2019-11-21 16:19:22 +00:00
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package protocol
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2019-07-17 22:25:42 +00:00
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2019-08-29 06:33:46 +00:00
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import (
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"crypto/ecdsa"
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2021-10-01 09:59:42 +00:00
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"encoding/json"
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2020-02-07 11:56:30 +00:00
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"errors"
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2019-12-02 15:34:05 +00:00
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"math/rand"
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2019-08-29 06:33:46 +00:00
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2019-11-23 17:57:05 +00:00
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"github.com/status-im/status-go/eth-node/crypto"
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"github.com/status-im/status-go/eth-node/types"
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2020-09-01 13:27:01 +00:00
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"github.com/status-im/status-go/protocol/common"
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2020-11-18 09:16:51 +00:00
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"github.com/status-im/status-go/protocol/communities"
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2019-12-02 15:34:05 +00:00
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"github.com/status-im/status-go/protocol/protobuf"
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2019-11-21 16:19:22 +00:00
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v1protocol "github.com/status-im/status-go/protocol/v1"
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2019-08-29 06:33:46 +00:00
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)
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2019-07-17 22:25:42 +00:00
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2019-12-02 15:34:05 +00:00
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var chatColors = []string{
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"#fa6565", // red
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"#887af9", // blue
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"#FE8F59", // orange
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"#7cda00", // green
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"#51d0f0", // light-blue
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"#d37ef4", // purple
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}
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2019-07-30 18:39:16 +00:00
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type ChatType int
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const (
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2019-10-09 14:22:53 +00:00
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ChatTypeOneToOne ChatType = iota + 1
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2019-07-30 18:39:16 +00:00
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ChatTypePublic
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ChatTypePrivateGroupChat
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2020-10-20 15:10:28 +00:00
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ChatTypeProfile
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2020-11-03 10:16:05 +00:00
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ChatTypeTimeline
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2020-11-18 09:16:51 +00:00
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ChatTypeCommunityChat
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2019-07-30 18:39:16 +00:00
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)
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2020-11-18 09:16:51 +00:00
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const pkStringLength = 68
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2021-03-25 15:15:22 +00:00
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// timelineChatID is a magic constant id for your own timeline
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const timelineChatID = "@timeline70bd746ddcc12beb96b2c9d572d0784ab137ffc774f5383e50585a932080b57cca0484b259e61cecbaa33a4c98a300a"
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2019-07-30 18:39:16 +00:00
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type Chat struct {
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// ID is the id of the chat, for public chats it is the name e.g. status, for one-to-one
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// is the hex encoded public key and for group chats is a random uuid appended with
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// the hex encoded pk of the creator of the chat
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2021-06-01 12:13:17 +00:00
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ID string `json:"id"`
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Name string `json:"name"`
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Description string `json:"description"`
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Color string `json:"color"`
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2021-10-04 13:02:25 +00:00
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Emoji string `json:"emoji"`
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2019-07-30 18:39:16 +00:00
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// Active indicates whether the chat has been soft deleted
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Active bool `json:"active"`
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ChatType ChatType `json:"chatType"`
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// Timestamp indicates the last time this chat has received/sent a message
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Timestamp int64 `json:"timestamp"`
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// LastClockValue indicates the last clock value to be used when sending messages
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LastClockValue uint64 `json:"lastClockValue"`
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// DeletedAtClockValue indicates the clock value at time of deletion, messages
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// with lower clock value of this should be discarded
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DeletedAtClockValue uint64 `json:"deletedAtClockValue"`
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2021-10-12 10:33:32 +00:00
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// ReadMessagesAtClockValue indicates the clock value of time till all
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// messages are considered as read
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ReadMessagesAtClockValue uint64
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2019-07-30 18:39:16 +00:00
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// Denormalized fields
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2020-09-01 13:27:01 +00:00
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UnviewedMessagesCount uint `json:"unviewedMessagesCount"`
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2021-05-26 06:38:25 +00:00
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UnviewedMentionsCount uint `json:"unviewedMentionsCount"`
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2020-09-01 13:27:01 +00:00
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LastMessage *common.Message `json:"lastMessage"`
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2019-07-30 18:39:16 +00:00
