775 lines
22 KiB
Elm
775 lines
22 KiB
Elm
module Mastodon
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exposing
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( AccessTokenResult
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, Account
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, AppRegistration
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, Attachment
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, Client
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, Error(..)
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, Mention
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, Notification
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, NotificationAggregate
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, Reblog(..)
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, Status
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, StatusRequestBody
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, StreamType(..)
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, Tag
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, WebSocketEvent(..)
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, reblog
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, unreblog
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, favourite
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, unfavourite
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, extractReblog
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, register
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, registrationEncoder
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, aggregateNotifications
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, clientEncoder
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, decodeWebSocketMessage
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, getAuthorizationUrl
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, getAccessToken
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, fetchAccount
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, fetchLocalTimeline
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, fetchNotifications
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, fetchGlobalTimeline
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, fetchUserTimeline
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, postStatus
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, send
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, subscribeToWebSockets
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, notificationDecoder
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, addNotificationToAggregates
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, notificationToAggregate
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)
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import Http
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import HttpBuilder
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import Json.Decode.Pipeline as Pipe
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import Json.Decode as Decode
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import Json.Encode as Encode
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import Util
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import WebSocket
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import List.Extra exposing (groupWhile)
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import Mastodon.ApiUrl as ApiUrl
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-- Types
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type alias AccountId =
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Int
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type alias AuthCode =
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String
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type alias ClientId =
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String
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type alias ClientSecret =
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String
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type alias Server =
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String
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type alias StatusCode =
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Int
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type alias StatusMsg =
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String
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type alias Token =
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String
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type Error
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= MastodonError StatusCode StatusMsg String
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| ServerError StatusCode StatusMsg String
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| TimeoutError
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| NetworkError
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type alias AccessTokenResult =
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{ server : Server
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, accessToken : Token
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}
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type alias Client =
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{ server : Server
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, token : Token
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}
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type alias AppRegistration =
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{ server : Server
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, scope : String
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, client_id : ClientId
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, client_secret : ClientSecret
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, id : Int
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, redirect_uri : String
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}
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type alias Account =
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{ acct : String
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, avatar : String
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, created_at : String
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, display_name : String
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, followers_count : Int
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, following_count : Int
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, header : String
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, id : AccountId
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, locked : Bool
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, note : String
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, statuses_count : Int
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, url : String
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, username : String
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}
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type alias Attachment =
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-- type_: -- "image", "video", "gifv"
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{ id : Int
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, type_ : String
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, url : String
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, remote_url : String
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, preview_url : String
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, text_url : Maybe String
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}
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type alias Mention =
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{ id : AccountId
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, url : String
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, username : String
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, acct : String
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}
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type alias Notification =
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{-
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- id: The notification ID
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- type_: One of: "mention", "reblog", "favourite", "follow"
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- created_at: The time the notification was created
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- account: The Account sending the notification to the user
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- status: The Status associated with the notification, if applicable
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-}
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{ id : Int
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, type_ : String
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, created_at : String
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, account : Account
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, status : Maybe Status
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}
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type alias NotificationAggregate =
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{ type_ : String
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, status : Maybe Status
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, accounts : List Account
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, created_at : String
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}
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type alias Tag =
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{ name : String
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, url : String
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}
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type alias Status =
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{ account : Account
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, content : String
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, created_at : String
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, favourited : Maybe Bool
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, favourites_count : Int
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, id : Int
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, in_reply_to_account_id : Maybe Int
