feat(CO2): add resolver for CO2 emissions

Author: fabienzucchet

src/db/types.ts

@@ -26,3 +26,14 @@ export type Price = {
   termOfferingClass?: string;
   description?: string;
 };
+
+export type Emission = {
+  emissionHash: string;
+  unit: string;
+  CO2e: string;
+  effectiveDateStart: string;
+  effectiveDateEnd?: string;
+  startUsageAmount?: string;
+  endUsageAmount?: string;
+  description?: string;
+}

src/resolvers.ts

@@ -1,6 +1,6 @@
 import { IResolvers } from '@graphql-tools/utils';
 import mingo from 'mingo';
-import { Price, Product } from './db/types';
+import { Emission, Price, Product } from './db/types';
 import currency, { CURRENCY_CODES } from './utils/currency';
 import { findProducts } from './db/query';
 import { ApplicationOptions } from './app';
@@ -28,6 +28,10 @@ interface PricesArgs {
   filter: Filter;
 }
 
+interface EmissionsArgs {
+  filter: Filter;
+}
+
 type TransformedProductAttribute = {
   key: string;
   value: string;
@@ -77,6 +81,20 @@ const getResolvers = <TContext>(
 
       return prices;
     },
+    emissions: async (product: Product, args: EmissionsArgs): Promise<Emission[]> => {
+      const emission = {
+        emissionHash: 'sampleEmissionHash',
+        unit: 'kgeqCO2',
+        CO2e: '10',
+        effectiveDateStart: '2021-01-01',
+        effectiveDateEnd: '2021-12-31',
+        startUsageAmount: '0',
+        endUsageAmount: '100',
+        description: 'test',
+      };
+
+      return [emission];
+    },
   },
   Price:
     // For every alternate currency, add a resolver that converts from USD.

src/typeDefs.ts

@@ -18,6 +18,17 @@ const typeDefs = gql`
     termOfferingClass: String
   }
 
+  type Emission {
+    emissionHash: String!
+    unit: String!
+    CO2e: String!
+    effectiveDateStart: String
+    effectiveDateEnd: String
+    startUsageAmount: String
+    endUsageAmount: String
+    description: String
+  }
+
   type Product {
     productHash: String!
     vendorName: String!
@@ -27,6 +38,7 @@ const typeDefs = gql`
     sku: String!
     attributes: [Attribute]
     prices(filter: PriceFilter): [Price]
+    emissions(filter: EmissionFilter): [Emission]
   }
 
   type Attribute {
@@ -61,6 +73,14 @@ const typeDefs = gql`
     termOfferingClass: String
   }
 
+  input EmissionFilter {
+    unit: String
+    description: String
+    description_regex: String
+    startUsageAmount: String
+    endUsageAmount: String
+  }
+
   type Query {
     products(filter: ProductFilter): [Product]
   }