9c568c58cf
As part of the new Discord <-> Status Community Import functionality, we're adding an API that extracts all discord categories and channels from a previously exported discord export file. These APIs can be used in clients to show the user what categories and channels will be imported later on. There are two APIs: 1. `Messenger.ExtractDiscordCategoriesAndChannels(filesToimport []string) (*MessengerResponse, map[string]*discord.ImportError)` This takes a list of exported discord export (JSON) files (typically one per channel), reads them, and extracts the categories and channels into dedicated data structures (`[]DiscordChannel` and `[]DiscordCategory`) It also returns the oldest message timestamp found in all extracted channels. The API is synchronous and returns the extracted data as a `*MessengerResponse`. This allows to make the API available status-go's RPC interface. The error case is a `map[string]*discord.ImportError` where each key is a file path of a JSON file that we tried to extract data from, and the value a `discord.ImportError` which holds an error message and an error code, allowing for distinguishing between "critical" errors and "non-critical" errors. 2. `Messenger.RequestExtractDiscordCategoriesAndChannels(filesToImport []string)` This is the asynchronous counterpart to `ExtractDiscordCategoriesAndChannels`. The reason this API has been added is because discord servers can have a lot of message and channel data, which causes `ExtractDiscordCategoriesAndChannels` to block the thread for too long, making apps potentially feel like they are stuck. This API runs inside a go routine, eventually calls `ExtractDiscordCategoriesAndChannels`, and then emits a newly introduced `DiscordCategoriesAndChannelsExtractedSignal` that clients can react to. Failure of extraction has to be determined by the `discord.ImportErrors` emitted by the signal. **A note about exported discord history files** We expect users to export their discord histories via the [DiscordChatExporter](https://github.com/Tyrrrz/DiscordChatExporter/wiki/GUI%2C-CLI-and-Formats-explained#exportguild) tool. The tool allows to export the data in different formats, such as JSON, HTML and CSV. We expect users to have their data exported as JSON. Closes: https://github.com/status-im/status-desktop/issues/6690
protocol/encryption package
Hash ratchet encryption
encryptor.GenerateHashRatchetKey() generates a hash ratchet key and stores it in in the DB.
There, 2 new tables are created: hash_ratchet_encryption and hash_ratchet_encryption_cache.
Each hash ratchet key is uniquely identified by the (groupId, keyId) pair, where keyId is derived from a clock value.
protocol.BuildHashRatchetKeyExchangeMessage builds an 1-on-1 message containing the hash ratchet key, given it's ID.
protocol.BuildHashRatchetMessage builds a hash ratchet message with arbitrary payload, given groupId. It will use the latest hash ratchet key available. encryptor.encryptWithHR encrypts the payload using Hash Ratchet algorithms. Intermediate hashes are stored in hash_ratchet_encryption_cache table.
protocol.HandleMessage uses encryptor.decryptWithHR fn for decryption.