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, in_reply_to_id : Maybe Int
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, media_attachments : List Attachment
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, mentions : List Mention
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, reblog : Maybe Reblog
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, reblogged : Maybe Bool
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, reblogs_count : Int
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, sensitive : Maybe Bool
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, spoiler_text : String
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, tags : List Tag
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, uri : String
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, url : String
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, visibility : String
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}
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type Reblog
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= Reblog Status
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type alias StatusRequestBody =
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-- status: The text of the status
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-- in_reply_to_id: local ID of the status you want to reply to
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-- sensitive: set this to mark the media of the status as NSFW
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-- spoiler_text: text to be shown as a warning before the actual content
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-- visibility: either "direct", "private", "unlisted" or "public"
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-- TODO: media_ids: array of media IDs to attach to the status (maximum 4)
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{ status : String
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, in_reply_to_id : Maybe Int
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, spoiler_text : Maybe String
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, sensitive : Bool
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, visibility : String
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}
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type alias Request a =
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HttpBuilder.RequestBuilder a
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type StreamType
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= UserStream
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| LocalPublicStream
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| GlobalPublicStream
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type WebSocketEvent
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= StatusUpdateEvent (Result String Status)
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| NotificationEvent (Result String Notification)
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| StatusDeleteEvent (Result String Int)
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| ErrorEvent String
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type WebSocketPayload
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= StringPayload String
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| IntPayload Int
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type alias WebSocketMessage =
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{ event : String
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, payload : WebSocketPayload
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}
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-- Encoders
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appRegistrationEncoder : String -> String -> String -> String -> Encode.Value
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appRegistrationEncoder client_name redirect_uris scope website =
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Encode.object
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[ ( "client_name", Encode.string client_name )
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, ( "redirect_uris", Encode.string redirect_uris )
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, ( "scopes", Encode.string scope )
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, ( "website", Encode.string website )
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]
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authorizationCodeEncoder : AppRegistration -> AuthCode -> Encode.Value
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authorizationCodeEncoder registration authCode =
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Encode.object
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[ ( "client_id", Encode.string registration.client_id )
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, ( "client_secret", Encode.string registration.client_secret )
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, ( "grant_type", Encode.string "authorization_code" )
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, ( "redirect_uri", Encode.string registration.redirect_uri )
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, ( "code", Encode.string authCode )
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]
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statusRequestBodyEncoder : StatusRequestBody -> Encode.Value
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statusRequestBodyEncoder statusData =
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Encode.object
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[ ( "status", Encode.string statusData.status )
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, ( "in_reply_to_id", encodeMaybe Encode.int statusData.in_reply_to_id )
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, ( "spoiler_text", encodeMaybe Encode.string statusData.spoiler_text )
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, ( "sensitive", Encode.bool statusData.sensitive )
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, ( "visibility", Encode.string statusData.visibility )
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]
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-- Decoders
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appRegistrationDecoder : Server -> String -> Decode.Decoder AppRegistration
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appRegistrationDecoder server scope =
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Pipe.decode AppRegistration
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|> Pipe.hardcoded server
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|> Pipe.hardcoded scope
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|> Pipe.required "client_id" Decode.string
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|> Pipe.required "client_secret" Decode.string
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|> Pipe.required "id" Decode.int
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|> Pipe.required "redirect_uri" Decode.string
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accessTokenDecoder : AppRegistration -> Decode.Decoder AccessTokenResult
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accessTokenDecoder registration =
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Pipe.decode AccessTokenResult
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|> Pipe.hardcoded registration.server
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|> Pipe.required "access_token" Decode.string
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accountDecoder : Decode.Decoder Account
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accountDecoder =
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Pipe.decode Account
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|> Pipe.required "acct" Decode.string
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|> Pipe.required "avatar" Decode.string
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|> Pipe.required "created_at" Decode.string
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|> Pipe.required "display_name" Decode.string
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|> Pipe.required "followers_count" Decode.int
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|> Pipe.required "following_count" Decode.int
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|> Pipe.required "header" Decode.string
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|> Pipe.required "id" Decode.int
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|> Pipe.required "locked" Decode.bool
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|> Pipe.required "note" Decode.string
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|> Pipe.required "statuses_count" Decode.int
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|> Pipe.required "url" Decode.string
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|> Pipe.required "username" Decode.string
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attachmentDecoder : Decode.Decoder Attachment
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attachmentDecoder =
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Pipe.decode Attachment
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|> Pipe.required "id" Decode.int
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|> Pipe.required "type" Decode.string
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|> Pipe.required "url" Decode.string
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|> Pipe.required "remote_url" Decode.string
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|> Pipe.required "preview_url" Decode.string
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|> Pipe.required "text_url" (Decode.nullable Decode.string)
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mentionDecoder : Decode.Decoder Mention
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mentionDecoder =
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Pipe.decode Mention
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|> Pipe.required "id" Decode.int
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|> Pipe.required "url" Decode.string
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|> Pipe.required "username" Decode.string
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|> Pipe.required "acct" Decode.string
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notificationDecoder : Decode.Decoder Notification
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notificationDecoder =
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Pipe.decode Notification
