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Main.elm
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Main.elm
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port module Main exposing (Effect(..), Model, Msg(..), init, main, update, view)
import Accessibility.Styled as Html exposing (Attribute, Html)
import Accessibility.Styled.Style exposing (invisible)
import Browser
import Browser.Dom as Dom
import Browser.Navigation as Navigation
import Content exposing (Content)
import Css
import Css.Global
import Css.Reset
import Database exposing (Database)
import Database.ID as ID exposing (ID)
import Database.Sync as Sync exposing (Sync)
import Html.Styled as Inaccessible
import Html.Styled.Attributes as Attrs exposing (css)
import Html.Styled.Events as Events
import Html.Styled.Events.Extra exposing (onClickPreventDefaultForLinkWithHref)
import Json.Decode as Decode exposing (Decoder, Value)
import Maybe.Extra
import Node exposing (Node)
import Random
import Route exposing (Route)
import Selection exposing (Selection)
import Settings exposing (Settings)
import Task
import Time exposing (Posix)
import Url exposing (Url)
import Widgets.Button as Button
import Widgets.Colors as Colors
import Widgets.Icons as Icons
import Widgets.Text as Text
import Widgets.TimeDifference as TimeDifference
type alias Model key =
{ database : Database
, url : Url
, key : key
, route : Route
, currentTime : Posix
, settings : Settings
-- view state
, editing : Maybe Editing
, selection : Maybe Selection
, draftSync : Maybe Sync
}
type alias Editing =
{ id : ID
, input : Result ( String, List String ) Content
, selection : { start : Int, end : Int }
}
init : Value -> Url -> key -> ( Model key, Effect )
init flags url key =
let
{ seed, documents, now, settings } =
case Decode.decodeValue flagsDecoder flags of
Ok stuff ->
stuff
Err err ->
Debug.todo (Debug.toString err)
( model, routingEffects ) =
update
(UrlChanged url)
{ database = Database.load seed documents
, url = url
, key = key
, route = Route.Root
, currentTime = now
, settings = settings
-- view state
, editing = Nothing
, selection = Nothing
, draftSync = Nothing
}
in
( model, routingEffects )
flagsDecoder :
Decoder
{ now : Posix
, seed : Random.Seed
, documents : List Database.Document
, settings : Settings
}
flagsDecoder =
Decode.map3
(\millis documents settings ->
{ now = Time.millisToPosix millis
, seed = Random.initialSeed millis
, documents = documents
, settings = settings
}
)
(Decode.field "now" Decode.int)
(Decode.field "documents" (Decode.list (Decode.field "doc" Database.decoder)))
(Decode.field "settings"
(Decode.nullable Settings.decoder
|> Decode.map (Maybe.withDefault Settings.init)
)
)
type Msg
= ClickedLink Browser.UrlRequest
| UrlChanged Url
| GotCurrentTime Posix
| PouchDBPutSuccessfully Value
| TimerTriggeredSave
| FocusedOnEditor
| UserClickedNewNote
| UserEditedNode String
| UserFinishedEditing
| UserHitEnterOnNode
| UserSelectedNoteInList ID
| UserWantsToEditNode ID
| UserWantsToIndentNode
| UserWantsToDedentNode
| UserHitBackspaceAtBeginningOfNode
| UserWantsToMoveNodeUp
| UserWantsToMoveNodeDown
| UserChangedSelection { start : Int, end : Int }
| UserWantsToCreateNewSync
-- workarounds for elm-program-test issues
| UserWantsToOpenNoteWithTitle Content
| UserWantsToNavigate Route
-- draft sync form
| UserTypedInDraftSyncDatabaseField String
| UserTypedInDraftSyncHostField String
| UserTypedInDraftSyncPasswordField String
| UserTypedInDraftSyncUsernameField String
| UserSubmittedSyncForm
| UserWantsToDeleteSync Sync
type Effect
= NoEffect
| Batch (List Effect)
| LoadUrl String
| PushUrl Route
| ReplaceUrl Route
| Put Value
| FocusOnEditor
type UpdatedRevision
= ForSettings
| ForRow ID
update : Msg -> Model key -> ( Model key, Effect )
update msg model =
case msg of
ClickedLink (Browser.Internal url) ->
