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美国版/Food Labeling Management App UniApp/src/utils/labelPreview/normalizePreviewTemplate.ts 25.3 KB
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  import type { SystemLabelTemplate, SystemTemplateElementBase } from '../print/types/printer'
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  import {
    applyLiveDateTimeFieldsToTemplate,
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    captureDateDisplayFormatInConfig,
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    isUniAppDateTimeOffsetField,
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    parseStoredPrintInputOffset,
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    resolveTemplateDefaultValueForElement,
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    sanitizeDateElementConfig,
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    tryParsePrintInputOffsetStored,
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  } from './printInputOffset'
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  import {
    applyNutritionDefaultJsonToConfig,
    collectNutritionManualFromDefaults,
    hydrateNutritionElementsInTemplate,
    expandNutritionElementsToFitContent,
  } from './nutritionDefaultsMerge'
  
  export { expandNutritionElementsToFitContent, reflowElementsBelowNutritionPanel }
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  function asRecord(v: unknown): Record<string, unknown> {
    if (v != null && typeof v === 'object' && !Array.isArray(v)) return v as Record<string, unknown>
    return {}
  }
  
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  const KNOWN_ELEMENT_TYPES = new Set([
    'TEXT_STATIC',
    'TEXT',
    'TEXT_PRODUCT',
    'TEXT_PRICE',
    'TEXT_CATEGORY',
    'TEXT_LABEL_ID',
    'BARCODE',
    'QRCODE',
    'IMAGE',
    'LOGO',
    'DATE',
    'TIME',
    'DURATION',
    'WEIGHT',
    'NUTRITION',
  ])
  
  /** 与 Web canonicalElementType 对齐:print|Number → TEXT_STATIC 等 */
  function canonicalElementType (raw: string): string {
    const type = String(raw ?? '').trim()
    if (!type) return 'TEXT_STATIC'
    const upper = type.toUpperCase()
    if (KNOWN_ELEMENT_TYPES.has(upper)) return upper
    const m = type.match(/^([^|]+)\|(.+)$/i)
    if (!m) return 'TEXT_STATIC'
    const group = m[1].trim().toLowerCase()
    const label = m[2].trim().toLowerCase()
    if (group === 'print') {
      if (label === 'number' || label === 'text' || label === 'multiple options') return 'TEXT_STATIC'
      if (label === 'weight') return 'WEIGHT'
      if (label === 'date & time' || label === 'date and time') return 'DATE'
    }
    if (group === 'auto') {
      if (label.includes('current date')) return 'DATE'
      if (label.includes('current time')) return 'TIME'
    }
    if (group === 'label' && label.includes('duration') && !label.includes('date')) return 'DURATION'
    return 'TEXT_STATIC'
  }
  
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  function normalizeConfig(raw: unknown): Record<string, unknown> {
    if (raw == null) return {}
    if (typeof raw === 'string') {
      const t = raw.trim()
      if (!t) return {}
      try {
        const parsed = JSON.parse(t) as unknown
        if (parsed != null && typeof parsed === 'object' && !Array.isArray(parsed)) {
          return { ...(parsed as Record<string, unknown>) }
        }
      } catch {
        return {}
      }
      return {}
    }
    const o = asRecord(raw)
    return { ...o }
  }
  
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  /**
   * 落库/列表返回的 element 可能把 text、src、fontSize 等摊在根上,仅 `config` 为空或不全;
   * 合并进 config 后打印与预览才能读到样式与图片地址。
   */
  function mergeFlatElementFieldsIntoConfig(
    e: Record<string, unknown>,
    cfg: Record<string, unknown>,
  ): Record<string, unknown> {
    const out = { ...cfg }
    const keys = [
      'text',
      'Text',
      'prefix',
      'Prefix',
      'suffix',
      'Suffix',
      'fontSize',
      'FontSize',
      'textAlign',
      'TextAlign',
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      'verticalAlign',
      'VerticalAlign',
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      'fontFamily',
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      'FontFamily',
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      'fontWeight',
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      'FontWeight',
      'fontStyle',
      'FontStyle',
      'textDecoration',
      'TextDecoration',
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      'color',
      'Color',
      'src',
      'Src',
      'url',
      'Url',
      'data',
      'Data',
      'value',
      'Value',
      'unit',
      'Unit',
      'format',
      'Format',
      'decimal',
      'Decimal',
      'inputType',
      'InputType',
      'offsetDays',
      'OffsetDays',
      'multipleOptionId',
      'MultipleOptionId',
      'multipleOptionName',
      'MultipleOptionName',
      'selectedOptionValues',
      'SelectedOptionValues',
      'errorLevel',
      'scaleMode',
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      'weightInputMode',
      'WeightInputMode',
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      'showText',
      'placeholder',
      'Placeholder',
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      'invertColors',
      'InvertColors',
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    ] as const
    for (const k of keys) {
      const existing = out[k]
      const has =
        existing !== undefined &&
        existing !== null &&
        !(typeof existing === 'string' && String(existing).trim() === '')
      if (has) continue
      const v = e[k]
      if (v !== undefined && v !== null && !(typeof v === 'string' && String(v).trim() === '')) {
        out[k] = v as unknown
      }
    }
    return out
  }
  