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|> Pipe.required "id" Decode.int
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|> Pipe.required "type" Decode.string
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|> Pipe.required "created_at" Decode.string
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|> Pipe.required "account" accountDecoder
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|> Pipe.optional "status" (Decode.nullable statusDecoder) Nothing
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tagDecoder : Decode.Decoder Tag
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tagDecoder =
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Pipe.decode Tag
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|> Pipe.required "name" Decode.string
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|> Pipe.required "url" Decode.string
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reblogDecoder : Decode.Decoder Reblog
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reblogDecoder =
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Decode.map Reblog (Decode.lazy (\_ -> statusDecoder))
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statusDecoder : Decode.Decoder Status
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statusDecoder =
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Pipe.decode Status
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|> Pipe.required "account" accountDecoder
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|> Pipe.required "content" Decode.string
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|> Pipe.required "created_at" Decode.string
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|> Pipe.optional "favourited" (Decode.nullable Decode.bool) Nothing
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|> Pipe.required "favourites_count" Decode.int
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|> Pipe.required "id" Decode.int
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|> Pipe.required "in_reply_to_account_id" (Decode.nullable Decode.int)
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|> Pipe.required "in_reply_to_id" (Decode.nullable Decode.int)
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|> Pipe.required "media_attachments" (Decode.list attachmentDecoder)
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|> Pipe.required "mentions" (Decode.list mentionDecoder)
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|> Pipe.optional "reblog" (Decode.nullable reblogDecoder) Nothing
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|> Pipe.optional "reblogged" (Decode.nullable Decode.bool) Nothing
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|> Pipe.required "reblogs_count" Decode.int
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|> Pipe.required "sensitive" (Decode.nullable Decode.bool)
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|> Pipe.required "spoiler_text" Decode.string
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|> Pipe.required "tags" (Decode.list tagDecoder)
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|> Pipe.required "uri" Decode.string
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|> Pipe.required "url" Decode.string
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|> Pipe.required "visibility" Decode.string
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webSocketPayloadDecoder : Decode.Decoder WebSocketPayload
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webSocketPayloadDecoder =
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Decode.oneOf
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[ Decode.map StringPayload Decode.string
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, Decode.map IntPayload Decode.int
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]
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webSocketEventDecoder : Decode.Decoder WebSocketMessage
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webSocketEventDecoder =
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Pipe.decode WebSocketMessage
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|> Pipe.required "event" Decode.string
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|> Pipe.required "payload" webSocketPayloadDecoder
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-- Internal helpers
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encodeMaybe : (a -> Encode.Value) -> Maybe a -> Encode.Value
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encodeMaybe encode thing =
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case thing of
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Nothing ->
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Encode.null
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Just value ->
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encode value
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encodeUrl : String -> List ( String, String ) -> String
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encodeUrl base params =
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List.map (\( k, v ) -> k ++ "=" ++ Http.encodeUri v) params
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|> String.join "&"
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|> (++) (base ++ "?")
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mastodonErrorDecoder : Decode.Decoder String
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mastodonErrorDecoder =
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Decode.field "error" Decode.string
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extractMastodonError : StatusCode -> StatusMsg -> String -> Error
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extractMastodonError statusCode statusMsg body =
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case Decode.decodeString mastodonErrorDecoder body of
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Ok errRecord ->
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MastodonError statusCode statusMsg errRecord
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Err err ->
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ServerError statusCode statusMsg err
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extractError : Http.Error -> Error
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extractError error =
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case error of
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Http.BadStatus { status, body } ->
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extractMastodonError status.code status.message body
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Http.BadPayload str { status } ->
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ServerError
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status.code
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status.message
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("Failed decoding JSON: " ++ str)
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Http.Timeout ->
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TimeoutError
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_ ->
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NetworkError
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extractReblog : Status -> Status
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extractReblog status =
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case status.reblog of
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Just (Reblog reblog) ->
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reblog
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Nothing ->
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status
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toResponse : Result Http.Error a -> Result Error a
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toResponse result =
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Result.mapError extractError result
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fetch : Client -> String -> Decode.Decoder a -> Request a
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fetch client endpoint decoder =
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HttpBuilder.get (client.server ++ endpoint)
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|> HttpBuilder.withHeader "Authorization" ("Bearer " ++ client.token)
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|> HttpBuilder.withExpect (Http.expectJson decoder)
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-- Public API
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notificationToAggregate : Notification -> NotificationAggregate
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notificationToAggregate notification =
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NotificationAggregate
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notification.type_
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notification.status
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[ notification.account ]
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notification.created_at
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addNotificationToAggregates : Notification -> List NotificationAggregate -> List NotificationAggregate
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addNotificationToAggregates notification aggregates =
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let
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addNewAccountToSameStatus : NotificationAggregate -> Notification -> NotificationAggregate
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addNewAccountToSameStatus aggregate notification =
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case ( aggregate.status, notification.status ) of
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( Just aggregateStatus, Just notificationStatus ) ->
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if aggregateStatus.id == notificationStatus.id then
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{ aggregate | accounts = notification.account :: aggregate.accounts }
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else
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aggregate
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( _, _ ) ->
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aggregate
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{-
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Let's try to find an already existing aggregate, matching the notification
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we are trying to add.
