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@ngx-formly/core

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Formly is a dynamic (JSON powered) form library for Angular that bring unmatched maintainability to your application's forms.

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import { ComponentRef } from '@angular/core'; import { getFieldId, assignFieldValue, isUndefined, getFieldValue, reverseDeepMerge, defineHiddenProp, clone, getField, markFieldForCheck, hasKey, observe, isHiddenField, isSignalRequired, } from '../../utils'; import { Subject } from 'rxjs'; export class CoreExtension { constructor(config) { this.config = config; this.formId = 0; } prePopulate(field) { const root = field.parent; this.initRootOptions(field); this.initFieldProps(field); if (root) { Object.defineProperty(field, 'options', { get: () => root.options, configurable: true }); Object.defineProperty(field, 'model', { get: () => (hasKey(field) && field.fieldGroup ? getFieldValue(field) : root.model), configurable: true, }); } Object.defineProperty(field, 'get', { value: (key) => getField(field, key), configurable: true, }); this.getFieldComponentInstance(field).prePopulate?.(field); } onPopulate(field) { this.initFieldOptions(field); this.getFieldComponentInstance(field).onPopulate?.(field); if (field.fieldGroup) { field.fieldGroup.forEach((f, index) => { if (f) { Object.defineProperty(f, 'parent', { get: () => field, configurable: true }); Object.defineProperty(f, 'index', { get: () => index, configurable: true }); } this.formId++; }); } } postPopulate(field) { this.getFieldComponentInstance(field).postPopulate?.(field); } initFieldProps(field) { field.props ??= field.templateOptions; Object.defineProperty(field, 'templateOptions', { get: () => field.props, set: (props) => (field.props = props), configurable: true, }); } initRootOptions(field) { if (field.parent) { return; } const options = field.options; field.options.formState = field.options.formState || {}; if (!options.showError) { options.showError = this.config.extras.showError; } if (!options.fieldChanges) { defineHiddenProp(options, 'fieldChanges', new Subject()); } if (!options._hiddenFieldsForCheck) { options._hiddenFieldsForCheck = []; } options._detectChanges = (f) => { if (f._componentRefs) { markFieldForCheck(f); } f.fieldGroup?.forEach((f) => f && options._detectChanges(f)); }; options.detectChanges = (f) => { f.options.checkExpressions?.(f); options._detectChanges(f); }; options.resetModel = (model) => { model = clone(model ?? options._initialModel); if (field.model) { Object.keys(field.model).forEach((k) => delete field.model[k]); Object.assign(field.model, model || {}); } if (!isSignalRequired()) { observe(options, ['parentForm', 'submitted']).setValue(false, false); } options.build(field); field.form.reset(field.model); }; options.updateInitialValue = (model) => (options._initialModel = clone(model ?? field.model)); field.options.updateInitialValue(); } initFieldOptions(field) { reverseDeepMerge(field, { id: getFieldId(`formly_${this.formId}`, field, field.index), hooks: {}, modelOptions: {}, validation: { messages: {} }, props: !field.type || !hasKey(field) ? {} : { label: '', placeholder: '', disabled: false, }, }); if (this.config.extras.resetFieldOnHide && field.resetOnHide !== false) { field.resetOnHide = true; } if (field.type !== 'formly-template' && (field.template || field.expressions?.template || field.expressionProperties?.template)) { field.type = 'formly-template'; } if (!field.type && field.fieldGroup) { field.type = 'formly-group'; } if (field.type) { this.config.getMergedField(field); } if (hasKey(field) && !isUndefined(field.defaultValue) && isUndefined(getFieldValue(field)) && !isHiddenField(field)) { assignFieldValue(field, field.defaultValue); } field.wrappers = field.wrappers || []; } getFieldComponentInstance(field) { const componentRefInstance = () => { let componentRef = this.config.resolveFieldTypeRef(field); const fieldComponentRef = field._componentRefs?.slice(-1)[0]; if (fieldComponentRef instanceof ComponentRef && fieldComponentRef?.componentType === componentRef?.componentType) { componentRef = fieldComponentRef; } return componentRef?.instance; }; if (!field._proxyInstance) { defineHiddenProp(field, '_proxyInstance', new Proxy({}, { get: (_, prop) => componentRefInstance()?.[prop], set: (_, prop, value) => (componentRefInstance()[prop] = value), })); } return field._proxyInstance; } } //# 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{ ComponentRef } from '@angular/core';\nimport { FormlyConfig } from '../../services/formly.config';\nimport { FormlyFieldConfigCache, FormlyValueChangeEvent, FormlyExtension, FormlyFieldConfig } from '../../models';\nimport {\n  getFieldId,\n  assignFieldValue,\n  isUndefined,\n  getFieldValue,\n  reverseDeepMerge,\n  defineHiddenProp,\n  clone,\n  getField,\n  markFieldForCheck,\n  hasKey,\n  observe,\n  isHiddenField,\n  isSignalRequired,\n} from '../../utils';\nimport { Subject } from 'rxjs';\n\nexport class CoreExtension implements FormlyExtension {\n  private formId = 0;\n  constructor(private config: FormlyConfig) {}\n\n  prePopulate(field: FormlyFieldConfigCache) {\n    const root = field.parent;\n    this.initRootOptions(field);\n    this.initFieldProps(field);\n    if (root) {\n      Object.defineProperty(field, 'options', { get: () => root.options, configurable: true });\n      Object.defineProperty(field, 'model', {\n        get: () => (hasKey(field) && field.fieldGroup ? getFieldValue(field) : root.model),\n        configurable: true,\n      });\n    }\n\n    Object.defineProperty(field, 'get', {\n      value: (key: FormlyFieldConfig['key']) => getField(field, key),\n      configurable: true,\n    });\n\n    this.getFieldComponentInstance(field).prePopulate?.