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  const TEXT_PRODUCT_PLACEHOLDERS = new Set(['', '文本', 'text', 'Text', 'TEXT', 'Label', 'label'])
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  const LABEL_NAME_PLACEHOLDERS = new Set([
    ...TEXT_PRODUCT_PLACEHOLDERS,
    'Label Name',
    'label name',
    'labelname',
    'Product name',
    'product name',
  ])
  
  function normalizeLabelPanelTypeAdd(el: SystemTemplateElementBase): string {
    const raw = String(
      (el as { typeAdd?: string }).typeAdd ??
        (el.config as Record<string, unknown>)?.typeAdd ??
        (el.config as Record<string, unknown>)?.TypeAdd ??
        '',
    )
      .trim()
      .toLowerCase()
      .replace(/\s+/g, ' ')
    return raw
  }
  
  /** Label 面板 **Label Name**(typeAdd 如 label_Label Name) */
  export function isTemplateLabelNameElement(el: SystemTemplateElementBase): boolean {
    if (normalizeLabelPanelTypeAdd(el) === 'label_label name') return true
    const en = String(el.elementName ?? '').trim().toLowerCase()
    return en === 'label name' || en === 'labelname'
  }
  
  /** Label 面板 **Label Type**(typeAdd 如 label_Label Type) */
  export function isTemplateLabelTypeElement(el: SystemTemplateElementBase): boolean {
    if (normalizeLabelPanelTypeAdd(el) === 'label_label type') return true
    const en = String(el.elementName ?? '').trim().toLowerCase()
    return en === 'label type' || en === 'labeltype'
  }
  
  /**
   * 将 Label Name / Label Type 绑定写入模板(与 Web mergeLabelBindingsIntoTextValues 对齐)。
   */
  export function applyLabelBindingsToPreviewTemplate(
    template: SystemLabelTemplate,
    bindings: { labelName?: string; labelTypeName?: string; productName?: string },
  ): SystemLabelTemplate {
    const labelName = String(bindings.labelName ?? '').trim()
    const labelTypeName = String(bindings.labelTypeName ?? '').trim()
    const productName = String(bindings.productName ?? '').trim()
    const resolvedLabelName = labelName || productName
    if (!resolvedLabelName && !labelTypeName) return template
  
    const elements = (template.elements || []).map((el) => {
      const type = String(el.type || '').toUpperCase()
      const cfg = { ...(el.config || {}) } as Record<string, unknown>
      const raw = String(cfg.text ?? cfg.Text ?? '').trim()
  
      if (resolvedLabelName && isTemplateLabelNameElement(el)) {
        if (!raw || LABEL_NAME_PLACEHOLDERS.has(raw)) {
          return { ...el, config: { ...cfg, text: resolvedLabelName, Text: resolvedLabelName } }
        }
      }
      if (labelTypeName && isTemplateLabelTypeElement(el)) {
        return { ...el, config: { ...cfg, text: labelTypeName, Text: labelTypeName } }
      }
      if (resolvedLabelName && type === 'TEXT_PRODUCT' && (!raw || TEXT_PRODUCT_PLACEHOLDERS.has(raw))) {
        return { ...el, config: { ...cfg, text: resolvedLabelName, Text: resolvedLabelName } }
      }
      return el
    })
    return { ...template, elements }
  }
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  /**
   * Web 端设计器里 TEXT_PRODUCT 若为 FIXED 且占位「文本」,预览页用当前商品名覆盖(与列表传入的 productName 一致)。
   */
  export function overlayProductNameOnPreviewTemplate(
    template: SystemLabelTemplate,
    productName: string | undefined
  ): SystemLabelTemplate {
    const name = (productName ?? '').trim()
    if (!name) return template
    const elements = (template.elements || []).map((el) => {
      const type = String(el.type || '').toUpperCase()
      if (type !== 'TEXT_PRODUCT') return el
      const raw = String((el.config as any)?.text ?? (el.config as any)?.Text ?? '').trim()
      if (raw && !TEXT_PRODUCT_PLACEHOLDERS.has(raw)) return el
      return {
        ...el,
        config: { ...(el.config || {}), text: name },
      }
    })
    return { ...template, elements }
  }
  
