first commit

base44/entities/Message.jsonc

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+{
+  "name": "Message",
+  "type": "object",
+  "properties": {
+    "conversation_id": {
+      "type": "string",
+      "description": "ID of the conversation"
+    },
+    "sender_id": {
+      "type": "string",
+      "description": "ID of the sender"
+    },
+    "sender_name": {
+      "type": "string",
+      "description": "Name of the sender"
+    },
+    "sender_role": {
+      "type": "string",
+      "enum": [
+        "client",
+        "vendor",
+        "staff",
+        "admin"
+      ],
+      "description": "Role of the sender"
+    },
+    "content": {
+      "type": "string",
+      "description": "Message content"
+    },
+    "read_by": {
+      "type": "array",
+      "description": "Array of user IDs who have read the message",
+      "items": {
+        "type": "string"
+      }
+    },
+    "attachments": {
+      "type": "array",
+      "description": "Attached files",
+      "items": {
+        "type": "object",
+        "properties": {
+          "url": {
+            "type": "string"
+          },
+          "name": {
+            "type": "string"
+          },
+          "type": {
+            "type": "string"
+          }
+        }
+      }
+    }
+  },
+  "required": [
+    "conversation_id",
+    "sender_name",
+    "content"
+  ]
+}