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// Group chat fields
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// Members are the members who have been invited to the group chat
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Members []ChatMember `json:"members"`
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// MembershipUpdates is all the membership events in the chat
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2019-12-02 15:34:05 +00:00
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MembershipUpdates []v1protocol.MembershipUpdateEvent `json:"membershipUpdateEvents"`
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2020-05-20 12:16:12 +00:00
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// Generated username name of the chat for one-to-ones
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Alias string `json:"alias,omitempty"`
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// Identicon generated from public key
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Identicon string `json:"identicon"`
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2020-06-26 07:46:14 +00:00
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// Muted is used to check whether we want to receive
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// push notifications for this chat
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2021-09-03 08:26:05 +00:00
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Muted bool `json:"muted"`
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2020-08-07 13:49:37 +00:00
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// Public key of administrator who created invitation link
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InvitationAdmin string `json:"invitationAdmin,omitempty"`
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2020-10-20 15:10:28 +00:00
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2021-11-25 15:21:42 +00:00
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// Public key of administrator who sent us group invitation
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ReceivedInvitationAdmin string `json:"receivedInvitationAdmin,omitempty"`
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2020-10-20 15:10:28 +00:00
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// Public key of user profile
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Profile string `json:"profile,omitempty"`
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2020-11-18 09:16:51 +00:00
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// CommunityID is the id of the community it belongs to
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CommunityID string `json:"communityId,omitempty"`
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2021-05-23 13:34:17 +00:00
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// CategoryID is the id of the community category this chat belongs to.
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CategoryID string `json:"categoryId,omitempty"`
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2021-05-18 08:48:42 +00:00
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// Joined is a timestamp that indicates when the chat was joined
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Joined int64 `json:"joined,omitempty"`
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2021-03-25 15:15:22 +00:00
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// SyncedTo is the time up until it has synced with a mailserver
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SyncedTo uint32 `json:"syncedTo,omitempty"`
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// SyncedFrom is the time from when it was synced with a mailserver
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SyncedFrom uint32 `json:"syncedFrom,omitempty"`
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2021-10-21 17:04:56 +00:00
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// Highlight is used for highlight chats
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Highlight bool `json:"highlight,omitempty"`
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2019-12-02 15:34:05 +00:00
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}
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2021-09-07 14:05:36 +00:00
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type ChatPreview struct {
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// ID is the id of the chat, for public chats it is the name e.g. status, for one-to-one
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// is the hex encoded public key and for group chats is a random uuid appended with
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// the hex encoded pk of the creator of the chat
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ID string `json:"id"`
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Name string `json:"name"`
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Description string `json:"description"`
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Color string `json:"color"`
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2021-10-04 13:02:25 +00:00
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Emoji string `json:"emoji"`
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2021-09-07 14:05:36 +00:00
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// Active indicates whether the chat has been soft deleted
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Active bool `json:"active"`
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ChatType ChatType `json:"chatType"`
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// Timestamp indicates the last time this chat has received/sent a message
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Timestamp int64 `json:"timestamp"`
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// LastClockValue indicates the last clock value to be used when sending messages
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LastClockValue uint64 `json:"lastClockValue"`
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// DeletedAtClockValue indicates the clock value at time of deletion, messages
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// with lower clock value of this should be discarded
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DeletedAtClockValue uint64 `json:"deletedAtClockValue"`
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// Denormalized fields
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UnviewedMessagesCount uint `json:"unviewedMessagesCount"`
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UnviewedMentionsCount uint `json:"unviewedMentionsCount"`
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// Generated username name of the chat for one-to-ones
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Alias string `json:"alias,omitempty"`
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// Identicon generated from public key
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Identicon string `json:"identicon"`
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// Muted is used to check whether we want to receive
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// push notifications for this chat
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Muted bool `json:"muted,omitempty"`
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// Public key of user profile
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Profile string `json:"profile,omitempty"`
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// CommunityID is the id of the community it belongs to
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CommunityID string `json:"communityId,omitempty"`
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// CategoryID is the id of the community category this chat belongs to.
