fix-client/src/lib/fields/Fields.js

A minimalist FIX API client

const { FIELDS } = require('../spec/SpecFields')
const { Messages } = require('../messages/Messages')
const { Categories } = require('./categories/Categories')
const { DataTypes } = require('./datatypes/Datatypes')
const { Sections } = require('./sections/Sections')

class Fields {
    constructor() {
        this.fields = FIELDS;
        this.cacheMap = new Map();
        this.fields.forEach((item) => {
            this.cacheMap.set(item.Tag >> 0, item);
        });
        this.messages = new Messages();
        this.categories = new Categories();
        this.sections = new Sections();
        this.dataTypes = new DataTypes();
    }

    getField(field) {
        const data = this.cacheMap.get(field.tag);
        if (data) {
            field.setName(data.Name);
            field.setDescription(data.Description);

            if (data.BaseCategory) {
                this.categories.processCategory(field, data.BaseCategory);

                if (field.category.sectionID) {
                    this.sections.processSection(
                        field,
                        field.category.sectionID
                    );
                }
            }

            this.dataTypes.processDatatype(field, data.Type);
        } else {
            field.setType('');
            field.setValue(String(field.value));
        }
    }

    processField(message, field) {
        const data = this.cacheMap.get(field.tag);
        if (data) {
            if (field.tag === 35) {
                this.messages.processMessage(message, field);
            }

            field.setName(data.Name);
            field.setDescription(data.Description);

            if (data.BaseCategory) {
                this.categories.processCategory(field, data.BaseCategory);

                if (field.category.sectionID) {
                    this.sections.processSection(
                        field,
                        field.category.sectionID
                    );
                }
            }

            this.dataTypes.processDatatype(field, data.Type);
        } else {
            field.setType('');
            field.setValue(String(field.value));
        }
    }
}

module.exports = { Fields }