put event implementations into their own file

Signed-off-by: Ava Affine <ava@sunnypup.io>

internal/state/events.go

@@ -0,0 +1,175 @@
+package state
+
+import (
+	"errors"
+	"time"
+	"fmt"
+	
+	"gitlab.com/whom/bingobot/internal/logging"
+)
+
+type VoteEvent map[string]string
+
+const (
+	VoteMissingKeyError = "vote data not found: "
+	VoteCreatedKey      = "created"
+	VoteRequesterKey    = "requester"
+	VoteActionKey       = "action"
+
+	VoteResultKey          = "result"
+	VoteResultPass         = "pass"
+	VoteResultFail         = "fail"
+	VoteResultTie          = "tie"
+	VoteResultTimeout      = "timeout"
+	VoteBadResultError     = "vote has invalid result: "
+	VoteNotFinishedError   = "vote has result but isnt finished"
+	VoteMissingResultError = "vote finished but missing result"
+
+	VoteStatusKey        = "status"
+	VoteStatusInProgress = "in_progress"
+	VoteStatusFinalized  = "finalized"
+	VoteStatusTimeout    = "timed_out"
+	VoteBadStatusError   = "vote has invalid status: "
+
+	VeryOldVote = "1990-01-01T00:00:00Z"
+)
+
+func (ve VoteEvent) Type() EventType {
+	return Vote
+}
+
+func (ve VoteEvent) Time() time.Time {
+	t, e := time.Parse(time.RFC3339, ve[VoteCreatedKey])
+	if e != nil {
+		// we have a corrupted event
+		// return old time so that this event gets
+		// pruned from cache
+		logging.Warn(
+			"pruning corrupted vote event",
+			"event",
+			fmt.Sprintf("%+v", ve),
+		)
+		tooOld, _ := time.Parse(
+			time.RFC3339,
+			VeryOldVote,
+		)
+		return tooOld
+	}
+	return t
+}
+
+func (ve VoteEvent) Data() map[string]string {
+	return map[string]string(ve)
+}
+
+func (ve VoteEvent) Validate() error {
+	// make sure action, requester, and created are set
+	for _, key := range []string{
+		VoteActionKey,
+		VoteRequesterKey,
+		VoteCreatedKey,
+		VoteStatusKey,
+	} {
+		if _, found := ve[key]; !found {
+			return errors.New(VoteMissingKeyError + key)
+		}
+	}
+
+	status := ve[VoteStatusKey]
+	if status != VoteStatusTimeout &&
+		status != VoteStatusInProgress &&
+		status != VoteStatusFinalized {
+		return errors.New(VoteBadStatusError + status)
+	}
+
+	result, hasResult := ve[VoteResultKey]
+	if hasResult && status == VoteStatusInProgress {
+		return errors.New(VoteNotFinishedError)
+	}
+	if status != VoteStatusInProgress && !hasResult {
+		return errors.New(VoteMissingResultError)
+	}
+
+	if hasResult &&
+		(result != VoteResultPass &&
+			result != VoteResultFail &&
+			result != VoteResultTie &&
+			result != VoteResultTimeout) {
+
+		return errors.New(VoteBadResultError + result)
+	}
+
+	return nil
+}
+
+type UserEvent struct {
+	uid     string
+	created time.Time
+}
+
+const (
+	UserEventUserKey      = "user"
+	UserEventCreatedKey   = "created"
+	UserEventBadUserError = "event has bad user"
+)
+
+func (ue UserEvent) Time() time.Time {
+	return ue.created
+}
+
+func (ue UserEvent) Data() map[string]string {
+	return map[string]string{
+		UserEventUserKey:    ue.uid,
+		UserEventCreatedKey: ue.created.Format(time.RFC3339),
+	}
+}
+
+func (ue UserEvent) Validate() error {
+	// empty for now, we may do some validation later.
+	return nil
+}
+
+type ChallengeEvent struct {
+	UserEvent
+}
+
+func (ce ChallengeEvent) Type() EventType {
+	return Challenge
+}
+
+func NewChallengeEvent(user string) ChallengeEvent {
+	return ChallengeEvent{UserEvent{
+		uid:     user,
+		created: time.Now(),
+	}}
+}
+
+type RestorationEvent struct {
+	UserEvent
+}
+
+func (re RestorationEvent) Type() EventType {
+	return Restoration
+}
+
+func NewRestorationEvent(user string) RestorationEvent {
+	return RestorationEvent{UserEvent{
+		uid:     user,
+		created: time.Now(),
+	}}
+}
+
+type UserActiveEvent struct {
+	UserEvent
+}
+
+func (ua UserActiveEvent) Type() EventType {
+	return UserActive
+}
+
+func NewUserActiveEvent(user string) UserActiveEvent {
+	return UserActiveEvent{UserEvent{
+		uid:     user,
+		created: time.Now(),
+	}}
+}