🚧 stubs out linkpreview service

Holding on this until after news is cleaned up

Issue: #437

config/settings.py

@@ -394,6 +394,11 @@ STATIC_CONTENT_AWS_S3_ENDPOINT_URL = env(
     "STATIC_CONTENT_AWS_S3_ENDPOINT_URL", default="https://s3.us-east-2.amazonaws.com"
 )
 
+# LinkPreview API Key
+LINK_PREVIEW_API_KEY = env(
+    "LINK_PREVIEW_API_KEY", default="changeme"
+)
+
 # JSON configuration of how we map static content in the S3 buckets to URL paths
 STATIC_CONTENT_MAPPING = env(
     "STATIC_CONTENT_MAPPING", default="stage_static_config.json"

news/forms.py

@@ -1,4 +1,5 @@
 from django import forms
+from .helpers import get_link_preview_data
 from .models import BlogPost, Entry, Link, News, Poll, Video
 
 
@@ -30,6 +31,15 @@ class LinkForm(EntryForm):
         model = Link
         fields = ["title", "publish_at", "external_url", "image"]
 
+    # Holding on this as it's a new feature Issue #437
+    # def save(self, *args, commit=True, **kwargs):
+    #     instance = super().save(*args, commit=False, **kwargs)
+    #     if self.cleaned_data["external_url"] and not self.cleaned_data["image"]:
+    #         link_data = get_link_preview_data(self.cleaned_data["external_url"])
+    #         print(link_data)
+    #     instance.save()
+    #     return instance
+
 
 class NewsForm(EntryForm):
     class Meta:

news/helpers.py

@@ -0,0 +1,18 @@
+import requests
+
+from django.conf import settings
+
+
+def get_link_preview_data(link):
+    """gets the link preview json response from LinkPreview api"""
+    api_url = "https://api.linkpreview.net"
+    api_key = settings.LINK_PREVIEW_API_KEY
+    target = link
+
+    # TODO: Add additional field `image_size` to help validate image https://docs.linkpreview.net/#image-processing-and-validation
+    response = requests.get(
+        api_url,
+        headers={'X-Linkpreview-Api-Key': api_key},
+        params={'q': target},
+    )
+    return response.json()