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CategoryID string `json:"categoryId,omitempty"`
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// Joined is a timestamp that indicates when the chat was joined
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Joined int64 `json:"joined,omitempty"`
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// SyncedTo is the time up until it has synced with a mailserver
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SyncedTo uint32 `json:"syncedTo,omitempty"`
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// SyncedFrom is the time from when it was synced with a mailserver
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SyncedFrom uint32 `json:"syncedFrom,omitempty"`
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2021-10-01 09:59:42 +00:00
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// ParsedText is the parsed markdown for displaying
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ParsedText json.RawMessage `json:"parsedText,omitempty"`
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2021-09-07 14:05:36 +00:00
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Text string `json:"text,omitempty"`
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ContentType protobuf.ChatMessage_ContentType `json:"contentType,omitempty"`
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2021-10-21 17:04:56 +00:00
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// Highlight is used for highlight chats
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Highlight bool `json:"highlight,omitempty"`
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// Used for display invited community's name in the last message
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ContentCommunityID string `json:"contentCommunityId,omitempty"`
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2021-09-07 14:05:36 +00:00
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}
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2019-12-02 15:34:05 +00:00
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func (c *Chat) PublicKey() (*ecdsa.PublicKey, error) {
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// For one to one chatID is an encoded public key
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if c.ChatType != ChatTypeOneToOne {
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return nil, nil
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}
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2020-11-18 09:16:51 +00:00
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return common.HexToPubkey(c.ID)
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2019-07-30 18:39:16 +00:00
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}
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2020-01-15 07:25:09 +00:00
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func (c *Chat) Public() bool {
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return c.ChatType == ChatTypePublic
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}
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2020-10-20 15:10:28 +00:00
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func (c *Chat) ProfileUpdates() bool {
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2021-03-04 16:41:41 +00:00
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return c.ChatType == ChatTypeProfile || len(c.Profile) > 0
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2020-10-20 15:10:28 +00:00
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}
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2020-11-03 10:16:05 +00:00
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func (c *Chat) Timeline() bool {
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2021-03-04 13:02:08 +00:00
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return c.ChatType == ChatTypeTimeline
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2020-11-03 10:16:05 +00:00
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}
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2020-02-07 11:56:30 +00:00
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func (c *Chat) OneToOne() bool {
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return c.ChatType == ChatTypeOneToOne
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}
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2021-03-31 16:23:45 +00:00
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func (c *Chat) CommunityChat() bool {
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return c.ChatType == ChatTypeCommunityChat
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}
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func (c *Chat) PrivateGroupChat() bool {
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return c.ChatType == ChatTypePrivateGroupChat
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}
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2020-11-18 09:16:51 +00:00
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func (c *Chat) CommunityChatID() string {
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if c.ChatType != ChatTypeCommunityChat {
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return c.ID
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}
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// Strips out the local prefix of the community-id