( model, PushUrl (Route.parse url) )
ClickedLink (Browser.External url) ->
( model, LoadUrl url )
UrlChanged url ->
case Route.parse url of
Route.NodeByTitle content ->
let
( id, database ) =
findOrCreateNoteWithTitle model.currentTime content model.database
in
( { model | database = database }
, ReplaceUrl (Route.NodeById id)
)
route ->
( { model | route = route }
, NoEffect
)
UserWantsToNavigate route ->
( model
, PushUrl route
)
GotCurrentTime now ->
( { model | currentTime = now }
, NoEffect
)
PouchDBPutSuccessfully value ->
let
decoder =
Decode.map2 Tuple.pair
(Decode.field "id"
(Decode.oneOf
[ Decode.map ForRow ID.decoder
, Decode.map (\_ -> ForSettings) Settings.idDecoder
]
)
)
(Decode.field "rev" Decode.string)
in
case Decode.decodeValue decoder value of
Ok ( ForRow id, rev ) ->
( { model | database = Database.updateRevision id rev model.database }
, NoEffect
)
Ok ( ForSettings, rev ) ->
( { model | settings = Settings.updateRevision rev model.settings }
, NoEffect
)
Err err ->
Debug.todo (Debug.toString err)
TimerTriggeredSave ->
let
( rows, database ) =
Database.toPersist model.database
in
( { model | database = database }
, Batch (List.map (Put << Database.encode) rows)
)
FocusedOnEditor ->
( model, NoEffect )
UserClickedNewNote ->
let
( row, database ) =
Database.insert model.currentTime (Node.title Content.empty) model.database
in
( { model
| database = database
, editing =
Just
{ id = row.id
, input = Ok Content.empty
, selection = { start = 0, end = 0 }
}
}
, Batch
[ PushUrl (Route.NodeById row.id)
, FocusOnEditor
]
)
UserEditedNode input ->
case model.editing of
Nothing ->
( model
, NoEffect
)
Just editing ->
case Content.fromString input of
Ok content ->
( { model
| editing = Just { editing | input = Ok content }
, database = Database.update model.currentTime editing.id (Node.setContent content) model.database
}
, NoEffect
)
Err problems ->
( { model | editing = Just { editing | input = Err ( input, problems ) } }
, NoEffect
)
UserFinishedEditing ->
case Maybe.map .input model.editing of
Just (Ok _) ->
( { model | editing = Nothing }
, NoEffect
)
_ ->
( model
, NoEffect
)
UserHitEnterOnNode ->
case
Maybe.map2 Tuple.pair
model.editing
(Maybe.andThen (\editing -> Database.get editing.id model.database) model.editing)
of
Just ( editing, row ) ->
let
( leftContent, rightContent ) =
-- demeter chain?
Content.splitAt editing.selection.start (Node.content row.node)
( newNode, inserted ) =
model.database
|> Database.update model.currentTime row.id (Node.setContent leftContent)
|> Database.insert model.currentTime (Node.node rightContent)
database =
if Node.isTitle row.node then
Database.moveInto row.id newNode.id inserted
else
Database.moveAfter row.id newNode.id inserted
in
( { model
| editing =
Just
{ id = newNode.id
, input = Ok (Node.content newNode.node)
, selection = { start = 0, end = 0 }
}
, database = database
}
, FocusOnEditor
)
Nothing ->
( model
, NoEffect
)
UserSelectedNoteInList id ->
( model
, PushUrl (Route.NodeById id)
)
UserWantsToEditNode id ->
case Database.get id model.database of
Just row ->
( { model
| editing =
Just
{ id = id
, input = Ok (Node.content row.node)
, selection = { start = 0, end = 0 }
}
}
, FocusOnEditor
)
Nothing ->
( model
, NoEffect
)
UserWantsToIndentNode ->
let
current =
Maybe.map .id model.editing
newParent =
current
|> Maybe.andThen (\id -> Database.previousSibling id model.database)
|> Maybe.andThen (\id -> Database.get id model.database)
in
case Maybe.map2 Tuple.pair current newParent of
Just ( id, parent ) ->
( { model
| database =
case List.reverse parent.children of
lastChild :: _ ->
Database.moveAfter lastChild id model.database
[] ->
Database.moveInto parent.id id model.database
}
, FocusOnEditor
)
Nothing ->
( model
, NoEffect
)
UserWantsToDedentNode ->
let
current =
Maybe.map .id model.editing
newParent =
