{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://basicstack.de/schemas/ds/expense/project_assignment/v1.0.0.json",
  "title": "DataSource Response: project_assignments (ds:expense-db-app) v1.0.0",
  "description": "Rückgabe-Schema der Datenquelle ds:expense-db-app, Resource project_assignments. Der Datenquellen-Adapter signiert eine Query Attestation mit diesem Schema als result-Teil.",
  "type": "object",
  "additionalProperties": false,
  "required": ["schema", "data_source", "resource", "filters", "rows", "returned_at"],
  "properties": {
    "schema": {
      "type": "object",
      "additionalProperties": false,
      "required": ["name", "version"],
      "properties": {
        "name":    { "const": "ds.expense.project_assignment" },
        "version": { "const": "1.0.0" }
      }
    },
    "data_source": { "const": "ds:expense-db-app" },
    "resource":    { "const": "project_assignments" },
    "filters": {
      "type": "object",
      "additionalProperties": false,
      "required": ["employee_id"],
      "properties": {
        "employee_id": { "type": "string", "pattern": "^EMP-[0-9]+$" },
        "active_on":   { "type": "string", "format": "date" }
      }
    },
    "returned_at": { "type": "string", "format": "date-time" },
    "rows": {
      "type": "array",
      "maxItems": 500,
      "items": {
        "type": "object",
        "additionalProperties": false,
        "required": ["project_code", "project_display_name", "employee_id", "valid_from"],
        "properties": {
          "project_code":         { "type": "string", "pattern": "^P-[0-9]+$" },
          "project_display_name": { "type": "string", "minLength": 1, "maxLength": 200 },
          "employee_id":          { "type": "string", "pattern": "^EMP-[0-9]+$" },
          "role":                 { "type": "string", "maxLength": 100 },
          "default_cost_center":  { "type": "string", "pattern": "^CC-[0-9]+$" },
          "valid_from":           { "type": "string", "format": "date" },
          "valid_to":             { "type": ["string", "null"], "format": "date" }
        }
      }
    }
  }
}