/
couch.go
95 lines (77 loc) · 2.3 KB
/
couch.go
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package couch
import (
"context"
"errors"
"fmt"
"net/http"
pcconfig "github.com/byuoitav/pc-config"
_ "github.com/go-kivik/couchdb/v3"
"github.com/go-kivik/kivik/v3"
)
type configService struct {
client *kivik.Client
uiConfigDB string
pcMappingDB string
}
// New creates a new ConfigService, created a couchdb client pointed at url.
func New(ctx context.Context, url string, opts ...Option) (pcconfig.ConfigService, error) {
client, err := kivik.New("couch", url)
if err != nil {
return nil, fmt.Errorf("unable to build client: %w", err)
}
return NewWithClient(ctx, client, opts...)
}
// NewWithClient creates a new ConfigService using the given client.
func NewWithClient(ctx context.Context, client *kivik.Client, opts ...Option) (pcconfig.ConfigService, error) {
options := options{
uiConfigDB: _defaultUIConfigDB,
pcMappingDB: _defaultPCMappingDB,
}
for _, o := range opts {
o.apply(&options)
}
if options.authFunc != nil {
if err := client.Authenticate(ctx, options.authFunc); err != nil {
return nil, fmt.Errorf("unable to authenticate: %w", err)
}
}
return &configService{
client: client,
uiConfigDB: options.uiConfigDB,
pcMappingDB: options.pcMappingDB,
}, nil
}
func (c *configService) RoomAndControlGroup(ctx context.Context, hostname string) (string, string, error) {
var mapping pcMapping
var err error
db := c.client.DB(ctx, c.pcMappingDB)
for {
err = db.Get(ctx, hostname).ScanDoc(&mapping)
switch kivik.StatusCode(err) {
case 0:
return mapping.UIConfig, mapping.ControlGroup, nil
case http.StatusNotFound:
// try again
default:
return "", "", fmt.Errorf("unable to get/scan pc mapping: %w", err)
}
if len(hostname) < 4 {
break
}
hostname = hostname[:len(hostname)-1]
}
return "", "", fmt.Errorf("unable to get/scan pc mapping: %w", err)
}
func (c *configService) Cameras(ctx context.Context, room, controlGroup string) ([]pcconfig.Camera, error) {
var config uiConfig
db := c.client.DB(ctx, c.uiConfigDB)
if err := db.Get(ctx, room).ScanDoc(&config); err != nil {
return []pcconfig.Camera{}, fmt.Errorf("unable to get/scan ui config: %w", err)
}
for _, cg := range config.ControlGroups {
if cg.ID == controlGroup {
return cg.Cameras, nil
}
}
return []pcconfig.Camera{}, errors.New("no matching control group found")
}