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Move description code into its own file.

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This commit is contained in:
Juliusz Chroboczek 2024-02-20 18:19:24 +01:00
parent 3792800355
commit bfe83d1a27
2 changed files with 190 additions and 179 deletions
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190
group/description.go Normal file
View file

@ -0,0 +1,190 @@
package group
import (
"encoding/json"
"os"
"path"
"path/filepath"
"strings"
"time"
)
// Description represents a group description together with some metadata
// about the JSON file it was deserialised from.
type Description struct {
// The file this was deserialised from. This is not necessarily
// the name of the group, for example in case of a subgroup.
FileName string `json:"-"`
// The modtime and size of the file. These are used to detect
// when a file has changed on disk.
modTime time.Time `json:"-"`
fileSize int64 `json:"-"`
// The user-friendly group name
DisplayName string `json:"displayName,omitempty"`
// A user-readable description of the group.
Description string `json:"description,omitempty"`
// A user-readable contact, typically an e-mail address.
Contact string `json:"contact,omitempty"`
// A user-readable comment. Ignored by the server.
Comment string `json:"comment,omitempty"`
// Whether to display the group on the landing page.
Public bool `json:"public,omitempty"`
// A URL to redirect the group to. If this is not empty, most
// other fields are ignored.
Redirect string `json:"redirect,omitempty"`
// The maximum number of simultaneous clients. Unlimited if 0.
MaxClients int `json:"max-clients,omitempty"`
// The time for which history entries are kept.
MaxHistoryAge int `json:"max-history-age,omitempty"`
// Whether users are allowed to log in with an empty username.
AllowAnonymous bool `json:"allow-anonymous,omitempty"`
// Whether recording is allowed.
AllowRecording bool `json:"allow-recording,omitempty"`
// Whether creating tokens is allowed
UnrestrictedTokens bool `json:"unrestricted-tokens,omitempty"`
// Whether subgroups are created on the fly.
AllowSubgroups bool `json:"allow-subgroups,omitempty"`
// Whether to lock the group when the last op logs out.
Autolock bool `json:"autolock,omitempty"`
// Whether to kick all users when the last op logs out.
Autokick bool `json:"autokick,omitempty"`
// A list of logins for ops.
Op []ClientPattern `json:"op,omitempty"`
// A list of logins for presenters.
Presenter []ClientPattern `json:"presenter,omitempty"`
// A list of logins for non-presenting users.
Other []ClientPattern `json:"other,omitempty"`
// The (public) keys used for token authentication.
AuthKeys []map[string]interface{} `json:"authKeys,omitempty"`
// The URL of the authentication server, if any.
AuthServer string `json:"authServer,omitempty"`
// The URL of the authentication portal, if any.
AuthPortal string `json:"authPortal,omitempty"`
// Codec preferences. If empty, a suitable default is chosen in
// the APIFromNames function.
Codecs []string `json:"codecs,omitempty"`
}
const DefaultMaxHistoryAge = 4 * time.Hour
func maxHistoryAge(desc *Description) time.Duration {
if desc.MaxHistoryAge != 0 {
return time.Duration(desc.MaxHistoryAge) * time.Second
}
return DefaultMaxHistoryAge
}
func getDescriptionFile[T any](name string, get func(string) (T, error)) (T, string, bool, error) {
isParent := false
for name != "" {
fileName := filepath.Join(
Directory, path.Clean("/"+name)+".json",
)
r, err := get(fileName)
if !os.IsNotExist(err) {
return r, fileName, isParent, err
}
isParent = true
name, _ = path.Split(name)
name = strings.TrimRight(name, "/")
}
var zero T
return zero, "", false, os.ErrNotExist
}
// descriptionMatch returns true if the description hasn't changed between
// d1 and d2
func descriptionMatch(d1, d2 *Description) bool {
if d1.FileName != d2.FileName {
return false
}
if d1.fileSize != d2.fileSize || !d1.modTime.Equal(d2.modTime) {
return false
}
return true
}
// descriptionUnchanged returns true if a group's description hasn't
// changed since it was last read.
func descriptionUnchanged(name string, desc *Description) bool {
fi, fileName, _, err := getDescriptionFile(name, os.Stat)
if err != nil || fileName != desc.FileName {
return false
}
if fi.Size() != desc.fileSize || !fi.ModTime().Equal(desc.modTime) {
return false
}
return true
}
// GetDescription gets a group description, either from cache or from disk
func GetDescription(name string) (*Description, error) {
g := Get(name)
if g != nil {
if descriptionUnchanged(name, g.description) {
return g.description, nil
}
}
return readDescription(name)
}
// readDescription reads a group's description from disk
func readDescription(name string) (*Description, error) {
r, fileName, isParent, err := getDescriptionFile(name, os.Open)
if err != nil {
return nil, err
}
defer r.Close()
var desc Description
fi, err := r.Stat()
if err != nil {
return nil, err
}
d := json.NewDecoder(r)
d.DisallowUnknownFields()
err = d.Decode(&desc)
if err != nil {
return nil, err
}
if isParent {
if !desc.AllowSubgroups {
return nil, os.ErrNotExist
}
desc.Public = false
desc.Description = ""
}
desc.FileName = fileName
desc.fileSize = fi.Size()
desc.modTime = fi.ModTime()
return &desc, nil
}

