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server.js
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'use strict'
const hapi = require('hapi'); // Server framework
const get = require('request-promise'); // REST client
const promiseAll = require('promises-all'); // Parallel processing
const vision = require('vision'); // View engine for HAPI
const handlebars = require('handlebars'); // Templating module
const fs = require('fs'); // File system operations
const numeralHelper = require("handlebars.numeral"); // Number formatting
const prettyjson = require('prettyjson'); // JSON formatting
const util = require('util'); // Utilities module
const debug = require('debug')('server'); // Debug module
const config = require('./config');
const server = new hapi.Server();
server.connection({
host: '127.0.0.1',
port: 3000
});
// Register vision for our views
server.register(vision, (err) => {
server.views({
engines: {
html: handlebars
},
relativeTo: __dirname,
path: ['./views', './views/partials']
});
});
// Default routes to author search
server.route({
method: 'GET',
path: '/',
handler: function (request, reply) {
reply.redirect('/authors');
}
});
// Show search form
server.route([{
method: 'GET',
path: '/authors',
handler: function (request, reply) {
reply.view('search.html', { entityType: "author" });
}
}, {
method: 'GET',
path: '/countries',
handler: function (request, reply) {
reply.view('search.html', { entityType: "country" });
}
}, {
method: 'GET',
path: '/countryGroups',
handler: function (request, reply) {
reply.view('search.html', { entityType: "countryGroup" });
}
}, {
method: 'GET',
path: '/institutions',
handler: function (request, reply) {
reply.view('search.html', { entityType: "institution" });
}
}, {
method: 'GET',
path: '/institutionGroups',
handler: function (request, reply) {
reply.view('search.html', { entityType: "institutionGroup" });
}
}, {
method: 'GET',
path: '/topics',
handler: function (request, reply) {
reply.view('search.html', { entityType: "topic" });
}
}]);
// Submit search
server.route({
method: 'GET',
path: '/search',
handler: function(request, reply) {
const entityType = request.query.entityType;
if (entityType == "author") {
var options = getBasicOptions('https://api.elsevier.com/content/search/author');
options.qs = {
query: getAuthorQuery(request.query.name),
count: 20
}
get(options)
.then(function(body) {
const results = JSON.parse(body)['search-results'];
debug('Search results:\n' + prettyjson.render(results));
reply.view('authorResults', {result: results});
}).catch(function(error) {
throw error;
});
} else {
var options = getBasicOptions('https://api.elsevier.com/analytics/scival/'+entityType+'/search');
options.qs = {
query: util.format('name(%s)', request.query.name)
}
get(options)
.then(function(body) {
const results = JSON.parse(body)['results'];
debug('Search results:\n' + prettyjson.render(results));
reply.view('results', {
result: results,
entityType: entityType
});
}).catch(function(error) {
throw error;
});
}
}
});
// Show a particular entity
server.route([{
method: 'GET',
path: '/author/{id}',
handler: function(request, reply) {
var promises = [];
var context = {};
// Get the authors metrics from SciVal
const authorId = request.params.id;
var options = getBasicOptions('https://api.elsevier.com/analytics/scival/author/metrics');
options.qs = {
metricTypes: 'ScholarlyOutput,CitationCount,hIndices,FieldWeightedCitationImpact,CitationsPerPublication,Collaboration',
byYear: false,
yearRange: '5yrsAndCurrent',
authors: authorId
}
// Add metrics request to list of promises
promises.push(
get(options)
.then(function(body) {
const results = JSON.parse(body).results;
debug('Metric results:\n' + prettyjson.render(results));
context.results = results;
}).catch(function(error) {
throw error;
})
);
// Get the authors most recent pubs from Scopus
options.url = 'https://api.elsevier.com/content/search/scopus';
options.qs = {
query: util.format('au-id(%s)', authorId),
field: 'eid,title,citedby-count,coverDate',
sort: 'coverDate',
count: 5
}
// Add pubs request to list of promises
promises.push(
get(options)
.then(function(body) {
const entry = JSON.parse(body)['search-results'].entry;
debug('Scopus search:\n' +prettyjson.render(entry));
context.docs = entry;
}).catch(function(error) {
throw error;
})
);
// Execute promises asynchronously
promiseAll.all(promises)
.then(function() {
reply.view('author', context);
}).catch(function(error) {
throw error;
})
}
}, {
method: 'GET',
path: '/country/{id}',
handler: function(request, reply) {
// Get the country metrics from SciVal