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If we find any aggregate, we modify it inplace. If not, we return the
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aggregates unmodified
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-}
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newAggregates =
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aggregates
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|> List.map
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(\aggregate ->
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case ( aggregate.type_, notification.type_ ) of
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{-
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Notification and aggregate are of the follow type.
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Add the new following account.
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-}
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( "follow", "follow" ) ->
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{ aggregate | accounts = notification.account :: aggregate.accounts }
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{-
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Notification is of type follow, but current aggregate
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is of another type. Let's continue then.
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-}
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( _, "follow" ) ->
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aggregate
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{-
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If both types are the same check if we should
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add the new account.
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-}
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( aggregateType, notificationType ) ->
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if aggregateType == notificationType then
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addNewAccountToSameStatus aggregate notification
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else
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aggregate
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)
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in
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{-
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If we did no modification to the old aggregates it's
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because we didn't found any match. So me have to create
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a new aggregate
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-}
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if newAggregates == aggregates then
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notificationToAggregate (notification) :: aggregates
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else
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newAggregates
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aggregateNotifications : List Notification -> List NotificationAggregate
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aggregateNotifications notifications =
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let
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only type_ notifications =
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List.filter (\n -> n.type_ == type_) notifications
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sameStatus n1 n2 =
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case ( n1.status, n2.status ) of
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( Just r1, Just r2 ) ->
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r1.id == r2.id
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_ ->
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False
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extractAggregate statusGroup =
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let
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accounts =
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List.map .account statusGroup
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in
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case statusGroup of
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notification :: _ ->
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[ NotificationAggregate
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notification.type_
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notification.status
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accounts
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notification.created_at
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]
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[] ->
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[]
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aggregate statusGroups =
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List.map extractAggregate statusGroups |> List.concat
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in
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[ notifications |> only "reblog" |> groupWhile sameStatus |> aggregate
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, notifications |> only "favourite" |> groupWhile sameStatus |> aggregate
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, notifications |> only "mention" |> groupWhile sameStatus |> aggregate
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, notifications |> only "follow" |> groupWhile (\_ _ -> True) |> aggregate
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]
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|> List.concat
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|> List.sortBy .created_at
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|> List.reverse
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clientEncoder : Client -> Encode.Value