  /**
   * 解析接口 `labelSizeText`(如 `2"x2"`、`6.00x4.00cm`、`2.00*2.00"`)。
   * 无单位后缀时默认 **inch**(与历史 `2"x2"` 一致)。
   */
  export function parseLabelSizeText(
    raw: string | null | undefined
  ): { width: number; height: number; unit: 'inch' | 'mm' | 'cm' | 'px' } | null {
    if (raw == null) return null
    let s = String(raw).trim()
    if (!s) return null
    s = s.replace(/["'\u201C\u201D\u2018\u2019\u2032\u2033]/g, '').replace(/\s+/g, '').toLowerCase()
    const m = s.match(/^(\d+(?:\.\d+)?)[*×x](\d+(?:\.\d+)?)(mm|cm|inch|in|px)?$/i)
    if (!m) return null
    const w = Number(m[1])
    const h = Number(m[2])
    if (!Number.isFinite(w) || !Number.isFinite(h) || w <= 0 || h <= 0) return null
    const suf = (m[3] || '').toLowerCase()
    let unit: 'inch' | 'mm' | 'cm' | 'px' = 'inch'
    if (suf === 'mm') unit = 'mm'
    else if (suf === 'cm') unit = 'cm'
    else if (suf === 'px') unit = 'px'
    else if (suf === 'in' || suf === 'inch') unit = 'inch'
    return { width: w, height: h, unit }
  }
  
  /**
   * 用 `labelSizeText` 覆盖模板物理宽高(解析失败则保持原模板)。
   * 注意:App 预览画布应以接口 **template.width / height / unit** 为准(见 preview 页),勿与本函数同时叠加强制覆盖。
   */
  export function applyLabelSizeTextToTemplate(
    template: SystemLabelTemplate,
    labelSizeText: string | null | undefined
  ): SystemLabelTemplate {
    const parsed = parseLabelSizeText(labelSizeText)
    if (!parsed) return template
    return {
      ...template,
      unit: parsed.unit,
      width: parsed.width,
      height: parsed.height,
    }
  }
  
  /**
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   * 将接口/缓存中的默认值统一为字符串(兼容 object、双重 JSON 编码、PascalCase unit/value)。
   */
  export function coerceTemplateProductDefaultValueToString(v: unknown): string {
    if (v == null) return ''
    if (typeof v === 'string') {
      const t = v.trim()
      if (!t) return ''
      if (t.startsWith('{') || t.startsWith('[')) return t
      if (t.startsWith('"') && t.endsWith('"')) {
        try {
          const inner = JSON.parse(t) as unknown
          if (typeof inner === 'string') return inner.trim()
        } catch {
          /* ignore */
        }
      }
      return t
    }
    if (typeof v === 'number' || typeof v === 'boolean') return String(v)
    if (typeof v === 'object' && !Array.isArray(v)) {
      const rec = v as Record<string, unknown>
      const unit = rec.unit ?? rec.Unit
      const value = rec.value ?? rec.Value
      if (unit != null && value != null) {
        return JSON.stringify({ unit: String(unit), value: String(value) })
      }
    }
    try {
      return JSON.stringify(v)
    } catch {
      return String(v)
    }
  }
  
