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composite.go
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composite.go
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// Copyright 2021 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
import (
"net/http"
"sort"
"time"
"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"
)
// HandleComposite returns composite states for realm + key server
// The key server stats may be omitted if that is not enabled
// on the realm.
func (c *Controller) HandleComposite(typ Type) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
ctx := r.Context()
currentRealm, ok := authorizeFromContext(ctx, rbac.StatsRead)
if !ok {
controller.Unauthorized(w, r, c.h)
return
}
realmStats, err := currentRealm.StatsCached(ctx, c.db, c.cacher)
if err != nil {
controller.InternalError(w, r, c.h, err)
return
}
stats := database.CompositeStats(make([]*database.CompositeDay, 0, len(realmStats)))
statsMap := make(map[time.Time]*database.CompositeDay, len(realmStats))
for _, rs := range realmStats {
day := &database.CompositeDay{
Day: rs.Date,
RealmStats: rs,
}
stats = append(stats, day)
statsMap[rs.Date] = day
}
keyServerStats, err := c.db.GetKeyServerStatsCached(ctx, currentRealm.ID, c.cacher)
if err != nil {
controller.InternalError(w, r, c.h, err)
return
}
if keyServerStats != nil {
days, err := c.db.ListKeyServerStatsDaysCached(ctx, currentRealm.ID, c.cacher)
if err != nil {
controller.InternalError(w, r, c.h, err)
return
}
for _, ksDay := range days {
compDay, ok := statsMap[ksDay.Day]
if !ok {
// if key server has stats from a day the realm doesn't, add it in.
compDay = &database.CompositeDay{
Day: ksDay.Day,
}
stats = append(stats, compDay)
}
compDay.KeyServerStats = ksDay.ToResponse()
}
sort.Slice(stats, func(i, j int) bool {
return stats[i].Day.Before(stats[j].Day)
})
}
// Trim empty days.
trimIdx := 0
for i, v := range stats {
if v.IsEmpty() {
trimIdx = i + 1
} else {
break
}
}
stats = stats[trimIdx:]
switch typ {
case TypeCSV:
c.h.RenderCSV(w, http.StatusOK, csvFilename("composite-stats"), stats)
return
case TypeJSON:
c.h.RenderJSON(w, http.StatusOK, stats)
return
default:
controller.NotFound(w, r, c.h)
return
}
})
}