(field);\n  }\n\n  onPopulate(field: FormlyFieldConfigCache) {\n    this.initFieldOptions(field);\n    this.getFieldComponentInstance(field).onPopulate?.(field);\n    if (field.fieldGroup) {\n      field.fieldGroup.forEach((f, index) => {\n        if (f) {\n          Object.defineProperty(f, 'parent', { get: () => field, configurable: true });\n          Object.defineProperty(f, 'index', { get: () => index, configurable: true });\n        }\n        this.formId++;\n      });\n    }\n  }\n\n  postPopulate(field: FormlyFieldConfigCache) {\n    this.getFieldComponentInstance(field).postPopulate?.(field);\n  }\n\n  private initFieldProps(field: FormlyFieldConfigCache) {\n    field.props ??= field.templateOptions;\n    Object.defineProperty(field, 'templateOptions', {\n      get: () => field.props,\n      set: (props) => (field.props = props),\n      configurable: true,\n    });\n  }\n\n  private initRootOptions(field: FormlyFieldConfigCache) {\n    if (field.parent) {\n      return;\n    }\n\n    const options = field.options;\n    field.options.formState = field.options.formState || {};\n    if (!options.showError) {\n      options.showError = this.config.extras.showError;\n    }\n\n    if (!options.fieldChanges) {\n      defineHiddenProp(options, 'fieldChanges', new Subject<FormlyValueChangeEvent>());\n    }\n\n    if (!options._hiddenFieldsForCheck) {\n      options._hiddenFieldsForCheck = [];\n    }\n\n    options._detectChanges = (f: FormlyFieldConfigCache) => {\n      if (f._componentRefs) {\n        markFieldForCheck(f);\n      }\n\n      f.fieldGroup?.forEach((f) => f && options._detectChanges(f));\n    };\n\n    options.detectChanges = (f: FormlyFieldConfigCache) => {\n      f.options.checkExpressions?.(f);\n      options._detectChanges(f);\n    };\n\n    options.resetModel = (model?: any) => {\n      model = clone(model ?? options._initialModel);\n      if (field.model) {\n        Object.keys(field.model).forEach((k) => delete field.model[k]);\n        Object.assign(field.model, model || {});\n      }\n\n      if (!isSignalRequired()) {\n        observe(options, ['parentForm', 'submitted']).setValue(false, false);\n      }\n      options.build(field);\n      field.form.reset(field.model);\n    };\n\n    options.updateInitialValue = (model?: any) => (options._initialModel = clone(model ?? field.model));\n    field.options.updateInitialValue();\n  }\n\n  private initFieldOptions(field: FormlyFieldConfigCache) {\n    reverseDeepMerge(field, {\n      id: getFieldId(`formly_${this.formId}`, field, field.index),\n      hooks: {},\n      modelOptions: {},\n      validation: { messages: {} },\n      props:\n        !field.type || !hasKey(field)\n          ? {}\n          : {\n              label: '',\n              placeholder: '',\n              disabled: false,\n            },\n    });\n\n    if (this.config.extras.resetFieldOnHide && field.resetOnHide !== false) {\n      field.resetOnHide = true;\n    }\n\n    if (\n      field.type !== 'formly-template' &&\n      (field.template || field.expressions?.template || field.expressionProperties?.template)\n    ) {\n      field.type = 'formly-template';\n    }\n\n    if (!field.type && field.fieldGroup) {\n      field.type = 'formly-group';\n    }\n\n    if (field.type) {\n      this.config.getMergedField(field);\n    }\n\n    if (\n      hasKey(field) &&\n      !isUndefined(field.defaultValue) &&\n      isUndefined(getFieldValue(field)) &&\n      !isHiddenField(field)\n    ) {\n      assignFieldValue(field, field.defaultValue);\n    }\n\n    field.wrappers = field.wrappers || [];\n  }\n\n  private getFieldComponentInstance(field: FormlyFieldConfigCache) {\n    const componentRefInstance = () => {\n      let componentRef = this.config.resolveFieldTypeRef(field);\n\n      const fieldComponentRef = field._componentRefs?.slice(-1)[0];\n      if (\n        fieldComponentRef instanceof ComponentRef &&\n        fieldComponentRef?.componentType === componentRef?.componentType\n      ) {\n        componentRef = fieldComponentRef as any;\n      }\n\n      return componentRef?.instance as any;\n    };\n\n    if (!field._proxyInstance) {\n      defineHiddenProp(\n        field,\n        '_proxyInstance',\n        new Proxy({} as FormlyExtension, {\n          get: (_, prop) => componentRefInstance()?.[prop],\n          set: (_, prop, value) => (componentRefInstance()[prop] = value),\n        }),\n      );\n    }\n\n    return field._proxyInstance;\n  }\n}\n"]}