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

claude_codes/io/
claude_input.rs
