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integration.js
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integration.js
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'use strict';
const async = require('async');
const { Pool } = require('pg');
let _pool;
let poolSignature = '';
let Logger;
let summaryMap = [];
let detailsMap = [];
function getPool(options) {
let optionString = options.host + options.user + options.port + options.password + options.database;
if (poolSignature != optionString) {
poolSignature = optionString;
_pool = new Pool({
connectionLimit: 10,
host: options.host,
user: options.user,
port: options.port,
password: options.password,
database: options.database
});
}
return _pool;
}
/**
* Takes the attribute option string which is a comma delimited list of attributes to display and converts
* it into an object of the format:
* ```
* {
* label: <attribute label>,
* column: <attribute name>,
* type: <attribute type>
* }
* ```
* The label is optional and is the display label to be used for the attribute. If no label is provided then the
* column name is used
*
* The column is the name of the returned column in the query
*
* The type is the type of data and can change display behavior. Currently supports 'link' which causes the
* template to display the data as a clickable link.
*
* @param attributeOption
* @returns {*}
*/
function processAttributeOption(attributeOption) {
if (attributeOption.trim().length === 0) {
return [];
}
const fields = attributeOption.split(',').map((column) => {
const tokens = column.split(':');
if (tokens.length === 1) {
return {
column: tokens[0].trim(),
label: tokens[0].trim(),
type: null
};
} else if (tokens.length === 2) {
return {
column: tokens[0].trim(),
label: tokens[1].trim(),
type: null
};
} else if (tokens.length === 3) {
return {
column: tokens[0].trim(),
label: tokens[1].trim(),
type: tokens[2].trim().toLowerCase()
};
}
});
return fields;
}
function getDetails(rows, options) {
const details = [];
rows.forEach((row) => {
const document = [];
detailsMap.forEach((field) => {
const fieldValue = row[field.column];
if (typeof fieldValue !== undefined) {
document.push({
label: field.label,
value: fieldValue === null ? 'null' : fieldValue,
type: fieldValue === null ? 'null' : field.type
});
}
});
if (document.length > 0) {
details.push(document);
}
});
return details;
}
function getSummaryTags(results, options) {
const tags = [];
for (let i = 0; i < options.maxSummaryRows && i < results.length; i++) {
summaryMap.forEach((field, index) => {
let result = results[i];
if (typeof result[field.column] !== undefined) {
if (field.label) {
tags.push(`${field.label}: ${result[field.column]}`);
} else {
// Capture null values as the string "null" otherwise they are treated as falsey
// in the template and not displayed.
tags.push(result[field.column] === null ? 'null' : result[field.column]);
}
}
});
}
if (tags.length === 0) {
tags.push(`${results.length} ${results.length === 1 ? 'result' : 'results'}`);
} else if (options.maxSummaryRows < results.length) {
tags.push(`+${results.length - options.maxSummaryRows} results`);
}
return tags;
}
/**
*
* @param entities
* @param options
* @param cb
*/
function doLookup(entities, options, cb) {
let lookupResults = [];
let pool = getPool(options);
Logger.trace({ entities: entities }, 'doLookup');
summaryMap = processAttributeOption(options.summaryAttributes);
detailsMap = processAttributeOption(options.detailAttributes);
Logger.info({ summaryMap, detailsMap }, 'Maps');
async.each(
entities,
(entityObj, done) => {
let query = {
text: options.query,
values: [entityObj.value]
};
Logger.debug({ query: query }, 'Query');
pool.query(query, function (error, results) {
if (error) {
return done(error);
}
Logger.debug({ results: results }, 'SQL Results');
if (results.rows.length === 0) {
lookupResults.push({
entity: entityObj,
data: null
});
} else {
lookupResults.push({
entity: entityObj,
data: {
summary: getSummaryTags(results.rows, options),
details: {
formatted: detailsMap.length > 0 ? getDetails(results.rows) : null,
raw: results.rows
}
}
});
}
done(null);
});
},
(err) => {
if (err) {
Logger.error({ err: err, stack: err.stack }, 'Error Running Query');
err = {
detail: 'Error Running Query',
debug: {
stack: err.stack,
err: err
}
};
} else {
Logger.debug({ lookupResults: lookupResults }, 'Lookup Results');
}
cb(err, lookupResults);
}
);
}
function validateStringOption(errors, options, optionName, errMessage) {
if (
typeof options[optionName].value !== 'string' ||
(typeof options[optionName].value === 'string' && options[optionName].value.length === 0)
) {
errors.push({
key: optionName,
message: errMessage
});
}
}
function validateOptions(options, cb) {
let errors = [];
validateStringOption(errors, options, 'host', '*required');
validateStringOption(errors, options, 'port', '*required');
validateStringOption(errors, options, 'database', '*required');
validateStringOption(errors, options, 'user', '*required');
validateStringOption(errors, options, 'password', '*required');
validateStringOption(errors, options, 'query', '*required');
if (options.maxSummaryRows.value < 0) {
errors.push({
key: 'maxSummaryRows',
message: 'Max Summary Rows must be greater than or equal to 0'
});
}
cb(null, errors);
}
function startup(logger) {
Logger = logger;
}
module.exports = {
doLookup,
startup,
validateOptions
};