current
|> Maybe.andThen (\id -> Database.get id model.database)
|> Maybe.andThen .parent
|> Maybe.andThen (\id -> Database.get id model.database)
|> Maybe.andThen
(\parent ->
if Node.isTitle parent.node then
Nothing
else
Just parent
)
in
case Maybe.map2 Tuple.pair current newParent of
Just ( id, parent ) ->
( { model | database = Database.moveAfter parent.id id model.database }
, FocusOnEditor
)
Nothing ->
( model, NoEffect )
UserHitBackspaceAtBeginningOfNode ->
let
maybeRow =
Maybe.andThen (\{ id } -> Database.get id model.database) model.editing
maybeTarget =
Maybe.Extra.orListLazy
[ \_ -> Maybe.andThen (\{ id } -> Database.previousSibling id model.database) maybeRow
, \_ -> Maybe.andThen .parent maybeRow
]
|> Maybe.andThen (\id -> Database.get id model.database)
in
case Maybe.map2 Tuple.pair maybeRow maybeTarget of
Just ( row, target ) ->
let
updatedContent =
Content.append (Node.content target.node) (Node.content row.node)
in
( { model
| database =
model.database
|> Database.update model.currentTime target.id (Node.setContent updatedContent)
|> Database.delete row.id
, editing =
Just
{ id = target.id
, input = Ok updatedContent
, selection = { start = 0, end = 0 }
}
}
, FocusOnEditor
)
Nothing ->
( model, NoEffect )
UserWantsToMoveNodeUp ->
let
maybeTarget =
Maybe.Extra.orListLazy
[ \_ ->
model.editing
|> Maybe.andThen (\{ id } -> Database.previousSibling id model.database)
, \_ ->
model.editing
|> Maybe.andThen (\{ id } -> Database.get id model.database)
|> Maybe.andThen .parent
]
in
case Maybe.map2 Tuple.pair model.editing maybeTarget of
Just ( { id }, target ) ->
( { model | database = Database.moveBefore target id model.database }
, FocusOnEditor
)
Nothing ->
( model, NoEffect )
UserWantsToMoveNodeDown ->
let
maybeTarget =
Maybe.Extra.orListLazy
[ \_ ->
model.editing
|> Maybe.andThen (\{ id } -> Database.nextSibling id model.database)
, \_ ->
model.editing
|> Maybe.andThen (\{ id } -> Database.get id model.database)
|> Maybe.andThen .parent
|> Maybe.andThen (\id -> Database.nextSibling id model.database)
]
in
case Maybe.map2 Tuple.pair model.editing maybeTarget of
Just ( { id }, target ) ->
( { model | database = Database.moveAfter target id model.database }
, FocusOnEditor
)
Nothing ->
( model, NoEffect )
UserChangedSelection selection ->
( { model
| editing =
Maybe.map
(\editing -> { editing | selection = selection })
model.editing
}
, NoEffect
)
UserWantsToOpenNoteWithTitle content ->
let
( id, database ) =
findOrCreateNoteWithTitle model.currentTime content model.database
in
( { model | database = database }
, PushUrl (Route.NodeById id)
)
UserWantsToCreateNewSync ->
( { model | draftSync = Just (Sync "" "" "" "") }
, NoEffect
)
UserTypedInDraftSyncDatabaseField database ->
( { model | draftSync = Maybe.map (\draftSync -> { draftSync | database = database }) model.draftSync }
, NoEffect
)
UserTypedInDraftSyncHostField host ->
( { model | draftSync = Maybe.map (\draftSync -> { draftSync | host = host }) model.draftSync }
, NoEffect
)
UserTypedInDraftSyncPasswordField password ->
( { model | draftSync = Maybe.map (\draftSync -> { draftSync | password = password }) model.draftSync }
, NoEffect
)
UserTypedInDraftSyncUsernameField username ->
( { model | draftSync = Maybe.map (\draftSync -> { draftSync | username = username }) model.draftSync }
, NoEffect
)
UserSubmittedSyncForm ->
case model.draftSync of
Just draftSync ->
if Sync.isValid draftSync then
let
newSettings =
Settings.insertSync draftSync model.settings
in
( { model | draftSync = Nothing, settings = newSettings }
, Put (Settings.encode newSettings)
)
else
( model, NoEffect )
Nothing ->
( model, NoEffect )
UserWantsToDeleteSync sync ->
let
newSettings =
Settings.removeSync sync model.settings
in
( { model | settings = newSettings }
, Put (Settings.encode newSettings)
)
{-| TODO: should this go in Database?
