jspurefix/src/dictionary/parser/fixml/fields-parser.ts

pure node js fix engine

import { ILooseObject } from '../../../collections/collection'
import { SimpleFieldDefinition, FixDefinitions } from '../../definition'
import { XsdParser } from './xsd-parser'
import { ISaxNode } from '../../sax-node'

interface ISimpleField extends ILooseObject {
  restrictionBase: string
  documentation: string
  Protocol: string
  simpleTypeName: string
  name: string
  ComponentType: string
  Tag: string
  Type: string
  AbbrName: string
  Category: string
  CategoryAbbrName: string
  enums: Map<string, string>
  currentEnum: string
}

interface IAlias {
  name: string
  mapped: string
}

export class FieldsParser extends XsdParser {
  private readonly alias: IAlias[] = []
  public constructor (public readonly definitions: FixDefinitions) {
    super(definitions)
  }

  public value (line: number, n: string, v: string): void {
    const current: ISimpleField = this.current as ISimpleField
    switch (n) {
      case 'fm:EnumDoc': {
        current.enums.set(current.currentEnum, v)
        break
      }
      case 'xs:documentation': {
        this.current.documentation = v
        break
      }
    }
  }

  public close (line: number, node: string): void {
    const current: ISimpleField = this.current as ISimpleField
    switch (node) {
      case 'xs:simpleType': {
        this.data[this.data.length] = current
        break
      }

      case 'xs:schema': {
        this.insertFields()
        break
      }
    }
  }

  public open (line: number, node: ISaxNode): void {
    switch (node.name) {
      case 'xs:simpleType': {
        this.current = {
          simpleTypeName: node.attributes.name
        } as ISimpleField
        break
      }

      case 'fm:Xref': {
        this.assign(node)
        break
      }

      case 'xs:restriction': {
        this.current.restrictionBase = node.attributes.base
        break
      }

      case 'fm:EnumDoc': {
        if (!this.current.enums) {
          this.current.enums = new Map<string, string>()
        }
        this.current.currentEnum = node.attributes.value
        this.pending = node.name
        break
      }

      default:
        this.pending = node.name
    }
  }

  private insertFields (): void {
    const alias = this.alias
    this.data.forEach((f: ISimpleField) => {
      const sf: SimpleFieldDefinition = new SimpleFieldDefinition(f.Tag,
        f.name,
        f.AbbrName,
        f.Category,
        f.CategoryAbbrName,
        f.Type,
        f.documentation)
      if (f.enums) {
        f.enums.forEach((k: string, v: string) => {
          sf.addEnum(k, v)
        })
      }
      if (f.name && f.Type && f.Tag) {
        this.definitions.addSimpleFieldDef(sf, f.simpleTypeName)
      } else if (f.restrictionBase && f.simpleTypeName) {
        let mapped = f.simpleTypeName
        if (mapped.endsWith('_t')) {
          mapped = mapped.replace(/_t$/, '')
        } else {
          mapped = f.restrictionBase
        }
        alias.push({
          name: f.simpleTypeName,
          mapped
        })
      }
    })
    alias.forEach((a: IAlias) => {
      this.definitions.addSimpleAlias(a.mapped, a.name)
    })
  }
}