  /**
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   * 从预览接口响应中取出 `templateProductDefaultValues`(elementId → 字符串,兼容 PascalCase / 嵌套 data)。
   */
  export function extractTemplateProductDefaultValuesFromPreviewPayload(payload: unknown): Record<string, string> {
    const tryLayer = (layer: unknown): Record<string, string> | null => {
      if (layer == null || typeof layer !== 'object' || Array.isArray(layer)) return null
      const L = layer as Record<string, unknown>
      const raw = L.templateProductDefaultValues ?? L.TemplateProductDefaultValues
      if (raw == null || typeof raw !== 'object' || Array.isArray(raw)) return null
      const out: Record<string, string> = {}
      for (const [k, v] of Object.entries(raw as Record<string, unknown>)) {
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        const key = String(k).trim()
        if (!key) continue
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        out[key] = coerceTemplateProductDefaultValueToString(v)
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      }
      return Object.keys(out).length ? out : null
    }
  
    const unwrapTemplateNode = (raw: unknown): Record<string, unknown> | null => {
      if (raw == null) return null
      if (typeof raw === 'string') {
        const s = raw.trim()
        if (!s) return null
        try {
          const p = JSON.parse(s) as unknown
          if (p != null && typeof p === 'object' && !Array.isArray(p)) return p as Record<string, unknown>
        } catch {
          return null
        }
        return null
      }
      if (typeof raw === 'object' && !Array.isArray(raw)) return raw as Record<string, unknown>
      return null
    }
  
    /** 多来源合并:后者覆盖前者,便于「嵌套在 template 内」与「与 template 平级」同时存在时取全。 */
    const mergeMaps = (...maps: (Record<string, string> | null | undefined)[]): Record<string, string> => {
      const out: Record<string, string> = {}
      for (const m of maps) {
        if (!m) continue
        for (const [k, v] of Object.entries(m)) {
          const key = String(k).trim()
          if (!key) continue
          out[key] = v
        }
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      }
      return out
    }
  
    if (payload == null || typeof payload !== 'object') return {}
    const r = payload as Record<string, unknown>
    const nested = r.data ?? r.Data
    const inner =
      nested != null && typeof nested === 'object' && !Array.isArray(nested)
        ? (nested as Record<string, unknown>)
        : null
  
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    const innerTpl = inner ? unwrapTemplateNode(inner.template ?? inner.Template) : null
    const rootTpl = unwrapTemplateNode(r.template ?? r.Template)
  
    return mergeMaps(
      innerTpl ? tryLayer(innerTpl) : null,
      rootTpl ? tryLayer(rootTpl) : null,
      inner ? tryLayer(inner) : null,
      tryLayer(r),
      tryLayer(payload),
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      tryExtractFromTemplateProductDefaultsArray(r),
      inner ? tryExtractFromTemplateProductDefaultsArray(inner) : null,
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    )
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  }
  
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  /** Web 模板 DTO 的 templateProductDefaults 数组 → 扁平 elementId → value */
  function tryExtractFromTemplateProductDefaultsArray(layer: unknown): Record<string, string> | null {
    if (layer == null || typeof layer !== 'object' || Array.isArray(layer)) return null
    const L = layer as Record<string, unknown>
    const raw = L.templateProductDefaults ?? L.TemplateProductDefaults
    if (!Array.isArray(raw)) return null
    const out: Record<string, string> = {}
    for (const row of raw) {
      if (row == null || typeof row !== 'object' || Array.isArray(row)) continue
      const rec = row as Record<string, unknown>
      const dv = rec.defaultValues ?? rec.DefaultValues
      if (dv == null || typeof dv !== 'object' || Array.isArray(dv)) continue
      for (const [k, v] of Object.entries(dv as Record<string, unknown>)) {
        const key = String(k).trim()
        if (!key) continue
        out[key] = coerceTemplateProductDefaultValueToString(v)
      }
    }
    return Object.keys(out).length ? out : null
  }
  
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  function isTemplateSectionScanElement(el: SystemTemplateElementBase): boolean {
    const cfg = el.config || {}
    const typeAdd = String(
      (el as { typeAdd?: string }).typeAdd ??
      cfg.typeAdd ??
      cfg.TypeAdd ??
      el.type ??
      '',
    )
      .trim()
      .toLowerCase()
    if (!typeAdd.startsWith('template_')) return false
    const t = String(el.type || '').toUpperCase()
    return t === 'BARCODE' || t === 'QRCODE'
  }
  