-}
findOrCreateNoteWithTitle : Posix -> Content -> Database -> ( ID, Database )
findOrCreateNoteWithTitle now content database =
case Database.filter (\node -> Node.content node == content) database of
title :: _ ->
( title.id
, database
)
[] ->
Database.insert now (Node.title content) database
|> Tuple.mapFirst .id
perform : Model Navigation.Key -> Effect -> Cmd Msg
perform model effect =
case effect of
NoEffect ->
Cmd.none
Batch effects ->
Cmd.batch (List.map (perform model) effects)
LoadUrl url ->
Navigation.load url
PushUrl route ->
if model.route == route then
Cmd.none
else
Navigation.pushUrl model.key (Route.toString route)
ReplaceUrl route ->
if model.route == route then
Cmd.none
else
Navigation.replaceUrl model.key (Route.toString route)
Put value ->
put value
FocusOnEditor ->
Task.attempt
(\_ -> FocusedOnEditor)
(Dom.focus "editor")
port put : Value -> Cmd msg
port putSuccessfully : (Value -> msg) -> Sub msg
subscriptions : Model key -> Sub Msg
subscriptions model =
Sub.batch
[ putSuccessfully PouchDBPutSuccessfully
, Time.every 1000 (\_ -> TimerTriggeredSave)
-- Using a 1-second resolution is more than enough for most UI
-- concerns. If it needs to be more precise, crank this down! But
-- remember aware that it'll be a lot of updates and not precise ticks.
, Time.every 1000 GotCurrentTime
]
view : Model key -> Browser.Document Msg
view model =
{ title = "Notes"
, body =
List.map Html.toUnstyled
[ Css.Reset.meyerV2
, Css.Reset.borderBoxV201408
, Css.Global.global
[ Css.Global.body
[ Css.backgroundColor (Colors.toCss Colors.whiteLightest)
, Css.color (Colors.toCss Colors.blackDark)
]
]
, viewApplication model
]
}
viewApplication : Model key -> Html Msg
viewApplication model =
Html.main_
[ css
[ Css.property "display" "grid"
, Css.property "grid-template-columns" "350px 1fr"
, Css.property "grid-template-rows" "auto 1fr auto"
, Css.property "grid-template-areas" "\"header .\" \"list note\" \"sync note\""
, Css.property "grid-column-gap" "10px"
, Css.height (Css.vh 100)
, Css.width (Css.pct 100)
]
]
[ viewHeader [ css [ Css.property "grid-area" "header" ] ]
, viewNav [ css [ Css.property "grid-area" "list" ] ]
(case model.route of
Route.NodeById id ->
Just id
_ ->
Nothing
)
model.currentTime
(Database.filter Node.isTitle model.database)
, viewSync [ css [ Css.property "grid-area" "sync" ] ]
, Html.div [ css [ Css.property "grid-area" "note" ] ]
[ case model.route of
Route.NotFound ->
Html.text "Not found!"
Route.Root ->
Html.text "Select or create a note!"
Route.NodeById id ->
viewRow id model
Route.NodeByTitle _ ->
Html.text "You shouldn't ever see this page!"
