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

claude_codes/io/
claude_input.rs
