metabuilder/packages/json_script_example/seed/validation.json

{
  "schema_version": "2.1.0",
  "package": "json_script_example",
  "description": "Validation utility functions",

  "exports": {
    "functions": ["isEmail", "isNotEmpty", "validateRange"]
  },

  "functions": [
    {
      "id": "is_email_fn",
      "name": "isEmail",
      "description": "Check if string is a valid email",
      "exported": true,
      "params": [
        {"name": "email", "type": "string"}
      ],
      "returnType": "boolean",
      "body": [
        {
          "type": "comment",
          "text": "Basic email validation - contains @ and domain"
        },
        {
          "type": "const_declaration",
          "name": "hasAt",
          "value": {
            "type": "binary_expression",
            "left": {
              "type": "call_expression",
              "callee": "$ref:imports.string.indexOf",
              "args": ["$ref:params.email", "@"]
            },
            "operator": ">",
            "right": 0
          }
        },
        {
          "type": "const_declaration",
          "name": "hasDot",
          "value": {
            "type": "binary_expression",
            "left": {
              "type": "call_expression",
              "callee": "$ref:imports.string.lastIndexOf",
              "args": ["$ref:params.email", "."]
            },
            "operator": ">",
            "right": {
              "type": "call_expression",
              "callee": "$ref:imports.string.indexOf",
              "args": ["$ref:params.email", "@"]
            }
          }
        },
        {
          "type": "return",
          "value": {
            "type": "logical_expression",
            "left": "$ref:local.hasAt",
            "operator": "&&",
            "right": "$ref:local.hasDot"
          }
        }
      ]
    },
    {
      "id": "is_not_empty_fn",
      "name": "isNotEmpty",
      "description": "Check if string is not empty after trimming",
      "exported": true,
      "params": [
        {"name": "str", "type": "string"}
      ],
      "returnType": "boolean",
      "body": [
        {
          "type": "const_declaration",
          "name": "trimmed",
          "value": {
            "type": "call_expression",
            "callee": "$ref:imports.string.trim",
            "args": ["$ref:params.str"]
          }
        },
        {
          "type": "return",
          "value": {
            "type": "binary_expression",
            "left": {
              "type": "member_access",
              "object": "$ref:local.trimmed",
              "property": "length"
            },
            "operator": ">",
            "right": 0
          }
        }
      ]
    },
    {
      "id": "validate_range_fn",
      "name": "validateRange",
      "description": "Check if number is within range",
      "exported": true,
      "params": [
        {"name": "value", "type": "number"},
        {"name": "min", "type": "number"},
        {"name": "max", "type": "number"}
      ],
      "returnType": "boolean",
      "body": [
        {
          "type": "return",
          "value": {
            "type": "logical_expression",
            "left": {
              "type": "binary_expression",
              "left": "$ref:params.value",
              "operator": ">=",
              "right": "$ref:params.min"
            },
            "operator": "&&",
            "right": {
              "type": "binary_expression",
              "left": "$ref:params.value",
              "operator": "<=",
              "right": "$ref:params.max"
            }
          }
        }
      ]
    }
  ]
}