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stats.go
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stats.go
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// Copyright 2020 the Exposure Notifications Verification Server authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Package stats produces statistics.
package stats
import (
"context"
"fmt"
"regexp"
"time"
"github.com/google/exposure-notifications-verification-server/internal/project"
"github.com/google/exposure-notifications-verification-server/pkg/cache"
"github.com/google/exposure-notifications-verification-server/pkg/controller"
"github.com/google/exposure-notifications-verification-server/pkg/database"
"github.com/google/exposure-notifications-verification-server/pkg/rbac"
"github.com/google/exposure-notifications-verification-server/pkg/render"
)
// notFilenameRe is a regular expression that matches non-filename characters.
var notFilenameRe = regexp.MustCompile(`[^A-Za-z0-9]+`)
// Type represents a type of stat.
type Type int64
const (
_ Type = iota
TypeCSV
TypeJSON
)
// Controller is a stats controller.
type Controller struct {
cacher cache.Cacher
db *database.Database
h *render.Renderer
}
// New creates a new stats controller.
func New(cacher cache.Cacher, db *database.Database, h *render.Renderer) *Controller {
return &Controller{
cacher: cacher,
db: db,
h: h,
}
}
// authorizeFromContext attempts to pull authorization from the context. It
// returns false if authorization failed. The authorization must have one of the
// provided permissions to succeed.
func authorizeFromContext(ctx context.Context, permissions ...rbac.Permission) (*database.Realm, bool) {
membership := controller.MembershipFromContext(ctx)
if membership != nil {
for _, permission := range permissions {
if membership.Can(permission) {
return membership.Realm, true
}
}
}
realm := controller.RealmFromContext(ctx)
if realm != nil {
return realm, true
}
return nil, false
}
// csvFilename returns the formatted filename for now.
func csvFilename(name string) string {
nowFormatted := time.Now().Format(project.RFC3339Squish)
return fmt.Sprintf("%s-%s.csv", nowFormatted, name)
}