arch-bot/index.js

import config from './config.json' assert {type: "json"};
import { MatrixClient, SimpleFsStorageProvider, AutojoinRoomsMixin } from "matrix-bot-sdk";

const storage = new SimpleFsStorageProvider("storage.json");
const client = new MatrixClient(config.homeserver, config.token, storage);

AutojoinRoomsMixin.setupOnClient(client);
client.start().then(() => console.log(`Client has started!`));

client.on("room.message", (room, event) => {
    if (!event["content"] || event["sender"] === config.user) return;

    let messageArray = event["content"]["body"].split(" ");
    messageArray = messageArray.filter((str) => str !== '') //? remove empty strings

    if (messageArray[0] == config.prefix) {
        switch (messageArray[1]) {
            case 's':
            case '-Si':
            case 'pkg':
            case 'search':

                let resultIndex = 0;
                let pkgPromise = searchPkgs(messageArray);

                //? last item in the command must the be the result index
                if (Number.isInteger(parseInt(messageArray[messageArray.length - 1]))) {
                    resultIndex = parseInt(messageArray[messageArray.length - 1])
                };

                //? pkgResults is an array containing all search results
                pkgPromise.then(pkgResults => {
                    if (pkgResults) {
                        // let messageHTML = `${pkgResults[resultIndex].pkgname} ${pkgResults[resultIndex].repo} ${pkgResults[resultIndex].licenses} ${pkgResults[resultIndex].pkgdesc}`
                        let messageHTML = `<strong>Package Name</strong>: ${pkgResults[resultIndex].pkgname} <br>
<strong>Repository</strong>: ${pkgResults[resultIndex].repo} <br>
<strong>Architecture</strong>: ${pkgResults[resultIndex].arch} <br>
<strong>Version</strong>: ${pkgResults[resultIndex].pkgver} <br>
<strong>Description</strong>: ${pkgResults[resultIndex].pkgdesc} <br>
<strong>URL</strong>: ${pkgResults[resultIndex].url} <br>
<strong>Build Date</strong>: ${pkgResults[resultIndex].build_date} <br>
<strong>Last Update</strong>: ${pkgResults[resultIndex].last_update} <br>
<strong>Flagged out of Date</strong>: ${pkgResults[resultIndex].flag_date} <br>
<strong>Maintainer(s)</strong>: ${pkgResults[resultIndex].maintainers} <br>
<strong>Packager</strong>: ${pkgResults[resultIndex].packager} <br>
<strong>License(s)</strong>: ${pkgResults[resultIndex].licenses}`

                        client.sendHtmlNotice(room, messageHTML);
                    } else {
                        let messageHTML = `<strong>No package found.</strong>`
                        client.sendHtmlNotice(room, messageHTML);
                    }
                }); //TODO: bot crashes if index is too large 
                break;

            case 'aur': //TODO: search aur
                break;
            case 'h':
            case 'help': //TODO: help menu
                break;
            default:
                let messageHTML = `<strong>Invalid command.</strong>`
                client.sendHtmlNotice(room, messageHTML);
        }
    }
})

/* search parameter values:
    q, 
    name,
    desc,
    repo            (Core, Core-Testing, Extra, Extra-Testing, Multilib, Multilib-Testing),
    arch            (any, x86_64),
    maintainer,
    packager,
    flagged         (Flagged, Not+Flagged)
*/
async function searchPkgs(messageArray) {

    // console.log(messageArray)

    let isFilterApplied = false;
    let skipElement = false;
    let searchURLPath = "https://archlinux.org/packages/search/json/?"
    const filterValues = ['q', 'name', 'desc', 'repo', 'arch', 'maintainer', 'packager', 'flagged'];

    // ? using 'for' instead of 'foreach' to be able to use 'break' and 'continue'
    for (const element of messageArray) {
        // ? if filter item is being searched with it's own filter, skip the next iteration; treating it as a search parameter and not a filter
        // ? !a s q q repo Core
        // ?      ^ ^  ^    ^
        // ?      1 2  1    2
        // ? 1: filter, 2: search parameter (skipped)
        if (skipElement) {
            skipElement = false;
            continue;
        };

        let nextElement = messageArray[messageArray.indexOf(element) + 1];

        for (const filter of filterValues) {
            if (element == filter) {
                isFilterApplied = true;
                if (!nextElement) break;
                searchURLPath += '&' + filter + '=' + nextElement;
                skipElement = true;
            }
        };
    };

    if (!isFilterApplied) {
        searchURLPath += '&q=' + messageArray[2]
    }

    console.log(searchURLPath);
    let response = await fetch(searchURLPath);
    const dataJSON = await response.json();

    if (!dataJSON.results.length) {
        return null //? package does not exist
    } else {
        return dataJSON.results
    }
}