adapter

package
Version: v0.17.10 Latest Latest
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Published: Aug 20, 2021 License: GPL-3.0 Imports: 4 Imported by: 1

Documentation

Overview

Package adapter contains the interfaces to be implemented by the database adapter

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

This section is empty.

Types

type Adapter

type Adapter interface {

	// Open and configure the adapter
	Open(config json.RawMessage) error
	// Close the adapter
	Close() error
	// IsOpen checks if the adapter is ready for use
	IsOpen() bool
	// GetDbVersion returns current database version.
	GetDbVersion() (int, error)
	// CheckDbVersion checks if the actual database version matches adapter version.
	CheckDbVersion() error
	// GetName returns the name of the adapter
	GetName() string
	// SetMaxResults configures how many results can be returned in a single DB call.
	SetMaxResults(val int) error
	// CreateDb creates the database optionally dropping an existing database first.
	CreateDb(reset bool) error
	// UpgradeDb upgrades database to the current adapter version.
	UpgradeDb() error
	// Version returns adapter version
	Version() int
	// DB connection stats object.
	Stats() interface{}

	// UserCreate creates user record
	UserCreate(user *t.User) error
	// UserGet returns record for a given user ID
	UserGet(uid t.Uid) (*t.User, error)
	// UserGetAll returns user records for a given list of user IDs
	UserGetAll(ids ...t.Uid) ([]t.User, error)
	// UserDelete deletes user record
	UserDelete(uid t.Uid, hard bool) error
	// UserUpdate updates user record
	UserUpdate(uid t.Uid, update map[string]interface{}) error
	// UserUpdateTags adds, removes, or resets user's tags
	UserUpdateTags(uid t.Uid, add, remove, reset []string) ([]string, error)
	// UserGetByCred returns user ID for the given validated credential.
	UserGetByCred(method, value string) (t.Uid, error)
	// UserUnreadCount returns the total number of unread messages in all topics with
	// the R permission.
	UserUnreadCount(uid t.Uid) (int, error)

	// CredUpsert adds or updates a credential record. Returns true if record was inserted, false if updated.
	CredUpsert(cred *t.Credential) (bool, error)
	// CredGetActive returns the currently active credential record for the given method.
	CredGetActive(uid t.Uid, method string) (*t.Credential, error)
	// CredGetAll returns credential records for the given user and method, validated only or all.
	CredGetAll(uid t.Uid, method string, validatedOnly bool) ([]t.Credential, error)
	// CredDel deletes credentials for the given method/value. If method is empty, deletes all
	// user's credentials.
	CredDel(uid t.Uid, method, value string) error
	// CredConfirm marks given credential as validated.
	CredConfirm(uid t.Uid, method string) error
	// CredFail increments count of failed validation attepmts for the given credentials.
	CredFail(uid t.Uid, method string) error

	// AuthGetUniqueRecord returns authentication record for a given unique value i.e. login.
	AuthGetUniqueRecord(unique string) (t.Uid, auth.Level, []byte, time.Time, error)
	// AuthGetRecord returns authentication record given user ID and method.
	AuthGetRecord(user t.Uid, scheme string) (string, auth.Level, []byte, time.Time, error)
	// AuthAddRecord creates new authentication record
	AuthAddRecord(user t.Uid, scheme, unique string, authLvl auth.Level, secret []byte, expires time.Time) error
	// AuthDelScheme deletes an existing authentication scheme for the user.
	AuthDelScheme(user t.Uid, scheme string) error
	// AuthDelAllRecords deletes all records of a given user.
	AuthDelAllRecords(uid t.Uid) (int, error)
	// AuthUpdRecord modifies an authentication record.
	AuthUpdRecord(user t.Uid, scheme, unique string, authLvl auth.Level, secret []byte, expires time.Time) error

