typescript todo.sh parser playground

todo-sh.ts

const ex: string = "x 2022-01-01 2022-10-04 say hello to mom category:family when i visit later";

interface Todo {
    done: boolean,
    doneDate?: string,
    startDate?: string,
    body: string,
    meta: { [name: string]: string}
}

/*
0 looking at done flag
1 looking at end date 
2 looking at start date
3 looking at body 
*/

function parse(input: string): Todo {
    const tokens = input.split(" ");
    var state = 0
    const todo: Todo = {
        done: false,
        doneDate: "",
        startDate: "",
        body: "",
        meta: {}
    }
    for( var i =0; i < tokens.length; i++) {
        const t = tokens[i];
        switch(state) {
            case 0: {
                if (t == "x") {
                    todo.done = true;
                    state = 1;
                } else {
                    state = 2;
                    i--;
                }
                break;
            }
            case 1: {
                if (isDate(t)) {
                    todo.doneDate = t;
                    state = 2;
                } else {
                    state = 3;
                    i--;
                }
                break;
            }
            case 2: {
                if (isDate(t)) {
                    todo.startDate = t;
                    state = 3;
                } else {
                    state = 3;
                    i--;
                }
                break;
            }
            case 3: {
                if (t.includes(":")) {
                    const parts = t.split(":");
                    todo.meta[ parts[0] ] = parts[1];
                }
                todo.body = todo.body + " " + t 
                break;
            }
        }
    }
    return todo;
}

function isDate(d: string): boolean {
    const r = /\d-\d-\d/;
    const result = (d.startsWith("2022") || d.startsWith("2021") || d.startsWith("2022"))
    // console.log(d, result);
    return result;
}

[
    'x 2022-01-01 2021-12-12 hello world',
    'go to the store',
    'eat more category:healthy',
    '2021-23-12 pick up laundry',
    ex
].forEach(function (s: string) {
    console.log(parse(s));
})