Refactor ModelMetadata

Use getFieldHash() for getting the prop types as well, passing in convertToPropType.

src/Models/Ringdown.js

@@ -2,6 +2,7 @@ import { DateTime } from 'luxon';
 import PropTypes from 'prop-types';
 import { PatientFieldData, ValidationState } from './PatientFieldData';
 import patient from '../metadata/patient';
+import convertToPropType from '../metadata/convertToPropType';
 import DeliveryStatus from '../constants/DeliveryStatus';
 
 function attachFields(target, fields, data) {
@@ -288,7 +289,7 @@ Ringdown.propTypes = {
   dispatchCallNumber: PropTypes.number.isRequired,
   hospitalId: PropTypes.string.isRequired,
   // Patient Info
-  ...patient.getPropTypes(PropTypes),
+  ...patient.getFieldHash(convertToPropType),
   // Status
   etaMinutes: PropTypes.number.isRequired,
   currentDeliveryStatus: PropTypes.oneOf(DeliveryStatus.ALL_STATUSES),

src/metadata/ModelMetadata.js

@@ -1,38 +1,25 @@
 const FieldMetadata = require('./FieldMetadata');
 
-const PropTypeLookup = {
-  text: 'string',
-  integer: 'number',
-  decimal: 'number',
-  boolean: 'bool',
-};
-
 const identity = (field) => [field.name, field];
 
-function createParamsList(fields) {
-  const params = fields.filter(({ isParam }) => isParam).map(({ name }) => name);
-
-  return Object.freeze(params);
-}
-
 class ModelMetadata {
   constructor({ modelName, tableName = modelName.toLowerCase(), fields }) {
     this.modelName = modelName;
     this.tableName = tableName;
     this.fields = Object.freeze(fields.map((field) => new FieldMetadata(field)));
-    this.params = createParamsList(this.fields);
+    this.params = Object.freeze(this.fields.filter(({ isParam }) => isParam).map(({ name }) => name));
   }
 
   getFieldHash(convertField = identity) {
-    const hash = {};
-
-    this.fields.forEach((field) => {
+    this.fields.reduce((result, field) => {
       const [name, convertedField] = convertField(field);
 
-      hash[name] = convertedField;
-    });
+      if (name && convertedField) {
+        result[name] = convertedField;
+      }
 
-    return hash;
+      return result;
+    }, {});
   }
 
   getParams() {
@@ -42,26 +29,6 @@ class ModelMetadata {
   getObjectFields() {
     return this.fields.filter(({ type, isParam }) => isParam || type === 'enum');
   }
-
-  getPropTypes(PropTypes) {
-    return this.getObjectFields().reduce((result, field) => {
-      const { name, type, enumValues, required } = field;
-      const reactType = PropTypeLookup[type];
-      let propType = PropTypes[reactType];
-
-      if (type === 'enum') {
-        propType = PropTypes.oneOf(enumValues);
-      }
-
-      if (required) {
-        propType = propType.isRequired;
-      }
-
-      result[name] = propType;
-
-      return result;
-    }, {});
-  }
 }
 
 module.exports = ModelMetadata;

src/metadata/convertToPropType.js

@@ -0,0 +1,32 @@
+const PropTypes = require('prop-types');
+
+const PropTypeLookup = {
+  text: 'string',
+  integer: 'number',
+  decimal: 'number',
+  boolean: 'bool',
+};
+
+module.exports = function convertToPropType(field) {
+  const { name, type, isParam, enumValues, required } = field;
+  // if the field isn't something we want to convert to a propType, then return an empty array so
+  // getFieldHash() won't include this field
+  let result = [];
+
+  if (isParam || type === 'enum') {
+    const reactType = PropTypeLookup[type];
+    let propType = PropTypes[reactType];
+
+    if (type === 'enum') {
+      propType = PropTypes.oneOf(enumValues);
+    }
+
+    if (required) {
+      propType = propType.isRequired;
+    }
+
+    result = [name, propType];
+  }
+
+  return result;
+};