src holds all controllers, config and api

src/config/field.js

@@ -0,0 +1,50 @@
+const Filters = require('./filters.js');
+const EnvironmentVariables = require('./environmentVariables.js');
+
+class Field {
+
+	constructor(rawValue, environmentVariables) {
+		this.rawValue, rawValue;
+		this.filters = new Filters(rawValue);
+		this.valueWithoutFilters = this.filters.removeFiltersFromValue();
+		this.environmentVariables = new EnvironmentVariables(environmentVariables);
+	}
+
+	get value() {
+		if (this.filters.isEmpty()) {
+		  return this.valueWithoutFilters;
+		}
+
+		if (this.filters.has('base64') && !this.filters.has('env')) {
+		  return Field.base64Decode(this.valueWithoutFilters);
+		}
+
+		if (this.environmentVariables.has(this.valueWithoutFilters) &&
+		    this.environmentVariables.get(this.valueWithoutFilters) === '') {
+		  return undefined;
+		}
+
+		if (!this.filters.has('base64') && this.filters.has('env')) {
+		  if (this.environmentVariables.has(this.valueWithoutFilters)) {
+		    return this.environmentVariables.get(this.valueWithoutFilters);
+		  }
+		  return undefined;
+		}
+
+		if (this.filters.has('env') && this.filters.has('base64')) {
+		  if (this.environmentVariables.has(this.valueWithoutFilters)) {
+		    const encodedEnvironmentVariable = this.environmentVariables.get(this.valueWithoutFilters);
+		    return Field.base64Decode(encodedEnvironmentVariable);
+		  }
+		  return undefined;
+		}
+
+		return this.valueWithoutFilters;
+		}
+
+		static base64Decode(string) {
+		return new Buffer(string, 'base64').toString('utf-8');
+	}
+}
+
+module.exports = Field;