City-Lifeline-Cockpit/.scratch/lanhu-cockpit-asset-replacement/research/extract-assets.mjs

// 导出蓝湖可下载资产到设计归档，并生成索引（命名切图 + 图片填充）
import { readFileSync, writeFileSync, readdirSync, mkdirSync } from 'node:fs'
import { join } from 'node:path'

const raw = '.scratch/lanhu-cockpit-asset-replacement/research/raw'
const outDir = '.scratch/lanhu-cockpit-asset-replacement/design-archive'
mkdirSync(outDir, { recursive: true })

const files = readdirSync(raw).filter((f) => /^desktop-\d+\.json$/.test(f)).sort()
const exportLayers = []
const imageFills = []

for (const file of files) {
    const j = JSON.parse(readFileSync(join(raw, file), 'utf8'))
    const ab = j.artboard
    function walk(node, path) {
        const p = path ? `${path}/${node.name}` : node.name
        if (node.hasExportImage) {
            exportLayers.push({ artboard: ab.name, path: p, w: Math.round(node.frame?.width ?? 0), h: Math.round(node.frame?.height ?? 0), type: node.type })
        }
        for (const f of node.style?.fills || []) {
            const url = f.ddsImage?.imageUrl || f.image?.imageUrl || f.imageUrl
            if (f.type === 'image' && url) {
                imageFills.push({ artboard: ab.name, path: p, w: Math.round(node.frame?.width ?? 0), h: Math.round(node.frame?.height ?? 0), url })
            }
        }
        for (const ch of node.layers || []) walk(ch, p)
    }
    for (const l of ab.layers || []) walk(l, '')
}

// 项目级 assets（PNG/SVG 成对）—— 与 25 个 hasExportImage 图层一一对应
const assetUrls = []
for (const file of files) {
    const j = JSON.parse(readFileSync(join(raw, file), 'utf8'))
    for (const u of j.assets || []) assetUrls.push({ artboard: j.artboard.name, url: u })
}

const index = { exportLayers, imageFills, assetUrls }
writeFileSync(join(raw, 'asset-index.json'), JSON.stringify(index, null, 1))

console.log('export-marked layers:', exportLayers.length)
for (const e of exportLayers) console.log(`  ${e.artboard} | ${e.path} | ${e.w}x${e.h} | ${e.type}`)
console.log('\nimage fills:', imageFills.length, '| unique urls:', new Set(imageFills.map((i) => i.url)).size)
for (const i of imageFills) console.log(`  ${i.artboard} | ${i.path} | ${i.w}x${i.h}`)
console.log('\nasset files:', assetUrls.length, '| unique:', new Set(assetUrls.map((a) => a.url)).size)