Salesforce social login (#4819)

* Added Salesforce Social Login

* [Docs] Generate client_id client_secret for login providers

* [Fix] salesforce userid

Saleforce sub from openid is https://login.salesforce.com/id/ABC/XYZ
Extracting ABC/XYZ

frappe/docs/user/en/guides/integration/social_login_key.md

@@ -24,3 +24,11 @@ e.g. Social Login Key
 - **Client Secret** : `123456`
 - **Enable Social Login** : `Check`
 - **Base URL** : `https://erpnext.org` (required for some providers)
+
+#### Generating Client ID and Client Secret for providers
+
+- <a href="https://developers.google.com/identity/sign-in/web/devconsole-project">Creating a Google API Console project and client ID</a>
+- <a href="https://developers.facebook.com/docs/facebook-login/manually-build-a-login-flow">Manually Build a Login Flow for Facebook</a>
+- <a href="https://developer.github.com/apps/building-oauth-apps/creating-an-oauth-app/">Creating an OAuth App for GitHub</a>
+- <a href="https://docs.microsoft.com/en-us/azure/active-directory/develop/active-directory-protocols-openid-connect-code">Authorize access to web applications using OpenID Connect and Azure Active Directory</a>
+- <a href="https://help.salesforce.com/articleView?id=connected_app_create.htm">Create a Connected App on Salesforce</a>

frappe/integrations/doctype/social_login_key/social_login_key.json

@@ -93,7 +93,7 @@
    "label": "Social Login Provider", 
    "length": 0, 
    "no_copy": 0, 
-   "options": "Custom\nFacebook\nFrappe\nGitHub\nGoogle\nOffice 365", 
+   "options": "Custom\nFacebook\nFrappe\nGitHub\nGoogle\nOffice 365\nSalesforce", 
    "permlevel": 0, 
    "precision": "", 
    "print_hide": 0, 
@@ -660,7 +660,7 @@
  "issingle": 0, 
  "istable": 0, 
  "max_attachments": 0, 
- "modified": "2017-12-21 13:55:17.041059", 
+ "modified": "2018-01-13 21:19:37.800121", 
  "modified_by": "Administrator", 
  "module": "Integrations", 
  "name": "Social Login Key", 

frappe/integrations/doctype/social_login_key/social_login_key.py

@@ -120,6 +120,23 @@ class SocialLoginKey(Document):
 			})
 		}
 
+		providers["Salesforce"] = {
+			"provider_name": "Salesforce",
+			"enable_social_login": 1,
+			"base_url": "https://login.salesforce.com",
+			"custom_base_url": 0,
+			"icon":"fa fa-cloud", #https://github.com/FortAwesome/Font-Awesome/issues/1744
+			"redirect_url": "/api/method/frappe.integrations.oauth2_logins.login_via_salesforce",
+			"api_endpoint": "https://login.salesforce.com/services/oauth2/userinfo",
+			"api_endpoint_args":None,
+			"authorize_url": "https://login.salesforce.com/services/oauth2/authorize",
+			"access_token_url": "https://login.salesforce.com/services/oauth2/token",
+			"auth_url_data": json.dumps({
+				"response_type": "code",
+				"scope": "openid"
+			})
+		}
+
 		# Initialize the doc and return, used in patch
 		# Or can be used for creating key from controller
 		if initialize and provider:

frappe/integrations/oauth2_logins.py

@@ -26,3 +26,7 @@ def login_via_frappe(code, state):
 @frappe.whitelist(allow_guest=True)
 def login_via_office365(code, state):
 	login_via_oauth2_id_token("office_365", code, state, decoder=json.loads)
+
+@frappe.whitelist(allow_guest=True)
+def login_via_salesforce(code, state):
+	login_via_oauth2("salesforce", code, state, decoder=json.loads)

frappe/utils/oauth.py

@@ -262,6 +262,10 @@ def update_oauth_user(user, data, provider):
 		save = True
 		user.set_social_login_userid(provider, userid=data["sub"])
 
+	elif provider=="salesforce" and not user.get_social_login_userid(provider):
+		save = True
+		user.set_social_login_userid(provider, userid="/".join(data["sub"].split("/")[-2:]))
+
 	if save:
 		user.flags.ignore_permissions = True
 		user.flags.no_welcome_mail = True