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import { Evt } from "../lib/index.ts";import * as inDepth from "../tools/inDepth/index.ts";import { diff } from "../tools/reducers/index.ts";import { assert } from "https://deno.land/x/tsafe@v1.3.4/assert.ts";
{
    const users = ["Bob", "Alice"];
    const { same } = inDepth.sameFactory({ "takeIntoAccountArraysOrdering": false });
    const sevUser = Evt.create<string[]>([...users]);
    const update = (users: string[]) => {
        if (same(sevUser.state, users)) {            return;        }
        sevUser.post(inDepth.copy(users));
    };
    let stdout = "";
    sevUser.evtDiff.attach(        ({ newState, prevState }) => {
            const { added, removed } = prevState.reduce(...diff(newState))
            stdout += `${added.join(", ")} joined the chat`;            stdout += `${removed.join(", ")} left the chat`;
        }    );

    update(users); //Print nothing
    users.splice(0, 1); //Remove Bob from the array.
    users.push("Louis");
    //Prints "Louis joined the chat" "Bob left the chat"    update(users);
    assert("Louis joined the chatBob left the chat" === stdout);
}
{
    const users = ["Bob", "Alice"];
    const { same } = inDepth.sameFactory({ "takeIntoAccountArraysOrdering": false });
    const sevUser = Evt.create<string[]>([...users]);
    const update = (users: string[]) => {
        if (same(sevUser.state, users)) {            return;        }
        sevUser.state = inDepth.copy(users);
    };
    let stdout = "";
    sevUser.evtDiff.attach(        ({ newState, prevState }) => {
            const { added, removed } = prevState.reduce(...diff(newState))
            stdout += `${added.join(", ")} joined the chat`;            stdout += `${removed.join(", ")} left the chat`;
        }    );

    update(users); //Print nothing
    users.splice(0, 1); //Remove Bob from the array.
    users.push("Louis");
    //Prints "Louis joined the chat" "Bob left the chat"    update(users);
    assert("Louis joined the chatBob left the chat" === stdout);
}
console.log("PASS");