Enable sentry reporting. (#180)

This commit adds basic sentry reporting. If enabled by setting the
appropriate configuration value, it will report panics and errors.
Certain functions in the core package (Delegate, Encrypt, Decrypt,
Restore, and ResetPersisted) have additional Sentry reporting as
these are the most common errors.

core/core.go

@@ -19,6 +19,7 @@ import (
 	"github.com/cloudflare/redoctober/order"
 	"github.com/cloudflare/redoctober/passvault"
 	"github.com/cloudflare/redoctober/persist"
+	"github.com/cloudflare/redoctober/report"
 )
 
 var (
@@ -233,8 +234,11 @@ func validateName(name, password string) error {
 func Init(path string, config *config.Config) error {
 	var err error
 
+	tags := map[string]string{"function": "core.Init"}
+
 	defer func() {
 		if err != nil {
+			report.Check(err, tags)
 			log.Printf("core.init failed: %v", err)
 		} else {
 			log.Printf("core.init success: path=%s", path)
@@ -395,9 +399,15 @@ func Purge(jsonIn []byte) ([]byte, error) {
 func Delegate(jsonIn []byte) ([]byte, error) {
 	var s DelegateRequest
 	var err error
+	var tags = map[string]string{"function": "core.Delegate"}
 
 	defer func() {
 		if err != nil {
+			tags["delegation.name"] = s.Name
+			tags["delegation.uses"] = fmt.Sprintf("%d", s.Uses)
+			tags["delegation.time"] = s.Time
+			tags["delegation.users"] = strings.Join(s.Users, ", ")
+			tags["delegation.labels"] = strings.Join(s.Labels, ", ")
 			log.Printf("core.delegate failed: user=%s %v", s.Name, err)
 		} else {
 			log.Printf("core.delegate success: user=%s uses=%d time=%s users=%v labels=%v", s.Name, s.Uses, s.Time, s.Users, s.Labels)
@@ -562,9 +572,13 @@ func Password(jsonIn []byte) ([]byte, error) {
 func Encrypt(jsonIn []byte) ([]byte, error) {
 	var s EncryptRequest
 	var err error
+	var tags = map[string]string{"function": "core.Encrypt"}
 
 	defer func() {
 		if err != nil {
+			tags["encrypt.user"] = s.Name
+			tags["encrypt.size"] = fmt.Sprintf("%d", len(s.Data))
+			report.Check(err, tags)
 			log.Printf("core.encrypt failed: user=%s size=%d %v", s.Name, len(s.Data), err)
 		} else {
 			log.Printf("core.encrypt success: user=%s size=%d", s.Name, len(s.Data))
@@ -644,9 +658,12 @@ func ReEncrypt(jsonIn []byte) ([]byte, error) {
 func Decrypt(jsonIn []byte) ([]byte, error) {
 	var s DecryptRequest
 	var err error
+	var tags = map[string]string{"function": "core.Decrypt"}
 
 	defer func() {
 		if err != nil {
+			tags["decrypt.user"] = s.Name
+			report.Check(err, tags)
 			log.Printf("core.decrypt failed: user=%s %v", s.Name, err)
 		} else {
 			log.Printf("core.decrypt success: user=%s", s.Name)
@@ -674,6 +691,8 @@ func Decrypt(jsonIn []byte) ([]byte, error) {
 		Delegates: names,
 	}
 
+	tags["delegates"] = strings.Join(names, ", ")
+
 	out, err := json.Marshal(resp)
 	if err != nil {
 		return jsonStatusError(err)
@@ -991,9 +1010,12 @@ func Status(jsonIn []byte) (out []byte, err error) {
 // Restore attempts a restoration of the persistence store.
 func Restore(jsonIn []byte) (out []byte, err error) {
 	var req DelegateRequest
+	var tags = map[string]string{"function": "core.Restore"}
 
 	defer func() {
 		if err != nil {
+			tags["restore.user"] = req.Name
+			report.Check(err, tags)
 			log.Printf("core.restore failed: user=%s %v", req.Name, err)
 		} else {
 			log.Printf("core.restore success: user=%s", req.Name)
@@ -1026,9 +1048,12 @@ func Restore(jsonIn []byte) (out []byte, err error) {
 // request requires an admin.
 func ResetPersisted(jsonIn []byte) (out []byte, err error) {
 	var req PurgeRequest
+	var tags = map[string]string{"function": "core.ResetPersisted"}
 
 	defer func() {
 		if err != nil {
+			tags["reset-persisted.user"] = req.Name
+			report.Check(err, tags)
 			log.Printf("core.resetpersisted failed: user=%s %v", req.Name, err)
 		} else {
 			log.Printf("core.resetpersisted success: user=%s", req.Name)