sprinklers3/app/components/RunSectionForm.tsx

import { computed } from "mobx";
import { observer } from "mobx-react";
import * as React from "react";
import { DropdownItemProps, DropdownProps, Form, Header, Segment } from "semantic-ui-react";

import { Duration, Section } from "@common/sprinklers";
import DurationInput from "./DurationInput";

@observer
export default class RunSectionForm extends React.Component<{
    sections: Section[],
}, {
    duration: Duration,
    section: number | "",
}> {
    constructor() {
        super();
        this.state = {
            duration: new Duration(1, 1),
            section: "",
        };
    }

    render() {
        const { section, duration } = this.state;
        return <Segment>
            <Header>Run Section</Header>
            <Form>
                <Form.Group>
                    <Form.Select label="Section" placeholder="Section" options={this.sectionOptions} value={section}
                        onChange={this.onSectionChange} />
                    <DurationInput duration={duration} onDurationChange={this.onDurationChange} />
                    {/*Label must be &nbsp; to align it properly*/}
                    <Form.Button label="&nbsp;" primary onClick={this.run} disabled={!this.isValid}>Run</Form.Button>
                </Form.Group>
            </Form>
        </Segment>;
    }

    private onSectionChange = (e: React.SyntheticEvent<HTMLElement>, v: DropdownProps) => {
        this.setState({ section: v.value as number });
    }

    private onDurationChange = (newDuration: Duration) => {
        this.setState({ duration: newDuration });
    }

    private run = (e: React.SyntheticEvent<HTMLElement>) => {
        e.preventDefault();
        if (typeof this.state.section !== "number") {
            return;
        }
        const section: Section = this.props.sections[this.state.section];
        console.log(`running section ${section} for ${this.state.duration}`);
        section.run(this.state.duration)
            .then((a) => console.log("ran section", a))
            .catch((err) => console.error("error running section", err));
    }

    private get isValid(): boolean {
        return typeof this.state.section === "number";
    }

    @computed
    private get sectionOptions(): DropdownItemProps[] {
        return this.props.sections.map((s, i) => ({
            text: s ? s.name : null,
            value: i,
        }));
    }
}