add nodejs 6 and python for serverless triggers on gcloud functions (#608)

community/boilerplates/serverless-triggers/google-cloud-functions/README.md

@@ -6,8 +6,8 @@ Some of the language/platforms are work in progress. We welcome contributions fo
 
 | Folder name | Use-case| Node.js(8) | Node.js(6) | Python
 |-------------|---------|:--------:|:------:|:----:
-| echo | echo the trigger payload  | ✅ | ❌ | ❌ 	
+| echo | echo the trigger payload  | ✅ | ✅ | ✅
-| mutation | insert related data on an insert event using graphql mutation | ✅ | ❌ | ❌ 	 	
+| mutation | insert related data on an insert event using graphql mutation | ✅ | ✅ | ❌
 | push-notification | send push notification on database event | ❌ | ❌ | ❌ 
 | etl | transform the trigger payload and update an algolia index | ❌ | ❌ | ❌ 
 

community/boilerplates/serverless-triggers/google-cloud-functions/nodejs6/echo/.gcloudignore

@@ -0,0 +1,20 @@
+# This file specifies files that are *not* uploaded to Google Cloud Platform
+# using gcloud. It follows the same syntax as .gitignore, with the addition of
+# "#!include" directives (which insert the entries of the given .gitignore-style
+# file at that point).
+#
+# For more information, run:
+#   $ gcloud topic gcloudignore
+#
+.gcloudignore
+# If you would like to upload your .git directory, .gitignore file or files
+# from your .gitignore file, remove the corresponding line
+# below:
+.git
+.gitignore
+
+node_modules
+
+.env.yaml
+.prod.env.yaml
+

community/boilerplates/serverless-triggers/google-cloud-functions/nodejs6/echo/.gitignore

@@ -0,0 +1,2 @@
+node_modules
+.prod.env.yaml

community/boilerplates/serverless-triggers/google-cloud-functions/nodejs6/echo/README.md

@@ -0,0 +1,40 @@
+# Setup table
+
+Create the table using the console:
+
+```
+Table name: profile
+
+Columns:
+
+id: Integer auto-increment
+name: Text
+address: Text
+lat: Numeric, Nullable
+lng: Numeric, Nullable
+```
+
+# Deploy Google Cloud function
+
+Deploy the function:
+
+```bash
+gcloud beta functions deploy nodejs-echo \
+       --trigger-http
+```
+
+Get the trigger URL:
+```yaml
+httpsTrigger:
+  url: https://us-central1-hasura-test.cloudfunctions.net/nodejs-echo
+```
+
+Open Hasura console, goto `Events -> Add Trigger` and create a new trigger:
+```
+Trigger name: profile_change
+Schema/Table: public/profile
+Operations: Insert, Update, Delete
+Webhook URL: [Trigger URL]
+```
+
+Once the trigger is created, goto `Data -> profile -> Insert row` and add a row. 

community/boilerplates/serverless-triggers/google-cloud-functions/nodejs6/echo/index.js

@@ -0,0 +1,6 @@
+exports.function = (req, res) => {
+  const { event: {op, data}, table: {name, schema} } = req.body;
+  const response = {message: 'received event', data: {op, data, name, schema}};
+  console.log(response);
+  res.json(response);
+};

community/boilerplates/serverless-triggers/google-cloud-functions/nodejs6/mutation/.env.yaml

@@ -0,0 +1,2 @@
+GMAPS_API_KEY: '[GMAPS_API_KEY]'
+HASURA_GRAPHQL_ENGINE_URL: 'http://[HGE_IP]/v1alpha1/graphql'

community/boilerplates/serverless-triggers/google-cloud-functions/nodejs6/mutation/.gcloudignore

@@ -0,0 +1,19 @@
+# This file specifies files that are *not* uploaded to Google Cloud Platform
+# using gcloud. It follows the same syntax as .gitignore, with the addition of
+# "#!include" directives (which insert the entries of the given .gitignore-style
+# file at that point).
+#
+# For more information, run:
+#   $ gcloud topic gcloudignore
+#
+.gcloudignore
+# If you would like to upload your .git directory, .gitignore file or files
+# from your .gitignore file, remove the corresponding line
+# below:
+.git
+.gitignore
+
+node_modules
+
+.env.yaml
+.prod.env.yaml

community/boilerplates/serverless-triggers/google-cloud-functions/nodejs6/mutation/.gitignore

@@ -0,0 +1,2 @@
+node_modules
+.prod.env.yaml

community/boilerplates/serverless-triggers/google-cloud-functions/nodejs6/mutation/README.md

@@ -0,0 +1,71 @@
+# Setup table
+
+Create the table using the console:
+
+```
+Table name: profile
+
+Columns:
+
+id: Integer auto-increment
+name: Text
+address: Text
+lat: Numeric, Nullable
+lng: Numeric, Nullable
+```
+
+# Deploy Google Cloud function
+
+We are going to use Google Maps API in our cloud function.
+
+Enable Google Maps API and get an API key (we'll call it `GMAPS_API_KEY`) following [this
+guide](https://developers.google.com/maps/documentation/geocoding/start?hl=el#auth)
+
+Check the `Places` box to get access to Geocoding API.
+
+We'll follow [this guide](https://cloud.google.com/functions/docs/quickstart)
+and create a Cloud Function with NodeJS 6.
+
+```bash
+gcloud components update &&
+gcloud components install beta
+```
+
+Goto the `cloudfunction` directory:
+
+```bash
+cd cloudfunction
+```
+
+Edit `.env.yaml` and add values for the following as shown:
+```yaml
+# .env.yaml
+GMAPS_API_KEY: '[GMAPS_API_KEY]'
+HASURA_GRAPHQL_ENGINE_URL: 'http://[HGE_IP]/v1alpha1/graphql'
+```
+
+```bash
+gcloud beta functions deploy trigger \
+       --runtime nodejs6 \
+       --trigger-http \
+       --region asia-south1 \
+       --env-vars-file .env.yaml
+```
+
+Get the trigger URL:
+```yaml
+httpsTrigger:
+  url: https://asia-south1-hasura-test.cloudfunctions.net/trigger
+```
+
+Goto `HGE_IP` on browser, `Events -> Add Trigger` and create a new trigger:
+```
+Trigger name: profile_change
+Schema/Table: public/profile
+Operations: Insert
+Webhook URL: [Trigger URL]
+```
+
+Once the trigger is created, goto `Data -> profile -> Insert row` and add a new
+profile with name and address, save. Goto `Browse rows` tabs to see lat and lng
+updated, by the cloud function.

