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search.js
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search.js
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const createFilters = require('./facets/create-filters');
const createFiltersAll = require('./facets/create-filter-all');
const aggregationTotalCategories = require('./facets/aggs-total-categories');
const createAggregations = require('./facets/create-aggregations');
const createPostFilter = require('./facets/create-post-filter');
const searchWeights = require('./search-weights');
/**
* Search with aggregations
* The total aggregation is a filter bucket. It excludes data which are not agents archives or objects
* @param {Object} elastic - the elasticsearch client
* @param {Object} queryParams - the queryParams Object
* @param {Function} next - the callback with error and response as parameters
*/
module.exports = async (elastic, queryParams) => {
const pageNumber = queryParams.pageNumber <= 150 ? queryParams.pageNumber : 150;
const pageSize = queryParams.pageSize;
var escapedQuery = queryParams.q ? queryParams.q.replace(/\//g, '\\$1') : '';
var body = {
size: pageSize,
query: {
function_score: {
query: {
bool: {
filter: {
terms: {
'type.base': ['agent', 'archive', 'object']
}
},
should: [{
query_string: {
query: escapedQuery,
fields: [
'name.value_stem',
'title.value_stem',
'summary_title_stem',
'lifecycle.creation.maker.summary_title_stem'
]
}
}, {
match: {
'identifier.value': {
query: queryParams.q,
boost: 200
}
}
}, {
prefix: {
'identifier.value': {
value: queryParams.q,
boost: 200
}
}
}, {
match_phrase: {
'title.value_text': {
query: queryParams.q,
slop: 100,
boost: 150
}
}
}, {
match_phrase: {
'name.value_text': {
query: queryParams.q,
slop: 50
}
}
}, {
match_phrase: {
'summary_title_stem': {
query: queryParams.q,
slop: 50
}
}
}, {
match_phrase: {
'description.value': {
query: queryParams.q,
slop: 150,
boost: 2
}
}
}]
}
},
functions: searchWeights
}
},
min_score: 0.01
};
const searchOpts = {
index: 'smg',
from: pageNumber * pageSize,
body: body
};
if (!queryParams.q) {
searchOpts.body.query.function_score.query = { match_all: {} };
}
// sort by modification or creation date */
if (queryParams.pageSort) {
// searchOpts.body.functions = {}; // drop any other sorting or ordering
if (queryParams.pageSort === 'created') {
searchOpts.body.sort = [{ 'admin.created': 'desc' }];
}
if (queryParams.pageSort === 'modified') {
searchOpts.body.sort = [{ 'admin.modified': 'desc' }];
}
}
if (queryParams.random) {
/* See https://github.com/TheScienceMuseum/collectionsonline/issues/780
Allows users to request a number (n) of random items using query '?random=n'
Where 'n' is a number between 1 and 50
*/
searchOpts.body = {
size: queryParams.random,
query: {
function_score: {
query: { match_all: {} },
functions: [{
random_score: {
seed: Date.now()
}
}]
}
},
min_score: 0.01
};
}
const filtersType = [{ terms: { 'type.base': ['agent', 'archive', 'object'] } }];
const filtersPeople = createFilters(queryParams, 'agent');
const filtersObjects = createFilters(queryParams, 'object');
const filterDocuments = createFilters(queryParams, 'archive');
const filters = {
type: filtersType,
people: filtersPeople,
objects: filtersObjects,
documents: filterDocuments
};
filters.all = createFiltersAll(queryParams, filters);
/**
* Build filters for aggregations based on queryParams object
* queryParams contains a representation of the selected filters by the user
*/
searchOpts.body.aggs = {};
/**
* Total per category aggregations
*/
Object.assign(searchOpts.body.aggs, aggregationTotalCategories(filters));
/**
* Create aggregations
*/
Object.assign(searchOpts.body.aggs, createAggregations(queryParams));
/**
* Create post filter query. This query is going to filter the list of results depending on the category and the filters selected by the user
*/
searchOpts.body.post_filter = {};
Object.assign(searchOpts.body.post_filter, createPostFilter(queryParams, filters));
return await elastic.search(searchOpts);
};