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return c.ID[pkStringLength:]
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}
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2020-02-07 11:56:30 +00:00
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func (c *Chat) Validate() error {
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if c.ID == "" {
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return errors.New("chatID can't be blank")
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}
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if c.OneToOne() {
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_, err := c.PublicKey()
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return err
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}
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return nil
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}
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2019-10-14 14:10:48 +00:00
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func (c *Chat) MembersAsPublicKeys() ([]*ecdsa.PublicKey, error) {
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publicKeys := make([]string, len(c.Members))
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for idx, item := range c.Members {
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publicKeys[idx] = item.ID
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}
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2020-11-18 09:16:51 +00:00
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return stringSliceToPublicKeys(publicKeys)
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2019-10-14 14:10:48 +00:00
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}
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2020-04-22 12:58:28 +00:00
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func (c *Chat) HasMember(memberID string) bool {
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for _, member := range c.Members {
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if memberID == member.ID {
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return true
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}
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}
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return false
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}
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2022-05-20 10:53:28 +00:00
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func (c *Chat) RemoveMember(memberID string) {
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members := c.Members
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c.Members = []ChatMember{}
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for _, member := range members {
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if memberID != member.ID {
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c.Members = append(c.Members, member)
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2021-04-07 12:57:14 +00:00
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}
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}
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}
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func (c *Chat) updateChatFromGroupMembershipChanges(g *v1protocol.Group) {
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2020-04-22 12:58:28 +00:00
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2019-10-14 14:10:48 +00:00
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// ID
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c.ID = g.ChatID()
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// Name
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c.Name = g.Name()
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// Members
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members := g.Members()
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admins := g.Admins()
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chatMembers := make([]ChatMember, 0, len(members))
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for _, m := range members {
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2020-04-22 12:58:28 +00:00
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2019-10-14 14:10:48 +00:00
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chatMember := ChatMember{
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ID: m,
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}
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chatMember.Admin = stringSliceContains(admins, m)
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chatMembers = append(chatMembers, chatMember)
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}
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c.Members = chatMembers
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// MembershipUpdates
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2019-12-02 15:34:05 +00:00
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c.MembershipUpdates = g.Events()
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2019-10-14 14:10:48 +00:00
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}
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2020-02-07 11:30:26 +00:00
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// NextClockAndTimestamp returns the next clock value
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// and the current timestamp