  /** 预览/打印接口响应中的产品 codeValue(兼容 PascalCase / data 嵌套) */
  export function extractProductCodeValueFromPreviewPayload(payload: unknown): string {
    const readLayer = (layer: Record<string, unknown> | null | undefined): string => {
      if (!layer) return ''
      const cv =
        layer.codeValue ??
        layer.CodeValue ??
        layer.productCodeValue ??
        layer.ProductCodeValue
      if (cv != null && String(cv).trim()) return String(cv).trim()
      const prod = layer.product ?? layer.Product
      if (prod != null && typeof prod === 'object' && !Array.isArray(prod)) {
        const p = prod as Record<string, unknown>
        const nested = p.codeValue ?? p.CodeValue
        if (nested != null && String(nested).trim()) return String(nested).trim()
      }
      return ''
    }
    if (payload == null || typeof payload !== 'object') return ''
    const r = payload as Record<string, unknown>
    const nested = r.data ?? r.Data
    const inner =
      nested != null && typeof nested === 'object' && !Array.isArray(nested)
        ? (nested as Record<string, unknown>)
        : null
    return (
      readLayer(inner) ||
      readLayer(r) ||
      ''
    )
  }
  
  /** 将产品 codeValue 写入 Template 分组下的 BARCODE / QRCODE(覆盖模板内静态 data) */
  export function applyProductCodeValueToTemplateScanElements(
    template: SystemLabelTemplate,
    codeValue: string | null | undefined,
  ): SystemLabelTemplate {
    const cv = String(codeValue ?? '').trim()
    if (!cv) return template
    const elements = (template.elements || []).map((el) => {
      if (!isTemplateSectionScanElement(el)) return el
      const cfg = { ...(el.config || {}) } as Record<string, unknown>
      cfg.data = cv
      cfg.Data = cv
      if (String(el.type || '').toUpperCase() === 'BARCODE') {
        cfg.barcodeData = cv
        cfg.BarcodeData = cv
        cfg.value = cv
        cfg.Value = cv
        cfg.content = cv
        cfg.Content = cv
      }
      return { ...el, config: cfg }
    })
    return { ...template, elements }
  }
  
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  /**
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   * 从 templateProductDefaultValues 按 id / inputKey / elementName 匹配(大小写不敏感兜底)。
   */
  export function lookupTemplateProductDefaultValue(
    el: SystemTemplateElementBase,
    defaults: Record<string, string>,
  ): string | undefined {
    const candidates = [
      String(el.id ?? '').trim(),
      String(el.inputKey ?? '').trim(),
      String(el.elementName ?? '').trim(),
    ].filter(Boolean)
    for (const k of candidates) {
      if (Object.prototype.hasOwnProperty.call(defaults, k)) return defaults[k]
    }
    const lowerEntries = Object.entries(defaults).map(([k, v]) => [k.toLowerCase(), v] as const)
    for (const k of candidates) {
      const lk = k.toLowerCase()
      const hit = lowerEntries.find(([dk]) => dk === lk)
      if (hit) return hit[1]
    }
    return undefined
  }
  
  /**
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   * 将平台录入的默认值合并进模板元素 config,供画布预览(键与 elements[].id 一致)。
   */
  export function applyTemplateProductDefaultValuesToTemplate(
    template: SystemLabelTemplate,
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    defaults: Record<string, string>,
    base: Date = new Date(),
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  ): SystemLabelTemplate {
    const keys = Object.keys(defaults)
    if (!keys.length) return template
    const elements = (template.elements || []).map((el) => {
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      const v = lookupTemplateProductDefaultValue(el, defaults)
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      if (v === undefined) return el
      const type = String(el.type || '').toUpperCase()
      const cfg = { ...(el.config || {}) } as Record<string, any>
  
      if (type === 'IMAGE' || type === 'LOGO') {
        cfg.src = v
        cfg.url = v
        cfg.Src = v
        cfg.Url = v
        return { ...el, config: cfg }
      }
      if (type === 'BARCODE' || type === 'QRCODE') {
        cfg.data = v
        cfg.Data = v
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        if (type === 'BARCODE') {
          cfg.barcodeData = v
          cfg.BarcodeData = v
          cfg.value = v
          cfg.Value = v
          cfg.content = v
          cfg.Content = v
        }
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        return { ...el, config: cfg }
      }
      if (type === 'WEIGHT') {
        cfg.value = v
        cfg.Value = v
        cfg.text = v
        cfg.Text = v
        return { ...el, config: cfg }
      }
  