Route.SyncSettings ->
viewSyncSettingsPage model
]
]
viewHeader : List (Attribute Never) -> Html Msg
viewHeader attrs =
Html.header
(Attrs.css
[ Css.borderBottom3 (Css.px 1) Css.solid (Colors.toCss Colors.greyLight)
, Css.borderRight3 (Css.px 1) Css.solid (Colors.toCss Colors.greyLight)
]
:: attrs
)
[ Button.button (Button.OnClick UserClickedNewNote)
[ Button.transparent
, Button.css
[ Css.padding (Css.px 12)
, Css.cursor Css.pointer
]
]
[ Icons.chick
{ height = 30
, shell = Colors.greyDark
, chick = Colors.yellowDark
}
, Html.span invisible [ Html.text "New Note" ]
]
]
viewNav : List (Attribute Never) -> Maybe ID -> Posix -> List Database.Row -> Html Msg
viewNav attrs activeId now rows =
Html.nav
(Attrs.css
[ Css.height (Css.pct 100)
, Css.borderRight3 (Css.px 1) Css.solid (Colors.toCss Colors.greyLight)
, Css.overflowY Css.scroll
, Css.overflowX Css.hidden
]
:: attrs
)
[ rows
|> List.sortBy (\row -> -(Time.posixToMillis row.updated))
|> List.map (\row -> Html.li [] [ viewNavLink activeId now row ])
|> Html.ul []
]
viewSync : List (Attribute Never) -> Html Msg
viewSync attrs =
Html.div attrs
[ Inaccessible.a
[ Attrs.href (Route.toString Route.SyncSettings)
, onClickPreventDefaultForLinkWithHref (UserWantsToNavigate Route.SyncSettings)
]
[ Html.text "Sync" ]
]
viewSyncSettingsPage : Model key -> Html Msg
viewSyncSettingsPage model =
-- TODO: pull this out to a widget and remove the duplication
Html.section
[ Attrs.css
[ Css.maxWidth (Css.em 40)
, Css.padding2 Css.zero (Css.px 27)
, Css.margin2 Css.zero Css.auto
]
]
[ Html.h1 [ Attrs.css [ Text.h1 ] ] [ Html.text "Sync Settings" ]
, case model.draftSync of
Just draftSync ->
-- TODO: extract this all to a widget
let
field onInput label value =
Html.labelBefore
[ Attrs.css
[ Text.text
, Css.display Css.tableRow
]
]
(Html.span [ Attrs.css [ Css.display Css.tableCell ] ] [ Html.text label ])
(Html.inputText label
[ Attrs.value value
, Events.onInput onInput
, Attrs.css [ Css.display Css.tableCell ]
]
)
in
-- using onSubmit as a hook here since hitting enter needs to work
Inaccessible.form
[ Events.onSubmit UserSubmittedSyncForm
, Attrs.css
[ Css.display Css.table
, Css.margin2 (Css.px 27) Css.zero
]
]
[ field UserTypedInDraftSyncHostField "Host" draftSync.host
, field UserTypedInDraftSyncDatabaseField "Database" draftSync.database
, field UserTypedInDraftSyncUsernameField "Username" draftSync.username
, field UserTypedInDraftSyncPasswordField "Password" draftSync.password
, Button.button
Button.Submit
[ Button.enabled (Sync.isValid draftSync) ]
[ Html.text "Start Syncing" ]
]
Nothing ->
Button.button (Button.OnClick UserWantsToCreateNewSync)
[ Button.css [ Css.margin2 (Css.px 27) Css.zero ] ]
[ Html.text "Sync with a new CouchDB Server" ]
, let
th =
Attrs.css
[ Text.text
, Css.fontWeight Css.bold
, Css.textAlign Css.left
]
cell =
Attrs.css
[ Text.text
, Css.padding (Css.px 5)
]
in
Html.table
[ Attrs.css [ Css.width (Css.pct 100) ] ]
[ Html.thead []
[ Html.tr []
[ Html.th [ th ] [ Html.text "Host" ]
, Html.th [ th ] [ Html.text "Database" ]
, Html.th [ th ] [ Html.text "Username" ]
, Html.th [ th ] [ Html.text "Password" ]
, Html.th [] []
]
]
, Html.tbody []
(List.map
(\sync ->
Html.tr []
[ Html.td [ cell ] [ Html.text sync.host ]
, Html.td [ cell ] [ Html.text sync.database ]
, Html.td [ cell ] [ Html.text sync.username ]
, Html.td [ cell ]
[ if sync.password /= "" then
Html.text "*****"
else
Html.text ""
]
, Html.td []
[ Button.button
(Button.OnClick (UserWantsToDeleteSync sync))
[ Button.delete ]
[ Html.text "Delete" ]
]
]
)
model.settings.syncs
)
]
]
viewNavLink : Maybe ID -> Posix -> Database.Row -> Html Msg
viewNavLink activeId now { id, node, updated } =
Button.button
(Button.OnClick (UserSelectedNoteInList id))
[ Button.transparent
, Button.css [ Css.width (Css.pct 100) ]
]
[ -- Safari doesn't let you make a button a grid container. Boo.