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2020-11-18 09:16:51 +00:00
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func (c *Chat) NextClockAndTimestamp(timesource common.TimeSource) (uint64, uint64) {
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2020-02-07 11:30:26 +00:00
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clock := c.LastClockValue
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timestamp := timesource.GetCurrentTime()
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if clock == 0 || clock < timestamp {
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clock = timestamp
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} else {
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clock = clock + 1
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}
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return clock, timestamp
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}
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2020-11-18 09:16:51 +00:00
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func (c *Chat) UpdateFromMessage(message *common.Message, timesource common.TimeSource) error {
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2020-02-07 11:30:26 +00:00
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c.Timestamp = int64(timesource.GetCurrentTime())
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2020-07-30 20:54:33 +00:00
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// If the clock of the last message is lower, we set the message
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if c.LastMessage == nil || c.LastMessage.Clock <= message.Clock {
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c.LastMessage = message
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2020-02-07 11:30:26 +00:00
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}
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2020-07-30 19:14:47 +00:00
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// If the clock is higher we set the clock
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2020-07-30 20:54:33 +00:00
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if c.LastClockValue < message.Clock {
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2020-07-30 19:14:47 +00:00
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c.LastClockValue = message.Clock
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}
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2020-02-07 11:30:26 +00:00
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return nil
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}
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2019-07-30 18:39:16 +00:00
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// ChatMembershipUpdate represent an event on membership of the chat
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type ChatMembershipUpdate struct {
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// Unique identifier for the event
|
|
|
|
ID string `json:"id"`
|
2019-12-02 15:34:05 +00:00
|
|
|
// Type indicates the kind of event
|
|
|
|
Type protobuf.MembershipUpdateEvent_EventType `json:"type"`
|
2019-07-30 18:39:16 +00:00
|
|
|
// Name represents the name in the event of changing name events
|
2019-08-20 11:20:25 +00:00
|
|
|
Name string `json:"name,omitempty"`
|
2019-07-30 18:39:16 +00:00
|
|
|
// Clock value of the event
|
|
|
|
ClockValue uint64 `json:"clockValue"`
|
|
|
|
// Signature of the event
|
|
|
|
Signature string `json:"signature"`
|
|
|
|
// Hex encoded public key of the creator of the event
|
|
|
|
From string `json:"from"`
|
|
|
|
// Target of the event for single-target events
|
2019-08-20 11:20:25 +00:00
|
|
|
Member string `json:"member,omitempty"`
|
2019-07-30 18:39:16 +00:00
|
|
|
// Target of the event for multi-target events
|
2019-08-20 11:20:25 +00:00
|
|
|
Members []string `json:"members,omitempty"`
|
2019-07-30 18:39:16 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
// ChatMember represents a member who participates in a group chat
|
|
|
|
type ChatMember struct {
|
|
|
|
// ID is the hex encoded public key of the member
|
|
|
|
ID string `json:"id"`
|
|
|
|
// Admin indicates if the member is an admin of the group chat
|
|
|
|
Admin bool `json:"admin"`
|
2019-07-17 22:25:42 +00:00
|
|
|
}
|
2019-08-29 06:33:46 +00:00
|
|
|
|
|
|
|
func (c ChatMember) PublicKey() (*ecdsa.PublicKey, error) {
|
2020-11-18 09:16:51 +00:00
|
|
|
return common.HexToPubkey(c.ID)
|
2019-08-29 06:33:46 +00:00
|
|
|
}
|
2019-09-26 07:01:17 +00:00
|
|
|
|
|
|
|
func oneToOneChatID(publicKey *ecdsa.PublicKey) string {
|
2019-11-23 17:57:05 +00:00
|
|
|
return types.EncodeHex(crypto.FromECDSAPub(publicKey))
|
2019-09-26 07:01:17 +00:00
|
|
|
}
|
|
|
|
|
2020-11-18 09:16:51 +00:00
|
|
|
func OneToOneFromPublicKey(pk *ecdsa.PublicKey, timesource common.TimeSource) *Chat {
|
2020-01-10 18:59:01 +00:00
|
|
|
chatID := types.EncodeHex(crypto.FromECDSAPub(pk))
|
2020-01-20 16:44:32 +00:00
|
|
|
newChat := CreateOneToOneChat(chatID[:8], pk, timesource)
|
2020-01-10 18:59:01 +00:00
|
|
|
|
2021-01-11 10:32:51 +00:00
|
|
|
return newChat
|
2020-01-10 18:59:01 +00:00
|
|
|
}
|
|
|
|
|
2021-01-11 10:32:51 +00:00
|
|
|
func CreateOneToOneChat(name string, publicKey *ecdsa.PublicKey, timesource common.TimeSource) *Chat {
|
2021-10-12 10:33:32 +00:00
|
|
|
timestamp := timesource.GetCurrentTime()
|
2021-01-11 10:32:51 +00:00
|
|
