79 lines
2.1 KiB
Go
79 lines
2.1 KiB
Go
// Package diagnostics provides bounded, safe text for deterministic D&D
|
|
// decisions and warnings.
|
|
package diagnostics
|
|
|
|
import (
|
|
"fmt"
|
|
"strconv"
|
|
"strings"
|
|
|
|
"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
|
|
)
|
|
|
|
const (
|
|
MaxIssues = 20
|
|
MaxWarnings = 20
|
|
MaxDisplayedRunes = 128
|
|
MaxMessageBytes = 4096
|
|
)
|
|
|
|
func Truncate(value string) string {
|
|
runes := []rune(value)
|
|
if len(runes) <= MaxDisplayedRunes {
|
|
return value
|
|
}
|
|
return string(runes[:MaxDisplayedRunes-1]) + "…"
|
|
}
|
|
|
|
func Quote(value string) string { return strconv.Quote(Truncate(value)) }
|
|
|
|
func Aggregate(prefix string, issues []string) string {
|
|
displayed := make([]string, 0, min(len(issues), MaxIssues))
|
|
for len(displayed) < len(issues) && len(displayed) < MaxIssues {
|
|
issue := Truncate(issues[len(displayed)])
|
|
candidate := aggregateMessage(prefix, append(displayed, issue), len(issues)-len(displayed)-1)
|
|
if len([]byte(candidate)) > MaxMessageBytes {
|
|
break
|
|
}
|
|
displayed = append(displayed, issue)
|
|
}
|
|
return aggregateMessage(prefix, displayed, len(issues)-len(displayed))
|
|
}
|
|
|
|
// LimitWarnings returns at most MaxWarnings warnings, reserving the final
|
|
// position for a deterministic omission summary when truncation is required.
|
|
func LimitWarnings(warnings []contracts.Warning, scope, reasonCode string) []contracts.Warning {
|
|
if warnings == nil {
|
|
return nil
|
|
}
|
|
if len(warnings) <= MaxWarnings {
|
|
bounded := make([]contracts.Warning, len(warnings))
|
|
copy(bounded, warnings)
|
|
return bounded
|
|
}
|
|
displayed := MaxWarnings - 1
|
|
bounded := make([]contracts.Warning, displayed, MaxWarnings)
|
|
copy(bounded, warnings[:displayed])
|
|
bounded = append(bounded, contracts.Warning{
|
|
Scope: scope,
|
|
ReasonCode: reasonCode,
|
|
Message: fmt.Sprintf("%d additional warning(s) omitted", len(warnings)-displayed),
|
|
})
|
|
return bounded
|
|
}
|
|
|
|
func aggregateMessage(prefix string, issues []string, omitted int) string {
|
|
message := prefix + ": " + strings.Join(issues, ", ")
|
|
if omitted > 0 {
|
|
message += fmt.Sprintf("; %d additional issue(s) omitted", omitted)
|
|
}
|
|
return message
|
|
}
|
|
|
|
func min(left, right int) int {
|
|
if left < right {
|
|
return left
|
|
}
|
|
return right
|
|
}
|