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      if (type === 'DATE' || type === 'TIME' || type === 'DURATION') {
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        captureDateDisplayFormatInConfig(cfg)
        sanitizeDateElementConfig(el, cfg)
        /** 偏移类字段只保留 JSON / 纯数字,展示由 applyLiveDateTimeFieldsToTemplate 按 format 重算 */
        if (isUniAppDateTimeOffsetField(el)) {
          const trimmed = String(v).trim()
          if (parseStoredPrintInputOffset(trimmed) || /^\d+$/.test(trimmed)) {
            cfg.text = trimmed
            cfg.Text = trimmed
          }
          return { ...el, config: cfg }
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        }
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        const text = resolveTemplateDefaultValueForElement(el, v, base)
        cfg.text = text
        cfg.Text = text
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        return { ...el, config: cfg }
      }
  
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      if (type === 'NUTRITION') {
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        const manual = collectNutritionManualFromDefaults(el, defaults)
        if (Object.keys(manual).some((k) => String(manual[k] ?? '').trim() !== '')) {
          const merged = applyNutritionDefaultJsonToConfig(cfg, JSON.stringify(manual))
          return { ...el, config: merged }
        }
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        const s = String(v).trim()
        if (s.startsWith('{')) {
          const merged = applyNutritionDefaultJsonToConfig(cfg, s)
          return { ...el, config: merged }
        }
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        return el
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      }
  
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      cfg.text = v
      cfg.Text = v
      return { ...el, config: cfg }
    })
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    return hydrateNutritionElementsInTemplate(
      applyLiveDateTimeFieldsToTemplate({ ...template, elements }, base),
      defaults,
    )
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  }
  
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  function elementArrayLength (o: Record<string, unknown>): number {
    const a = o.elements ?? o.Elements
    return Array.isArray(a) ? a.length : 0
  }
  
  /**
   * 列表 `renderTemplateJson` / 接口 9 落库可能是:① 根上直接 elements;② 包在 `printInputJson`;③ 包在 `template`(对象或 JSON 字符串);
   * ④ 根上既有 `template: {}` 又有 `elements` 时,**不能**误用空 template 丢掉根级 elements(会导致重打无字、无图)。
   */
  function pickTemplateRootRecord (payload: Record<string, unknown>): Record<string, unknown> {
    const unwrapTemplateKey = (raw: unknown): Record<string, unknown> | null => {
      if (raw == null) return null
      if (typeof raw === 'string') {
        const s = raw.trim()
        if (!s) return null
        try {
          const p = JSON.parse(s) as unknown
          if (p != null && typeof p === 'object' && !Array.isArray(p)) return p as Record<string, unknown>
        } catch {
          return null
        }
        return null
      }
      if (typeof raw === 'object' && !Array.isArray(raw)) return raw as Record<string, unknown>
      return null
    }
  
    if (elementArrayLength(payload) > 0) return payload
  
    const pi = payload.printInputJson ?? payload.PrintInputJson
    if (pi != null && typeof pi === 'object' && !Array.isArray(pi)) {
      const p = pi as Record<string, unknown>
      if (elementArrayLength(p) > 0) return p
    }
  
    const nested =
      unwrapTemplateKey(payload.template ?? payload.Template) ?? asRecord(payload.template ?? payload.Template)
    if (elementArrayLength(nested) > 0) return nested
  
    if (pi != null && typeof pi === 'object' && !Array.isArray(pi)) return pi as Record<string, unknown>
    if (Object.keys(nested).length > 0) return nested
    return payload
  }
  
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  export function normalizeTemplatePrintOrientation(raw: unknown): 'horizontal' | 'vertical' {
    const v = String(raw ?? '').trim().toLowerCase()
    return v === 'horizontal' ? 'horizontal' : 'vertical'
  }
  
