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import type { AgentPart as MessageAgentPart, FilePart, Part, TextPart } from "@opencode-ai/sdk/v2"
import type { AgentPart, FileAttachmentPart, ImageAttachmentPart, Prompt } from "@/context/prompt"
type Inline =
| {
type: "file"
start: number
end: number
value: string
path: string
selection?: {
startLine: number
endLine: number
startChar: number
endChar: number
}
}
| {
type: "agent"
start: number
end: number
value: string
name: string
}
function selectionFromFileUrl(url: string): Extract<Inline, { type: "file" }>["selection"] {
const queryIndex = url.indexOf("?")
if (queryIndex === -1) return undefined
const params = new URLSearchParams(url.slice(queryIndex + 1))
const startLine = Number(params.get("start"))
const endLine = Number(params.get("end"))
if (!Number.isFinite(startLine) || !Number.isFinite(endLine)) return undefined
return {
startLine,
endLine,
startChar: 0,
endChar: 0,
}
}
function textPartValue(parts: Part[]) {
const candidates = parts
.filter((part): part is TextPart => part.type === "text")
.filter((part) => !part.synthetic && !part.ignored)
return candidates.reduce((best: TextPart | undefined, part) => {
if (!best) return part
if (part.text.length > best.text.length) return part
return best
}, undefined)
}
/**
* Extract prompt content from message parts for restoring into the prompt input.
* This is used by undo to restore the original user prompt.
*/
export function extractPromptFromParts(parts: Part[], opts?: { directory?: string; attachmentName?: string }): Prompt {
const textPart = textPartValue(parts)
const text = textPart?.text ?? ""
const directory = opts?.directory
const attachmentName = opts?.attachmentName ?? "attachment"
const toRelative = (path: string) => {
if (!directory) return path
const prefix = directory.endsWith("/") ? directory : directory + "/"
if (path.startsWith(prefix)) return path.slice(prefix.length)
if (path.startsWith(directory)) {
const next = path.slice(directory.length)
if (next.startsWith("/")) return next.slice(1)
return next
}
return path
}
const inline: Inline[] = []
const images: ImageAttachmentPart[] = []
for (const part of parts) {
if (part.type === "file") {
const filePart = part as FilePart
const sourceText = filePart.source?.text
if (sourceText) {
const value = sourceText.value
const start = sourceText.start
const end = sourceText.end
let path = value
if (value.startsWith("@")) path = value.slice(1)
if (!value.startsWith("@") && filePart.source && "path" in filePart.source) {
path = filePart.source.path
}
inline.push({
type: "file",
start,
end,
value,
path: toRelative(path),
selection: selectionFromFileUrl(filePart.url),
})
continue
}
if (filePart.url.startsWith("data:")) {
images.push({
type: "image",
id: filePart.id,
filename: filePart.filename ?? attachmentName,
mime: filePart.mime,
dataUrl: filePart.url,
})
}
}
if (part.type === "agent") {
const agentPart = part as MessageAgentPart
const source = agentPart.source
if (!source) continue
inline.push({
type: "agent",
start: source.start,
end: source.end,
value: source.value,
name: agentPart.name,
})
}
}
inline.sort((a, b) => {
if (a.start !== b.start) return a.start - b.start
return a.end - b.end
})
const result: Prompt = []
let position = 0
let cursor = 0
const pushText = (content: string) => {
if (!content) return
result.push({
type: "text",
content,
start: position,
end: position + content.length,
})
position += content.length
}
const pushFile = (item: Extract<Inline, { type: "file" }>) => {
const content = item.value
const attachment: FileAttachmentPart = {
type: "file",
path: item.path,
content,
start: position,
end: position + content.length,
selection: item.selection,
}
result.push(attachment)
position += content.length
}
const pushAgent = (item: Extract<Inline, { type: "agent" }>) => {
const content = item.value
const mention: AgentPart = {
type: "agent",
name: item.name,
content,
start: position,
end: position + content.length,
}
result.push(mention)
position += content.length
}
for (const item of inline) {
if (item.start < 0 || item.end < item.start) continue
const expected = item.value
if (!expected) continue
const mismatch = item.end > text.length || item.start < cursor || text.slice(item.start, item.end) !== expected
const start = mismatch ? text.indexOf(expected, cursor) : item.start
if (start === -1) continue
const end = mismatch ? start + expected.length : item.end
pushText(text.slice(cursor, start))
if (item.type === "file") pushFile(item)
if (item.type === "agent") pushAgent(item)
cursor = end
}
pushText(text.slice(cursor))
if (result.length === 0) {
result.push({ type: "text", content: "", start: 0, end: 0 })
}
if (images.length === 0) return result
return [...result, ...images]
}
|
