{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "Notification",
  "type": "object",
  "required": ["notification"],
  "properties": {
    "notification": {
      "type": "object",
      "required": ["brand_name", "greetings", "message", "details"],
      "properties": {
        "brand_name": { "type": "string" },
        "message": { "type": "string" },
        "greetings": {
          "type": "object",
          "required": ["prefix", "username"],
          "properties": {
            "prefix": { "type": "string" },
            "username": { "type": "string" }
          }
        },
        "details": {
          "type": "array",
          "minItems": 1,
          "items": {
            "type": "object",
            "required": ["category", "type", "label", "value"],
            "properties": {
              "category": { 
                "type": "string", 
                "enum": ["main-details", "extra-details"] 
              },
              "type": { 
                "type": "string",
                "enum": [
                  "assignment_title", 
                  "deadline", 
                  "lms_link", 
                  "associated_lecture_link", 
                  "youtube_lecture_link"
                ]
              },
              "label": { "type": "string" },
              "value": { "type": "string" }
            }
          }
        }
      }
    }
  }
}