editSession.ts
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// 结构化编辑会话：每个模型层持有一份 yaml Document（保留注释），编辑走「按路径改节点」，
// 只动被编辑的节点、其余原文（含注释/顺序）不变。保存时把脏层逐个 PUT 回后端。
import { parseDocument, type Document } from 'yaml'
import { api } from '../api'
export type Path = (string | number)[]
export class EditSession {
private docs = new Map<string, Document>()
dirty = new Set<string>()
/** 懒加载某层的 Document（用后端返回的源文件原文，保留注释）。 */
async ensure(code: string): Promise<Document> {
if (!this.docs.has(code)) {
const d = await api.model(code)
this.docs.set(code, parseDocument(d.raw ?? ''))
}
return this.docs.get(code)!
}
has(code: string) { return this.docs.has(code) }
toJS(code: string): any { return this.docs.get(code)?.toJS() }
setIn(code: string, path: Path, value: any) {
const doc = this.docs.get(code); if (!doc) return
doc.setIn(path, value)
this.dirty.add(code)
}
deleteIn(code: string, path: Path) {
const doc = this.docs.get(code); if (!doc) return
doc.deleteIn(path)
this.dirty.add(code)
}
/** 在某数组末尾追加一个节点。 */
addIn(code: string, arrayPath: Path, value: any) {
const doc = this.docs.get(code); if (!doc) return
doc.addIn(arrayPath, doc.createNode(value))
this.dirty.add(code)
}
/** 设置一个约束键；value 为空/假时删除该键，并在约束对象空了时删除整个 constraints。 */
setConstraint(code: string, attrPath: Path, key: string, value: any) {
const doc = this.docs.get(code); if (!doc) return
const consPath = [...attrPath, 'constraints']
if (value === undefined || value === null || value === '' || value === false) {
doc.deleteIn([...consPath, key])
const cons = doc.getIn(consPath) as any
if (cons && typeof cons.toJSON === 'function') {
const j = cons.toJSON()
if (!j || Object.keys(j).length === 0) doc.deleteIn(consPath)
}
} else {
if (doc.getIn(consPath) === undefined) doc.setIn(consPath, doc.createNode({}))
doc.setIn([...consPath, key], value)
}
this.dirty.add(code)
}
// lineWidth:0 关闭自动折行，避免把未编辑的长字符串（如 description）重新折行造成无谓 diff。
render(code: string): string { return this.docs.get(code)?.toString({ lineWidth: 0 }) ?? '' }
async saveAll(principal: string): Promise<string[]> {
const saved: string[] = []
for (const code of [...this.dirty]) {
await api.saveModel(code, this.render(code), principal)
saved.push(code)
}
this.dirty.clear()
return saved
}
reset() { this.docs.clear(); this.dirty.clear() }
}