MapComplete/UI/ImportFlow/Introdution.ts

import Combine from "../Base/Combine"
import { FlowStep } from "./FlowStep"
import { UIEventSource } from "../../Logic/UIEventSource"
import Translations from "../i18n/Translations"
import Title from "../Base/Title"
import { CreateNotes } from "./CreateNotes"
import { FixedUiElement } from "../Base/FixedUiElement"

export default class Introdution extends Combine implements FlowStep<void> {
    readonly IsValid: UIEventSource<boolean>
    readonly Value: UIEventSource<void>

    constructor() {
        const example = CreateNotes.createNoteContentsUi(
            {
                properties: {
                    some_key: "some_value",
                    note: "a note in the original dataset",
                },
                geometry: {
                    coordinates: [3.4, 51.2],
                },
            },
            {
                wikilink:
                    "https://wiki.openstreetmap.org/wiki/Imports/<documentation of your import>",
                intro: "There might be an XYZ here",
                theme: "theme",
                source: "source of the data",
            }
        ).map((el) => (el === "" ? new FixedUiElement("").SetClass("block") : el))

        super([
            new Title(Translations.t.importHelper.introduction.title),
            Translations.t.importHelper.introduction.description,
            Translations.t.importHelper.introduction.importFormat,
            new Combine([new Combine(example).SetClass("flex flex-col")]).SetClass("literal-code"),
        ])
        this.SetClass("flex flex-col")
        this.IsValid = new UIEventSource<boolean>(true)
        this.Value = new UIEventSource<void>(undefined)
    }
}