Moved contents of seasoned_api up to root folder

src/config/field.js

@@ -0,0 +1,49 @@
+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;