Architecture.md

System Architecture

Security (optional)

See the file database.rules.json to understand the databases security rules.

Database structure

/apps/$appId/
            --> /users/$uid
                            --> /messages/$recipientId/$messageId
                                                                  --> {
                                                                        "channel_type" : "direct",                       // "direct" or "group"
                                                                        "language" : "it",
                                                                        "recipient" : "jjXVZKQSzMhOhhyIjSVOGqy4cMd2",    // recipient id
                                                                        "recipient_fullname" : "Stefano Depascalis",
                                                                        "sender" : "AHNfnoWiF7SDVy6iKVTmgsAjLOv2",       // sender id
                                                                        "sender_fullname" : "Andrea Leo",
                                                                        "status" : 150,
                                                                        "text" : "First message!!!",                     // text message
                                                                        "timestamp" : 1516288744310,
                                                                        "type" : "text"                                  // "text" or "image" or "file"
                                                                      }


                            --> /conversations/$recipientId
                                                             -->   {
                                                                    "channel_type" : "direct",
                                                                    "is_new" : true,
                                                                    "last_message_text" : "First message!!!",
                                                                    "recipient" : "jjXVZKQSzMhOhhyIjSVOGqy4cMd2",
                                                                    "recipient_fullname" : "Stefano Depascalis",
                                                                    "sender" : "AHNfnoWiF7SDVy6iKVTmgsAjLOv2",
                                                                    "sender_fullname" : "Andrea Leo",
                                                                    "status" : 2,
                                                                    "timestamp" : 1516291089368
                                                                    }


                            --> /contacts/$contactId       -->  {
                                                                "email" : "stefanodp91@gmail.com",
                                                                "firstname" : "Stefano",
                                                                "imageurl" : "",
                                                                "lastname" : "DePascalis",
                                                                "timestamp" : 1516276972508,
                                                                "uid" : "Ua1JIHK8VLVzsuRIPM2ai0xScNi2"
                                                                }


                            --> /groups/$groupId           --> {
                                                                "createdOn" : 1516278346153,
                                                                "members" : {
                                                                    "DQ6CmBKhRreONqnNvQdHVom5FEr1" : 1,
                                                                    "Ua1JIHK8VLVzsuRIPM2ai0xScNi2" : 1,
                                                                    "y4QN01LIgGPGnoV6ql07hwPAQg23" : 1,
                                                                    "yRzpS8hFulR2GnX5s85Ltj8xipv2" : 1
                                                                },
                                                                "name" : "First Group",
                                                                "owner" : "DQ6CmBKhRreONqnNvQdHVom5FEr1"
                                                                }

Messages timeline

When a message is sent it's archived into the sender timeline. With a fan-out operation the message is placed into the recipient timeline.