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

claude_codes/io/
claude_input.rs