Html.div
[ Attrs.css
[ Css.padding (Css.px 12)
, Css.width (Css.pct 100)
-- it's always text!
, Text.text
-- content layout
, Css.property "display" "grid"
, Css.property "grid-template-columns" "15% 1fr"
, Css.property "grid-template-rows" "auto"
, Css.property "grid-template-areas" "\"date title\""
, Css.property "grid-column-gap" "10px"
-- surround by borders
, Css.borderBottom3 (Css.px 1) Css.solid (Colors.toCss Colors.greyLight)
, Css.borderLeft3 (Css.px 8) Css.solid Css.transparent
, Css.property "transition" "all 0.25s"
-- you can click on this!
, Css.cursor Css.pointer
-- highlight the active node
, -- TODO: make an isActive helper that checks if a child is active too
if activeId == Just id then
Css.batch
[ Css.borderLeftColor (Colors.toCss Colors.greenLight)
, Css.backgroundColor (Colors.toCss Colors.whiteLight)
]
else
Css.batch []
]
]
[ Html.div
[ css [ Css.property "grid-area" "date" ] ]
[ TimeDifference.compact updated now ]
, Content.toHtml
{ activate = Nothing
, navigate = UserWantsToOpenNoteWithTitle
, navigateUrl = Route.toString << Route.NodeByTitle
}
[ css
[ Css.property "grid-area" "title"
, Css.textAlign Css.left
, Css.height (Css.calc Text.textLineHeight Css.plus Text.textLineHeight)
, Css.property "display" "-webkit-box"
, Css.property "-webkit-line-clamp" "2"
, Css.property "-webkit-box-orient" "vertical"
, Css.overflow Css.hidden
]
]
(Node.content node)
]
]
viewRow : ID -> Model key -> Html Msg
viewRow id model =
case Database.get id model.database of
Nothing ->
Html.text "Node not found!"
Just row ->
let
tag =
if Node.isTitle row.node then
-- TODO: pull this out to a widget and remove the duplication
Html.section
[ Attrs.css
[ Css.maxWidth (Css.em 40)
, Css.padding2 Css.zero (Css.px 27)
, Css.margin2 Css.zero Css.auto
]
]
else
Html.li
-- TODO: extract this list item to a widget or something
[ Attrs.css [ Css.pseudoElement "marker" [ Css.color (Colors.toCss Colors.greenDark) ] ] ]
in
tag
[ case model.editing of
Just editing ->
if id == editing.id then
Html.form []
[ Html.textarea
[ Attrs.css
[ if Node.isTitle row.node then
Text.h1
else
Text.text
, Css.width (Css.pct 100)
, Css.border Css.zero
, Css.backgroundColor Css.transparent
, Css.resize Css.none
, Css.height Css.zero
]
, case Maybe.map .input model.editing of
Just (Ok content) ->
Attrs.value (Content.toString content)
Just (Err ( input, _ )) ->
Attrs.value input
-- should not actually be possible; oh well.
Nothing ->
Attrs.value ""
, Attrs.attribute "aria-label" "Content"
, Attrs.id "editor"
, Attrs.attribute "is" "node-input"
, Events.onInput UserEditedNode
, Events.onBlur UserFinishedEditing
, editorKeybindings editing row
, onSelectionChange UserChangedSelection
]
[]
, case Maybe.map .input model.editing of
Just (Err ( _, problems )) ->
Html.ul [] (List.map (\problem -> Html.li [] [ Html.text problem ]) problems)
_ ->
Html.text ""
]
else
viewNode row.id row.node
Nothing ->
viewNode row.id row.node
, if List.isEmpty row.children then
Html.text ""
else
row.children
|> List.map (\child -> viewRow child model)