Arjun Patel
54 lines
1.4 KiB
JavaScript
54 lines
1.4 KiB
JavaScript
const db = require('../../config/db.config.js'),
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errorMaker = require('../../helpers/error.maker');
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const { Grant, Cause, Region, Organization } = db;
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const log10 = val => {
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return Math.log(val) / Math.log(10);
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};
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// GET suggested organizations based on chosen causes + regions
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exports.findSuggested = (req, res, next) => {
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const { amount, causes, regions } = req.body;
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// formula for max amount of organizations to choose
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const max_orgs = Math.floor(1.5 * log10(amount));
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const QUERY =
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'SELECT * from organizations ' +
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'WHERE primary_cause IN (:causes) and primary_region IN (:regions) ' +
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'LIMIT :max_orgs';
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db.sequelize
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.query(QUERY, {
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replacements: { causes, regions, max_orgs },
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type: db.Sequelize.QueryTypes.SELECT
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})
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.then(orgs => {
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res.status(200).json({
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orgs,
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num_items: orgs.length,
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max_orgs,
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distribution: amount / orgs.length
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});
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})
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.catch(error => next(error));
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};
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// GET min and optimal amounts for the chosen causes + regions
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exports.findAmounts = (req, res, next) => {
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const { num_causes, num_regions } = req.body;
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const feature_factor = parseInt(num_causes) + parseFloat(num_regions / 2);
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// calculate min amount for chosen causes and regions
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const min_amount = Math.ceil(feature_factor * 15);
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// calculate optimal for chosen causes and regions
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const optimal_amount = Math.ceil(Math.pow(5, feature_factor));
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res.status(200).json({
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min_amount,
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optimal_amount
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});
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};
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