179
group/group.go
View file

@ -917,185 +917,6 @@ func GetConfiguration() (*Configuration, error) {
return configuration.configuration, nil return configuration.configuration, nil
} }
// Description represents a group description together with some metadata
// about the JSON file it was deserialised from.
type Description struct {
// The file this was deserialised from. This is not necessarily
// the name of the group, for example in case of a subgroup.
FileName string `json:"-"`
// The modtime and size of the file. These are used to detect
// when a file has changed on disk.
modTime time.Time `json:"-"`
fileSize int64 `json:"-"`
// The user-friendly group name
DisplayName string `json:"displayName,omitempty"`
// A user-readable description of the group.
Description string `json:"description,omitempty"`
// A user-readable contact, typically an e-mail address.
Contact string `json:"contact,omitempty"`
// A user-readable comment. Ignored by the server.
Comment string `json:"comment,omitempty"`
// Whether to display the group on the landing page.
Public bool `json:"public,omitempty"`
// A URL to redirect the group to. If this is not empty, most
// other fields are ignored.
Redirect string `json:"redirect,omitempty"`
// The maximum number of simultaneous clients. Unlimited if 0.
MaxClients int `json:"max-clients,omitempty"`
// The time for which history entries are kept.
MaxHistoryAge int `json:"max-history-age,omitempty"`
// Whether users are allowed to log in with an empty username.
AllowAnonymous bool `json:"allow-anonymous,omitempty"`
// Whether recording is allowed.
AllowRecording bool `json:"allow-recording,omitempty"`
// Whether creating tokens is allowed
UnrestrictedTokens bool `json:"unrestricted-tokens,omitempty"`
// Whether subgroups are created on the fly.
AllowSubgroups bool `json:"allow-subgroups,omitempty"`
// Whether to lock the group when the last op logs out.
Autolock bool `json:"autolock,omitempty"`
// Whether to kick all users when the last op logs out.
Autokick bool `json:"autokick,omitempty"`
// A list of logins for ops.
Op []ClientPattern `json:"op,omitempty"`
// A list of logins for presenters.
Presenter []ClientPattern `json:"presenter,omitempty"`
// A list of logins for non-presenting users.
Other []ClientPattern `json:"other,omitempty"`
// The (public) keys used for token authentication.
AuthKeys []map[string]interface{} `json:"authKeys,omitempty"`
// The URL of the authentication server, if any.
AuthServer string `json:"authServer,omitempty"`
// The URL of the authentication portal, if any.
AuthPortal string `json:"authPortal,omitempty"`
// Codec preferences. If empty, a suitable default is chosen in
// the APIFromNames function.
Codecs []string `json:"codecs,omitempty"`
}
const DefaultMaxHistoryAge = 4 * time.Hour
func maxHistoryAge(desc *Description) time.Duration {
if desc.MaxHistoryAge != 0 {
return time.Duration(desc.MaxHistoryAge) * time.Second
}
return DefaultMaxHistoryAge
}
func getDescriptionFile[T any](name string, get func(string) (T, error)) (T, string, bool, error) {
isParent := false
for name != "" {
fileName := filepath.Join(
Directory, path.Clean("/"+name)+".json",
)
r, err := get(fileName)
if !os.IsNotExist(err) {
return r, fileName, isParent, err
}
isParent = true
name, _ = path.Split(name)
name = strings.TrimRight(name, "/")
}
var zero T
return zero, "", false, os.ErrNotExist
}
// descriptionMatch returns true if the description hasn't changed between
// d1 and d2
func descriptionMatch(d1, d2 *Description) bool {
if d1.FileName != d2.FileName {
return false
}
if d1.fileSize != d2.fileSize || !d1.modTime.Equal(d2.modTime) {
return false
}
return true
}
// descriptionUnchanged returns true if a group's description hasn't
// changed since it was last read.
func descriptionUnchanged(name string, desc *Description) bool {
fi, fileName, _, err := getDescriptionFile(name, os.Stat)
if err != nil || fileName != desc.FileName {
return false
}
if fi.Size() != desc.fileSize || !fi.ModTime().Equal(desc.modTime) {
return false
}
return true
}
// GetDescription gets a group description, either from cache or from disk
func GetDescription(name string) (*Description, error) {
g := Get(name)
if g != nil {
if descriptionUnchanged(name, g.description) {
return g.description, nil
}
}
return readDescription(name)
}
// readDescription reads a group's description from disk
func readDescription(name string) (*Description, error) {
r, fileName, isParent, err := getDescriptionFile(name, os.Open)
if err != nil {
return nil, err
}
defer r.Close()
var desc Description
fi, err := r.Stat()
if err != nil {
return nil, err
}
d := json.NewDecoder(r)
d.DisallowUnknownFields()
err = d.Decode(&desc)
if err != nil {
return nil, err
}
if isParent {
if !desc.AllowSubgroups {
return nil, os.ErrNotExist
}
desc.Public = false
desc.Description = ""
}
desc.FileName = fileName
desc.fileSize = fi.Size()
desc.modTime = fi.ModTime()
return &desc, nil
}
// called locked // called locked
func (g *Group) getPasswordPermission(creds ClientCredentials) ([]string, error) { func (g *Group) getPasswordPermission(creds ClientCredentials) ([]string, error) {