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70 lines
1.8 KiB
Elm
70 lines
1.8 KiB
Elm
module Timestamps exposing (Timestamps, data, format)
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import DataSource exposing (DataSource)
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import DataSource.Port
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import DateFormat
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import Json.Encode
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import List.Extra
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import OptimizedDecoder as Decode exposing (Decoder)
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import Result.Extra
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import Time
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type alias Timestamps =
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{ updated : Time.Posix
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, created : Time.Posix
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}
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data : String -> DataSource Timestamps
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data filePath =
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DataSource.Port.get "gitTimestamps"
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(Json.Encode.string filePath)
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(Decode.string
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|> Decode.map (String.trim >> String.split "\n")
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|> Decode.map (List.map secondsStringToPosix)
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|> Decode.map Result.Extra.combine
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|> Decode.map
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(Result.withDefault
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[ Time.millisToPosix 0
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, Time.millisToPosix 0
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]
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)
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|> Decode.map (firstAndLast Timestamps >> Result.fromMaybe "Error")
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|> Decode.andThen Decode.fromResult
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)
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firstAndLast : (a -> a -> b) -> List a -> Maybe b
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firstAndLast constructor list =
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Maybe.map2 constructor
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(List.head list)
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(List.Extra.last list)
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secondsStringToPosix : String -> Result String Time.Posix
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secondsStringToPosix posixTime =
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posixTime
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|> String.trim
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|> String.toInt
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|> Maybe.map (\unixTimeInSeconds -> (unixTimeInSeconds * 1000) |> Time.millisToPosix)
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|> Result.fromMaybe "Expected int"
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format : Time.Posix -> String
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format posix =
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DateFormat.format
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[ DateFormat.monthNameFull
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, DateFormat.text " "
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, DateFormat.dayOfMonthNumber
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, DateFormat.text ", "
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, DateFormat.yearNumber
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]
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pacificZone
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posix
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pacificZone : Time.Zone
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pacificZone =
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Time.customZone (-60 * 7) []
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