ETAApi/src/apps/private/loads/services.js

"use strict";
const { ROOT_PATH, LIB_PATH, MODELS_PATH, HANDLERS_PATH } = process.env;
const { getModel } = require( `${ROOT_PATH}/${MODELS_PATH}` );
const { getPagination } = require( `${ROOT_PATH}/${LIB_PATH}/Misc.js` );
const { GenericHandler } = require( `${ROOT_PATH}/${HANDLERS_PATH}/Generic.handler.js` );
const Model = getModel('loads');
const ProposalsModel = getModel('proposals');

const populate_list = ['product', 'company', 'carrier', 'vehicle', 'categories'];
const generic = new GenericHandler( Model, null, populate_list );

function getAndFilterList( query ){
    const filter_list = [];
    const { status, posted_by_name, load_status, published_date, loaded_date, transit_date, categories, product, shipment_code } = query;

    if( status ){ filter_list.push( { status } ); }
    if( posted_by_name ) { filter_list.push({ posted_by_name }); }
    if( load_status ) { filter_list.push({ load_status }); }
    if( published_date ) { filter_list.push({ published_date }); }
    if( loaded_date ) { filter_list.push({ loaded_date }); }
    if( transit_date ) { filter_list.push({ transit_date }); }
    if( categories ) { filter_list.push({ categories }); }
    if( product ) { filter_list.push({ product }); }
    if( shipment_code ) { filter_list.push({ shipment_code }); }


    if( filter_list.length == 0 ){
        return null;
    }
    return filter_list;
}

async function findLoads( companyId , query ){
    const { page, elements } = getPagination( query );
    const andFilterList = getAndFilterList( query );
    let filter;
    if( andFilterList ){
        andFilterList.push({$or : [
            { company : companyId },
            { carrier : companyId }
        ]});
        filter = { $and : andFilterList };
    }else{
        filter = {$or : [
            { company : companyId },
            { carrier : companyId }
        ]};
    }
    const { total , limit, skip, data  } = await generic.getList( page , elements, filter );
    const load_list = data;
    for(let i=0; i<load_list.length; i++){
        const load_id = load_list[ i ].id;
        load_list[i] = load_list[i].toObject();
        const no_of_proposals = await ProposalsModel.count({ load : load_id });
        load_list[i].no_of_proposals = no_of_proposals;
    }
    return {
        total,
        limit,
        skip,
        data : load_list
    };
}

async function findElementById( elementId ){
    let retVal = await Model.findById( elementId ).populate( populate_list );
    if( retVal ){
        retVal = retVal.toObject();
        const no_of_proposals = await ProposalsModel.count({ load : elementId });
        retVal.no_of_proposals = no_of_proposals;
    }else{
        retVal = {};
    }
    return retVal;
}

const findList = async(req, res) => {
    try{
        const query  = req.query || {};
        const companyId = req.context.companyId;
        const retVal = await findLoads( companyId , query );
        res.send( retVal );
    }catch(error){
        console.error( error );
        return res.status( 500 ).send({ error });
    }
};

const getById = async(req, res) => {
    try{
        const elementId = req.params.id;
        res.send( await findElementById( elementId ) );
    }catch(error){
        console.error( error );
        return res.status( 500 ).send({ error });
    }
};

const patchLoad = async(req, res) => {
    try{
        const elementId = req.params.id;
        const permissions = req.context.permissions;
        const data = req.body;
        const load = await findElementById( elementId );
        if( !load ){
            throw "You can't modify this load";
        }
        if( !data ){
            throw "load data not sent";
        }
        await Model.findByIdAndUpdate( elementId , data );
        return res.send( await Model.findById( elementId ) );
    }catch(error){
        console.error( error );
        return res.status( 500 ).send({ error });
    }
};

const postLoad = async(req, res) => {
    try{
        const companyId = req.context.companyId;
        const userId = req.context.userId;
        const user_name = req.context.user.first_name;
        const permissions = req.context.permissions;
        const data = req.body;
        if( !data ){
            throw "Load data not sent";
        }
        if(permissions !== "role_shipper" ){
            throw "You can't create loads";
        }
        data.company = companyId;
        data.posted_by = userId;
        data.name = user_name;
        const load = new Model( data );
        await load.save();
        return res.send( load );
    }catch(error){
        console.error( error );
        return res.status( 500 ).send({ error });
    }
};

const deleteLoad = async(req, res) => {
    try{
        const companyId = req.context.companyId;
        const elementId = req.params.id;
        const permissions = req.context.permissions;
        const load = await findElementById( elementId , companyId );
        if(!load){
            throw "You can't delete this load";
        }
        if(permissions !== "role_shipper" ){
            throw "You can't delete loads";
        }
        await Model.findByIdAndDelete( elementId );
        return res.send(load);
    }catch(error){
        console.error( error );
        return res.status( 500 ).send({ error });
    }
};

module.exports = { findList, getById, patchLoad, postLoad, deleteLoad };