	// TopicCreate creates a topic
	TopicCreate(topic *t.Topic) error
	// TopicCreateP2P creates a p2p topic
	TopicCreateP2P(initiator, invited *t.Subscription) error
	// TopicGet loads a single topic by name, if it exists. If the topic does not exist the call returns (nil, nil)
	TopicGet(topic string) (*t.Topic, error)
	// TopicsForUser loads subscriptions for a given user. Reads public value.
	// When the 'opts.IfModifiedSince' query is not nil the subscriptions with UpdatedAt > opts.IfModifiedSince
	// are returned, where UpdatedAt can be either a subscription, a topic, or a user update timestamp.
	// This is need in order to support paginagion of subscriptions: get subscriptions page by page
	// from the oldest updates to most recent:
	// 1. Client already has subscriptions with the latest update timestamp X.
	// 2. Client asks for N updated subscriptions since X. The server returns N with updates between X and Y.
	// 3. Client goes to step 1 with X := Y.
	TopicsForUser(uid t.Uid, keepDeleted bool, opts *t.QueryOpt) ([]t.Subscription, error)
	// UsersForTopic loads users' subscriptions for a given topic. Public is loaded.
	UsersForTopic(topic string, keepDeleted bool, opts *t.QueryOpt) ([]t.Subscription, error)
	// OwnTopics loads a slice of topic names where the user is the owner.
	OwnTopics(uid t.Uid) ([]string, error)
	// ChannelsForUser loads a slice of topic names where the user is a channel reader and notifications (P) are enabled.
	ChannelsForUser(uid t.Uid) ([]string, error)
	// TopicShare creates topc subscriptions
	TopicShare(subs []*t.Subscription) error
	// TopicDelete deletes topic, subscription, messages
	TopicDelete(topic string, hard bool) error
	// TopicUpdateOnMessage increments Topic's or User's SeqId value and updates TouchedAt timestamp.
	TopicUpdateOnMessage(topic string, msg *t.Message) error
	// TopicUpdate updates topic record.
	TopicUpdate(topic string, update map[string]interface{}) error
	// TopicOwnerChange updates topic's owner
	TopicOwnerChange(topic string, newOwner t.Uid) error

	// SubscriptionGet reads a subscription of a user to a topic
	SubscriptionGet(topic string, user t.Uid) (*t.Subscription, error)
	// SubsForUser loads all subscriptions of a given user. Does NOT load Public or Private values,
	// does not load deleted subscriptions.
	SubsForUser(user t.Uid) ([]t.Subscription, error)
	// SubsForTopic gets a list of subscriptions to a given topic.. Does NOT load Public value.
	SubsForTopic(topic string, keepDeleted bool, opts *t.QueryOpt) ([]t.Subscription, error)
	// SubsUpdate updates pasrt of a subscription object. Pass nil for fields which don't need to be updated
	SubsUpdate(topic string, user t.Uid, update map[string]interface{}) error
	// SubsDelete deletes a single subscription
	SubsDelete(topic string, user t.Uid) error

	// FindUsers searches for new contacts given a list of tags
	FindUsers(user t.Uid, req [][]string, opt []string) ([]t.Subscription, error)
	// FindTopics searches for group topics given a list of tags
	FindTopics(req [][]string, opt []string) ([]t.Subscription, error)

	// MessageSave saves message to database
	MessageSave(msg *t.Message) error
	// MessageGetAll returns messages matching the query
	MessageGetAll(topic string, forUser t.Uid, opts *t.QueryOpt) ([]t.Message, error)
	// MessageDeleteList marks messages as deleted.
	// Soft- or Hard- is defined by forUser value: forUSer.IsZero == true is hard.
	MessageDeleteList(topic string, toDel *t.DelMessage) error
	// MessageGetDeleted returns a list of deleted message Ids.
	MessageGetDeleted(topic string, forUser t.Uid, opts *t.QueryOpt) ([]t.DelMessage, error)
	// MessageAttachments connects given message to a list of file record IDs.
	MessageAttachments(msgId t.Uid, fids []string) error

	// DeviceUpsert creates or updates a device record
	DeviceUpsert(uid t.Uid, dev *t.DeviceDef) error
	// DeviceGetAll returns all devices for a given set of users
	DeviceGetAll(uid ...t.Uid) (map[t.Uid][]t.DeviceDef, int, error)
	// DeviceDelete deletes a device record
	DeviceDelete(uid t.Uid, deviceID string) error

	// FileStartUpload initializes a file upload
	FileStartUpload(fd *t.FileDef) error
	// FileFinishUpload marks file upload as completed, successfully or otherwise.
	FileFinishUpload(fid string, status int, size int64) (*t.FileDef, error)
	// FileGet fetches a record of a specific file
	FileGet(fid string) (*t.FileDef, error)
	// FileDeleteUnused deletes records where UseCount is zero. If olderThan is non-zero, deletes
	// unused records with UpdatedAt before olderThan.
	// Returns array of FileDef.Location of deleted filerecords so actual files can be deleted too.
	FileDeleteUnused(olderThan time.Time, limit int) ([]string, error)
}

Adapter is the interface that must be implemented by a database adapter. The current schema supports a single connection by database type.

Source Files

Directories

Path Synopsis
Package common contains utility methods used by all adapters.
Package common contains utility methods used by all adapters.

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