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clientEncoder client =
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Encode.object
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[ ( "server", Encode.string client.server )
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, ( "token", Encode.string client.token )
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]
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registrationEncoder : AppRegistration -> Encode.Value
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registrationEncoder registration =
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Encode.object
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[ ( "server", Encode.string registration.server )
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, ( "scope", Encode.string registration.scope )
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, ( "client_id", Encode.string registration.client_id )
|
|
, ( "client_secret", Encode.string registration.client_secret )
|
|
, ( "id", Encode.int registration.id )
|
|
, ( "redirect_uri", Encode.string registration.redirect_uri )
|
|
]
|
|
|
|
|
|
register : Server -> String -> String -> String -> String -> Request AppRegistration
|
|
register server client_name redirect_uri scope website =
|
|
HttpBuilder.post (ApiUrl.apps server)
|
|
|> HttpBuilder.withExpect (Http.expectJson (appRegistrationDecoder server scope))
|
|
|> HttpBuilder.withJsonBody (appRegistrationEncoder client_name redirect_uri scope website)
|
|
|
|
|
|
getAuthorizationUrl : AppRegistration -> String
|
|
getAuthorizationUrl registration =
|
|
encodeUrl (ApiUrl.oauthAuthorize registration.server)
|
|
[ ( "response_type", "code" )
|
|
, ( "client_id", registration.client_id )
|
|
, ( "scope", registration.scope )
|
|
, ( "redirect_uri", registration.redirect_uri )
|
|
]
|
|
|
|
|
|
getAccessToken : AppRegistration -> AuthCode -> Request AccessTokenResult
|
|
getAccessToken registration authCode =
|
|
HttpBuilder.post (ApiUrl.oauthToken registration.server)
|
|
|> HttpBuilder.withExpect (Http.expectJson (accessTokenDecoder registration))
|
|
|> HttpBuilder.withJsonBody (authorizationCodeEncoder registration authCode)
|
|
|
|
|
|
send : (Result Error a -> msg) -> Request a -> Cmd msg
|
|
send tagger builder =
|
|
builder |> HttpBuilder.send (toResponse >> tagger)
|
|
|
|
|
|
fetchAccount : Client -> AccountId -> Request Account
|
|
fetchAccount client accountId =
|
|
fetch client (ApiUrl.account accountId) accountDecoder
|
|
|
|
|
|
fetchUserTimeline : Client -> Request (List Status)
|
|
fetchUserTimeline client =
|
|
fetch client ApiUrl.homeTimeline <| Decode.list statusDecoder
|
|
|
|
|
|
fetchLocalTimeline : Client -> Request (List Status)
|
|
fetchLocalTimeline client =
|
|
fetch client (ApiUrl.publicTimeline (Just "public")) <| Decode.list statusDecoder
|
|
|
|
|
|
fetchGlobalTimeline : Client -> Request (List Status)
|
|
fetchGlobalTimeline client =
|
|
fetch client (ApiUrl.publicTimeline (Nothing)) <| Decode.list statusDecoder
|
|
|
|
|
|
fetchNotifications : Client -> Request (List Notification)
|
|
fetchNotifications client =
|
|
fetch client (ApiUrl.notifications) <| Decode.list notificationDecoder
|
|
|
|
|
|
postStatus : Client -> StatusRequestBody -> Request Status
|
|
postStatus client statusRequestBody =
|
|
HttpBuilder.post (ApiUrl.statuses client.server)
|
|
|> HttpBuilder.withHeader "Authorization" ("Bearer " ++ client.token)
|
|
|> HttpBuilder.withExpect (Http.expectJson statusDecoder)
|
|
|> HttpBuilder.withJsonBody (statusRequestBodyEncoder statusRequestBody)
|
|
|
|
|
|
reblog : Client -> Int -> Request Status
|
|
reblog client id =
|
|
HttpBuilder.post (ApiUrl.reblog client.server id)
|
|
|> HttpBuilder.withHeader "Authorization" ("Bearer " ++ client.token)
|
|
|> HttpBuilder.withExpect (Http.expectJson statusDecoder)
|
|
|
|
|
|
unreblog : Client -> Int -> Request Status
|
|
unreblog client id =
|
|
HttpBuilder.post (ApiUrl.unreblog client.server id)
|
|
|> HttpBuilder.withHeader "Authorization" ("Bearer " ++ client.token)
|
|
|> HttpBuilder.withExpect (Http.expectJson statusDecoder)
|
|
|
|
|
|
favourite : Client -> Int -> Request Status
|
|
favourite client id =
|
|
HttpBuilder.post (ApiUrl.favourite client.server id)
|
|
|> HttpBuilder.withHeader "Authorization" ("Bearer " ++ client.token)
|
|
|> HttpBuilder.withExpect (Http.expectJson statusDecoder)
|
|
|
|
|
|
unfavourite : Client -> Int -> Request Status
|
|
unfavourite client id =
|
|
HttpBuilder.post (ApiUrl.unfavourite client.server id)
|
|
|> HttpBuilder.withHeader "Authorization" ("Bearer " ++ client.token)
|
|
|> HttpBuilder.withExpect (Http.expectJson statusDecoder)
|
|
|
|
|
|
subscribeToWebSockets : Client -> StreamType -> (String -> a) -> Sub a
|
|
subscribeToWebSockets client streamType message =
|
|
let
|
|
type_ =
|
|
case streamType of
|
|
GlobalPublicStream ->
|
|
"public"
|
|
|
|
LocalPublicStream ->
|
|
"public:local"
|
|
|
|
UserStream ->
|
|
"user"
|
|
|
|
url =
|
|
encodeUrl
|
|
(ApiUrl.streaming (Util.replace "https:" "wss:" client.server))
|
|
[ ( "access_token", client.token )
|
|
, ( "stream", type_ )
|
|
]
|
|
in
|
|
WebSocket.listen url message
|
|
|
|
|
|
decodeWebSocketMessage : String -> WebSocketEvent
|
|
decodeWebSocketMessage message =
|
|
case (Decode.decodeString webSocketEventDecoder message) of
|
|
Ok message ->
|
|
case message.event of
|
|
"update" ->
|
|
case message.payload of
|
|
StringPayload payload ->
|
|
StatusUpdateEvent (Decode.decodeString statusDecoder payload)
|
|
|
|
_ ->
|
|
ErrorEvent "WS status update event payload must be a string"
|
|
|
|
"delete" ->
|
|
case message.payload of
|
|
IntPayload payload ->
|
|
StatusDeleteEvent <| Ok payload
|
|
|
|
_ ->
|
|
ErrorEvent "WS status delete event payload must be an int"
|
|
|
|
"notification" ->
|
|
case message.payload of
|
|
StringPayload payload ->
|
|
NotificationEvent (Decode.decodeString notificationDecoder payload)
|
|
|
|
_ ->
|
|
ErrorEvent "WS notification event payload must be an string"
|
|
|
|
event ->
|
|
ErrorEvent <| "Unknown WS event " ++ event
|
|
|
|
Err error ->
|
|
ErrorEvent error
|