community/boilerplates/serverless-triggers/google-cloud-functions/nodejs6/mutation/index.js

@@ -0,0 +1,49 @@
+const fetch = require('node-fetch');
+const { query } = require('graphqurl');
+
+const MUTATION_UPDATE_LAT_LONG = `
+mutation updateLatLong($id: Int!, $lat: numeric! $lng: numeric!) {
+  update_profile(
+    where: {id: {_eq: $id}},
+    _set: {
+      lat: $lat,
+      lng: $lng
+    }
+  ) {
+    affected_rows
+    returning {
+      id
+      lat
+      lng
+    }
+  }
+}`;
+
+exports.trigger = (req, res) => {
+    const GMAPS_API_KEY = process.env.GMAPS_API_KEY;
+    const HASURA_GRAPHQL_ENGINE_URL = process.env.HASURA_GRAPHQL_ENGINE_URL;
+
+    const { event: {op, data}, table } = req.body;
+
+    if (op === 'INSERT' && table.name === 'profile' && table.schema === 'public') {
+        const { id, address } = data.new;
+        fetch(`https://maps.googleapis.com/maps/api/geocode/json?address=${address}&key=${GMAPS_API_KEY}`).then( gmaps => {
+            gmaps.json().then( gmapsResponse => {
+                if (gmapsResponse.results && gmapsResponse.results.length === 0) {
+                    res.json({error: true, data: gmapsResponse, message: `no results for address ${address}`});
+                    return;
+                }
+                const { lat, lng } = gmapsResponse.results[0].geometry.location;
+                query({
+                    query: MUTATION_UPDATE_LAT_LONG,
+                    endpoint: HASURA_GRAPHQL_ENGINE_URL,
+                    variables: { id, lat, lng },
+                }).then( hgeResponse => {
+                    res.json({error: false, data: hgeResponse.data});
+                });
+            });
+        });
+    } else {
+        res.json({error: false, message: 'ignored event'});
+    }
+};

community/boilerplates/serverless-triggers/google-cloud-functions/nodejs6/mutation/package.json

@@ -0,0 +1,15 @@
+{
+  "name": "cloudfunction",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "graphqurl": "^0.3.1",
+    "node-fetch": "^2.2.0"
+  }
+}

community/boilerplates/serverless-triggers/google-cloud-functions/python/echo/.gcloudignore

@@ -0,0 +1,18 @@
+# This file specifies files that are *not* uploaded to Google Cloud Platform
+# using gcloud. It follows the same syntax as .gitignore, with the addition of
+# "#!include" directives (which insert the entries of the given .gitignore-style
+# file at that point).
+#
+# For more information, run:
+#   $ gcloud topic gcloudignore
+#
+.gcloudignore
+# If you would like to upload your .git directory, .gitignore file or files
+# from your .gitignore file, remove the corresponding line
+# below:
+.git
+.gitignore
+
+.env.yaml
+.prod.env.yaml
+

community/boilerplates/serverless-triggers/google-cloud-functions/python/echo/.gitignore

@@ -0,0 +1 @@
+.prod.env.yaml

community/boilerplates/serverless-triggers/google-cloud-functions/python/echo/README.md

@@ -0,0 +1,41 @@
+# Setup table
+
+Create the table using the console:
+
+```
+Table name: profile
+
+Columns:
+
+id: Integer auto-increment
+name: Text
+address: Text
+lat: Numeric, Nullable
+lng: Numeric, Nullable
+```
+
+# Deploy Google Cloud function
+
+Deploy the function:
+
+```bash
+gcloud beta functions deploy python-echo \
+       --runtime python37 \
+       --trigger-http
+```
+
+Get the trigger URL:
+```yaml
+httpsTrigger:
+  url: https://us-central1-hasura-test.cloudfunctions.net/python-echo
+```
+
+Open Hasura console, goto `Events -> Add Trigger` and create a new trigger:
+```
+Trigger name: profile_change
+Schema/Table: public/profile
+Operations: Insert, Update, Delete
+Webhook URL: [Trigger URL]
+```
+
+Once the trigger is created, goto `Data -> profile -> Insert row` and add a row. 

community/boilerplates/serverless-triggers/google-cloud-functions/python/echo/main.py

@@ -0,0 +1,11 @@
+from flask import jsonify
+
+def function(request):
+    request_json = request.get_json()
+    op = request_json['event']['op']
+    data = request_json['event']['data']
+    name = request_json['table']['name']
+    schema = request_json['table']['schema']
+    response = {'message': 'received event', 'data': {op, data, name, schema}}
+    print(response)
+    return jsonify(message='received event', data={'op': op, 'data': data, 'name': name, 'schema': schema})