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import { MAX_PROJECT_JSON_BYTES, parseVisualProject } from './project-format.mjs'
export function projectUrlFromSearch(search, pageUrl) {
const value = new URLSearchParams(String(search ?? '')).get('project')
if (!value) return null
const base = new URL(pageUrl)
const projectUrl = new URL(value, base)
if (projectUrl.origin !== base.origin) throw new TypeError('別のサイトにあるプロジェクトは開けません')
if (!projectUrl.pathname.endsWith('.stackchan-blocks.json')) {
throw new TypeError('ブロックプロジェクトのURLではありません')
}
return projectUrl
}
export async function fetchExternalProject(projectUrl, fetcher = globalThis.fetch) {
const response = await fetcher(projectUrl)
if (!response.ok) throw new Error(`プロジェクトを取得できませんでした (${response.status})`)
const declaredSize = Number(response.headers?.get?.('content-length'))
if (Number.isFinite(declaredSize) && declaredSize > MAX_PROJECT_JSON_BYTES) {
throw new TypeError(`プロジェクトが上限 ${MAX_PROJECT_JSON_BYTES} バイトを超えています`)
}
return parseVisualProject(await response.text())
}