93 lines
2.3 KiB
Go
93 lines
2.3 KiB
Go
package pushrules
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import (
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"fmt"
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"regexp"
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)
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// ValidateRule checks the rule for errors. These follow from Sytests
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// and the specification.
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func ValidateRule(kind Kind, rule *Rule) []error {
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var errs []error
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if len(rule.RuleID) > 0 && rule.RuleID[:1] == "." {
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errs = append(errs, fmt.Errorf("invalid rule ID: rule can not start with a dot"))
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}
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if !validRuleIDRE.MatchString(rule.RuleID) {
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errs = append(errs, fmt.Errorf("invalid rule ID: %s", rule.RuleID))
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}
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if rule.Actions == nil {
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errs = append(errs, fmt.Errorf("missing actions"))
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}
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for _, action := range rule.Actions {
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errs = append(errs, validateAction(action)...)
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}
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for _, cond := range rule.Conditions {
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errs = append(errs, validateCondition(cond)...)
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}
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switch kind {
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case OverrideKind, UnderrideKind:
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// The empty list is allowed, but for JSON-encoding reasons,
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// it must not be nil.
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if rule.Conditions == nil {
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errs = append(errs, fmt.Errorf("missing rule conditions"))
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}
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case ContentKind:
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if rule.Pattern == nil {
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errs = append(errs, fmt.Errorf("missing content rule pattern"))
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}
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if rule.Pattern != nil && *rule.Pattern == "" {
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errs = append(errs, fmt.Errorf("missing content rule pattern"))
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}
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case RoomKind, SenderKind:
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// Do nothing.
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default:
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errs = append(errs, fmt.Errorf("invalid rule kind: %s", kind))
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}
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return errs
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}
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// validRuleIDRE is a regexp for valid IDs.
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//
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// TODO: the specification doesn't seem to say what the rule ID syntax
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// is. A Sytest fails if it contains a backslash.
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var validRuleIDRE = regexp.MustCompile(`^([^\\]+)$`)
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// validateAction returns issues with an Action.
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func validateAction(action *Action) []error {
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var errs []error
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switch action.Kind {
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case NotifyAction, DontNotifyAction, CoalesceAction, SetTweakAction:
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// Do nothing.
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default:
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errs = append(errs, fmt.Errorf("invalid rule action kind: %s", action.Kind))
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}
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return errs
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}
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// validateCondition returns issues with a Condition.
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func validateCondition(cond *Condition) []error {
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var errs []error
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switch cond.Kind {
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case EventMatchCondition, ContainsDisplayNameCondition, RoomMemberCountCondition, SenderNotificationPermissionCondition:
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// Do nothing.
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default:
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errs = append(errs, fmt.Errorf("invalid rule condition kind: %s", cond.Kind))
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}
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return errs
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}
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