numscript/internal/interpreter/accounts_metadata.go

package interpreter

import (
	"github.com/hanzo-fi/numscript/internal/utils"
)

type AccountMetadataRow struct {
	Account string `json:"account"`
	Key     string `json:"key"`
	Value   string `json:"value"`
	Scope   string `json:"scope,omitempty"`
}

// AccountsMetadata is the external, serialized representation of account
// metadata. The runtime works with the in-memory InternalAccountsMetadata and
// converts to this at the boundaries (store queries, execution result).
type AccountsMetadata []AccountMetadataRow

// FirstDuplicate returns the first row whose (account, key, scope) key already
// appeared earlier in the list, if any. That triple is the identity of a
// metadata entry and the value is its content, so a repeated key is an
// ambiguous, malformed input.
func (rows AccountsMetadata) FirstDuplicate() (AccountMetadataRow, bool) {
	seen := make(map[[3]string]struct{}, len(rows))
	for _, row := range rows {
		key := [3]string{row.Account, row.Key, row.Scope}
		if _, ok := seen[key]; ok {
			return row, true
		}
		seen[key] = struct{}{}
	}
	return AccountMetadataRow{}, false
}

func (m AccountsMetadata) PrettyPrint() string {
	// the Scope column is dropped automatically when no entry has a scope
	header := []string{"Account", "Scope", "Name", "Value"}

	var rows [][]string
	for _, row := range m {
		rows = append(rows, []string{row.Account, row.Scope, row.Key, row.Value})
	}

	return utils.CsvPrettyOmitEmptyCols(header, rows, true)
}