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  /**
   * 将接口 8.2 返回的 template(或整段 DTO)规范为 SystemLabelTemplate,供打印适配器与预览画布使用。
   */
  export function normalizeLabelTemplateFromPreviewApi(payload: unknown): SystemLabelTemplate | null {
    if (payload == null || typeof payload !== 'object') return null
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    let root = payload as Record<string, unknown>
    const wrapped = root.data ?? root.Data
    if (wrapped != null && typeof wrapped === 'object' && !Array.isArray(wrapped)) {
      root = wrapped as Record<string, unknown>
    }
    const t = pickTemplateRootRecord(root)
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    const elementsRaw = t.elements ?? t.Elements
    if (!Array.isArray(elementsRaw)) return null
  
    const elements: SystemTemplateElementBase[] = (elementsRaw as unknown[]).map((el, index) => {
      const e = asRecord(el)
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      let cfg = normalizeConfig(
        e.config ?? e.Config ?? e.ConfigJson ?? e.configJson ?? e.ConfigString,
      )
      cfg = mergeFlatElementFieldsIntoConfig(e, cfg)
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      captureDateDisplayFormatInConfig(cfg)
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      const type = canonicalElementType(String(e.type ?? e.elementType ?? e.ElementType ?? 'TEXT_STATIC'))
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      const vst = e.valueSourceType ?? e.ValueSourceType
      const ik = e.inputKey ?? e.InputKey
      const en = e.elementName ?? e.ElementName
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      const typeAddRaw = e.typeAdd ?? e.TypeAdd
      const baseEl = {
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        id: String(e.id ?? e.Id ?? `el-${index}`),
        type,
        x: Number(e.x ?? e.posX ?? e.PosX ?? 0),
        y: Number(e.y ?? e.posY ?? e.PosY ?? 0),
        width: Number(e.width ?? e.Width ?? 0),
        height: Number(e.height ?? e.Height ?? 0),
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        rotation: String(e.rotation ?? e.Rotation ?? 'horizontal') as 'horizontal' | 'vertical' | 'left' | 'right' | 'rotate180',
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        border: String(e.border ?? e.Border ?? e.BorderType ?? e.borderType ?? 'none'),
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        config: cfg as Record<string, any>,
        zIndex: Number(e.zIndex ?? e.ZIndex ?? 0),
        orderNum: Number(e.orderNum ?? e.OrderNum ?? index),
        valueSourceType: vst != null ? String(vst) : undefined,
        inputKey: ik != null && String(ik).trim() !== '' ? String(ik).trim() : undefined,
        elementName: en != null && String(en).trim() !== '' ? String(en).trim() : undefined,
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      } as SystemTemplateElementBase & { zIndex: number; orderNum: number; typeAdd?: string }
      if (typeAddRaw != null && String(typeAddRaw).trim() !== '') {
        baseEl.typeAdd = String(typeAddRaw).trim()
      }
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      sanitizeDateElementConfig(baseEl, cfg as Record<string, unknown>)
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      return baseEl
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    })
  
    const unitRaw = String(t.unit ?? t.Unit ?? 'inch').toLowerCase()
    const unit = (unitRaw === 'mm' || unitRaw === 'cm' || unitRaw === 'px' ? unitRaw : 'inch') as
      | 'inch'
      | 'mm'
      | 'cm'
      | 'px'
  
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    const tmpl: SystemLabelTemplate = {
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      id: String(t.id ?? t.Id ?? 'preview'),
      name: String(t.name ?? t.Name ?? 'Label'),
      labelType: String(t.labelType ?? t.LabelType ?? ''),
      unit,
      width: Number(t.width ?? t.Width ?? 2),
      height: Number(t.height ?? t.Height ?? 2),
      appliedLocation: String(t.appliedLocation ?? t.AppliedLocation ?? 'ALL'),
      showRuler: !!(t.showRuler ?? t.ShowRuler),
      showGrid: !!(t.showGrid ?? t.ShowGrid),
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      border: String(t.border ?? t.Border ?? t.BorderType ?? t.borderType ?? 'none'),
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      printOrientation: normalizeTemplatePrintOrientation(
        t.printOrientation ?? t.PrintOrientation,
      ),
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      elements,
    }
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    return hydrateNutritionElementsInTemplate(tmpl, {})
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  }
  
  export function sortElementsForPreview(
    elements: SystemTemplateElementBase[]
  ): SystemTemplateElementBase[] {
    return [...elements].sort((a, b) => {
      const za = Number((a as any).zIndex ?? 0)
      const zb = Number((b as any).zIndex ?? 0)
      if (za !== zb) return za - zb
      const oa = Number((a as any).orderNum ?? 0)
      const ob = Number((b as any).orderNum ?? 0)
      return oa - ob
    })
  }