-abc");
199        assert_eq!(
200            serde_json::to_value(&input).unwrap(),
201            serde_json::json!({
202                "type": "control_request",
203                "request_id": "interrupt-abc",
204                "request": {"subtype": "interrupt"}
205            })
206        );
207    }
208
209    #[test]
210    fn test_serialize_user_message() {
211        let session_uuid = Uuid::parse_str("550e8400-e29b-41d4-a716-446655440000").unwrap();
212        let input = ClaudeInput::user_message("Hello, Claude!", session_uuid);
213        let json = serde_json::to_string(&input).unwrap();
214        assert!(json.contains("\"type\":\"user\""));
215        assert!(json.contains("\"role\":\"user\""));
216        assert!(json.contains("\"text\":\"Hello, Claude!\""));
217        assert!(json.contains("550e8400-e29b-41d4-a716-446655440000"));
218    }
219
220    #[test]
221    fn test_serialize_user_message_without_session() {
222        let input = ClaudeInput::user_message_without_session("Hello, Claude!");
223        let json = serde_json::to_string(&input).unwrap();
224        assert!(json.contains("\"type\":\"user\""));
225        assert!(!json.contains("session_id"));
226    }
227}
claude_codes/io/claude_input.rs

claude_codes/io/
claude_input.rs
