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

claude_codes/io/
claude_input.rs