|
return &Chat{
|
2021-10-12 10:33:32 +00:00
|
|
|
ID: oneToOneChatID(publicKey),
|
|
|
|
Name: name,
|
|
|
|
Timestamp: int64(timestamp),
|
|
|
|
ReadMessagesAtClockValue: 0,
|
|
|
|
Active: true,
|
|
|
|
Joined: int64(timestamp),
|
|
|
|
ChatType: ChatTypeOneToOne,
|
|
|
|
Highlight: true,
|
2019-09-26 07:01:17 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2021-01-11 10:32:51 +00:00
|
|
|
func CreateCommunityChat(orgID, chatID string, orgChat *protobuf.CommunityChat, timesource common.TimeSource) *Chat {
|
2020-11-18 09:16:51 +00:00
|
|
|
color := orgChat.Identity.Color
|
|
|
|
if color == "" {
|
2020-12-28 09:09:45 +00:00
|
|
|
color = chatColors[rand.Intn(len(chatColors))] // nolint: gosec
|
2020-11-18 09:16:51 +00:00
|
|
|
}
|
|
|
|
|
2021-10-12 10:33:32 +00:00
|
|
|
timestamp := timesource.GetCurrentTime()
|
2021-01-11 10:32:51 +00:00
|
|
|
return &Chat{
|
2021-10-12 10:33:32 +00:00
|
|
|
CommunityID: orgID,
|
|
|
|
CategoryID: orgChat.CategoryId,
|
|
|
|
Name: orgChat.Identity.DisplayName,
|
|
|
|
Description: orgChat.Identity.Description,
|
|
|
|
Active: true,
|
|
|
|
Color: color,
|
|
|
|
Emoji: orgChat.Identity.Emoji,
|
|
|
|
ID: orgID + chatID,
|
|
|
|
Timestamp: int64(timestamp),
|
|
|
|
Joined: int64(timestamp),
|
|
|
|
ReadMessagesAtClockValue: 0,
|
|
|
|
ChatType: ChatTypeCommunityChat,
|
2020-11-18 09:16:51 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2021-03-31 16:23:45 +00:00
|
|
|
func (c *Chat) DeepLink() string {
|
|
|
|
if c.OneToOne() {
|
|
|
|
return "status-im://p/" + c.ID
|
|
|
|
}
|
|
|
|
if c.PrivateGroupChat() {
|
|
|
|
return "status-im://g/args?a2=" + c.ID
|
|
|
|
}
|
|
|
|
|
|
|
|
if c.CommunityChat() {
|
|
|
|
return "status-im://cc/" + c.ID
|
|
|
|
}
|
|
|
|
|
|
|
|
if c.Public() {
|
|
|
|
return "status-im://" + c.ID
|
|
|
|
}
|
|
|
|
|
|
|
|
return ""
|
|
|
|
}
|
|
|
|
|
2021-01-11 10:32:51 +00:00
|
|
|
func CreateCommunityChats(org *communities.Community, timesource common.TimeSource) []*Chat {
|
|
|
|
var chats []*Chat
|
2020-11-18 09:16:51 +00:00
|
|
|
orgID := org.IDString()
|
|
|
|
|
|
|
|
for chatID, chat := range org.Chats() {
|
|
|
|
chats = append(chats, CreateCommunityChat(orgID, chatID, chat, timesource))
|
|
|
|
}
|
|
|
|
return chats
|
|
|
|
}
|
|
|
|
|
2021-01-11 10:32:51 +00:00
|
|
|
func CreatePublicChat(name string, timesource common.TimeSource) *Chat {
|
2021-10-12 10:33:32 +00:00
|
|
|
timestamp := timesource.GetCurrentTime()
|
2021-01-11 10:32:51 +00:00
|
|
|
return &Chat{
|
2021-10-12 10:33:32 +00:00
|
|
|
ID: name,
|
|
|
|
Name: name,
|
|
|
|
Active: true,
|
|
|
|
Timestamp: int64(timestamp),
|
|
|
|
Joined: int64(timestamp),
|
|
|
|
ReadMessagesAtClockValue: 0,
|
|
|
|
Color: chatColors[rand.Intn(len(chatColors))], // nolint: gosec
|
|
|
|
ChatType: ChatTypePublic,
|
2019-09-26 07:01:17 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2020-12-22 10:49:25 +00:00
|
|
|
func buildProfileChatID(publicKeyString string) string {
|
|
|
|
return "@" + publicKeyString
|
|
|
|
}
|
|
|
|
|
2021-03-25 15:15:22 +00:00
|
|
|
func CreateProfileChat(pubkey string, timesource common.TimeSource) *Chat {
|
|
|
|
|
|
|
|
id := buildProfileChatID(pubkey)
|
2021-01-11 10:32:51 +00:00
|
|
|
return &Chat{
|
2020-12-22 10:49:25 +00:00
|
|
|
ID: id,
|
|
|
|
Name: id,
|
2020-10-20 15:10:28 +00:00
|
|
|
Active: true,
|
|
|
|
Timestamp: int64(timesource.GetCurrentTime()),
|
2021-05-14 10:55:42 +00:00
|
|
|
Joined: int64(timesource.GetCurrentTime()),
|
2020-12-28 09:09:45 +00:00
|
|
|
Color: chatColors[rand.Intn(len(chatColors))], // nolint: gosec
|
2020-10-20 15:10:28 +00:00
|
|
|
ChatType: ChatTypeProfile,
|
2021-03-25 15:15:22 +00:00
|
|
|
Profile: pubkey,
|
2020-10-20 15:10:28 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2020-11-18 09:16:51 +00:00
|
|
|
func CreateGroupChat(timesource common.TimeSource) Chat {
|
2021-05-24 08:27:56 +00:00
|
|
|
timestamp := timesource.GetCurrentTime()
|
|
|
|
synced := uint32(timestamp / 1000)
|
|
|
|
|
2019-10-09 14:22:53 +00:00
|
|
|
return Chat{
|
2021-10-12 10:33:32 +00:00
|
|
|
Active: true,
|
|
|
|
Color: chatColors[rand.Intn(len(chatColors))], // nolint: gosec
|
|
|
|
Timestamp: int64(timestamp),
|
|
|
|
ReadMessagesAtClockValue: 0,
|
|
|
|
SyncedTo: synced,
|
|
|
|
SyncedFrom: synced,
|
|
|
|
ChatType: ChatTypePrivateGroupChat,
|
|
|
|
Highlight: true,
|
2019-10-09 14:22:53 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2021-03-25 15:15:22 +00:00
|
|
|
func CreateTimelineChat(timesource common.TimeSource) *Chat {
|
|
|
|
return &Chat{
|
|
|
|
ID: timelineChatID,
|
|
|
|
Name: "#" + timelineChatID,
|
|
|
|
Timestamp: int64(timesource.GetCurrentTime()),
|
|
|
|
Active: true,
|
|
|
|
ChatType: ChatTypeTimeline,
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2020-11-18 09:16:51 +00:00
|
|
|
func stringSliceToPublicKeys(slice []string) ([]*ecdsa.PublicKey, error) {
|
2019-10-14 14:10:48 +00:00
|
|
|
result := make([]*ecdsa.PublicKey, len(slice))
|
|
|
|
for idx, item := range slice {
|
2020-11-18 09:16:51 +00:00
|
|
|
var err error
|
|
|
|
result[idx], err = common.HexToPubkey(item)
|
2019-10-14 14:10:48 +00:00
|
|
|
if err != nil {
|
|
|
|
return nil, err
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return result, nil
|
|
|
|
}
|
|
|
|
|
|
|
|
func stringSliceContains(slice []string, item string) bool {
|
|
|
|
for _, s := range slice {
|
|
|
|
if s == item {
|
|
|
|
return true
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return false
|
|
|
|
}
|