const countryId = encodeURIComponent(request.params.id);
var options = getBasicOptions('https://api.elsevier.com/analytics/scival/country/metrics');
options.qs = {
metricTypes: 'ScholarlyOutput,CitationCount,FieldWeightedCitationImpact,CitationsPerPublication,Collaboration',
byYear: false,
yearRange: '5yrsAndCurrent',
countryIds: countryId
}
get(options)
.then(function(body) {
const results = JSON.parse(body).results;
debug('Metric results:\n' + prettyjson.render(results));
reply.view('country', {results: results});
}).catch(function(error) {
throw error;
})
}
}, {
method: 'GET',
path: '/countryGroup/{id}',
handler: function(request, reply) {
var promises = [];
var context = {};
// Get the country group metrics from SciVal
const countryGroupId = request.params.id;
var options = getBasicOptions('https://api.elsevier.com/analytics/scival/countryGroup/metrics');
options.qs = {
metricTypes: 'ScholarlyOutput,CitationCount,FieldWeightedCitationImpact,CitationsPerPublication,Collaboration',
byYear: false,
yearRange: '5yrsAndCurrent',
countryGroupIds: countryGroupId
}
// Add metrics request to list of promises
promises.push(
get(options)
.then(function(body) {
const results = JSON.parse(body).results;
debug('Metric results:\n' + prettyjson.render(results));
context.results = results;
}).catch(function(error) {
throw error;
})
);
// Get the country group details
options.url = 'https://api.elsevier.com/analytics/scival/countryGroup/'+countryGroupId;
// Add details request to list of promises
promises.push(
get(options)
.then(function(body) {
const countryGroup = JSON.parse(body).countryGroup;
debug('Country group:\n' +prettyjson.render(countryGroup));
context.countryGroup = countryGroup;
}).catch(function(error) {
throw error;
})
);
// Execute promises asynchronously
promiseAll.all(promises)
.then(function() {
reply.view('countryGroup', context);
}).catch(function(error) {
throw error;
})
}
}, {
method: 'GET',
path: '/institution/{id}',
handler: function(request, reply) {
var promises = [];
var context = {};
// Get the institution metrics from SciVal
const institutionId = encodeURIComponent(request.params.id);
var options = getBasicOptions('https://api.elsevier.com/analytics/scival/institution/metrics');
options.qs = {
metricTypes: 'ScholarlyOutput,CitationCount,FieldWeightedCitationImpact,CitationsPerPublication,Collaboration',
byYear: false,
yearRange: '5yrsAndCurrent',
institutionIds: institutionId
}
// Add metrics request to list of promises
promises.push(
get(options)
.then(function(body) {
const results = JSON.parse(body).results;
debug('Metric results:\n' + prettyjson.render(results));
context.results = results;
}).catch(function(error) {
throw error;
})
);
// Get the topics for the institution
options.url = 'https://api.elsevier.com/analytics/scival/topic/institutionId/' + institutionId;
options.qs = {
yearRange: '5yrsAndCurrent',
limit: 5
}
// Add topics request to list of promises
promises.push(
get(options)
.then(function(body) {
const topics = JSON.parse(body).topics;
debug('Topic results:\n' + prettyjson.render(topics));
context.topics = topics;
}).catch(function(error) {
throw error;
})
);
// Execute promises asynchronously
promiseAll.all(promises)
.then(function() {
reply.view('institution', context);
}).catch(function(error) {
throw error;
})
}
}, {
method: 'GET',
path: '/institutionGroup/{id}',
handler: function(request, reply) {
var promises = [];
var context = {};
// Get the metrics from SciVal
const institutionGroupId = request.params.id;
var options = getBasicOptions('https://api.elsevier.com/analytics/scival/institutionGroup/metrics');
options.qs = {
metricTypes: 'ScholarlyOutput,CitationCount,FieldWeightedCitationImpact,CitationsPerPublication,Collaboration',
byYear: false,
yearRange: '5yrsAndCurrent',
institutionGroupIds: institutionGroupId
}
// Add metrics request to list of promises
promises.push(
get(options)
.then(function(body) {
const results = JSON.parse(body).results;
debug('Metric results:\n' + prettyjson.render(results));
context.results = results;
}).catch(function(error) {
throw error;
})
);
// Get the country group details
options.url = 'https://api.elsevier.com/analytics/scival/institutionGroup/'+institutionGroupId;
// Add details request to list of promises
promises.push(
get(options)
.then(function(body) {
const institutionGroup = JSON.parse(body).institutionGroup;
debug('Institution group:\n' +prettyjson.render(institutionGroup));
context.institutionGroup = institutionGroup;
}).catch(function(error) {
throw error;
})
);
// Execute promises asynchronously
promiseAll.all(promises)
.then(function() {
reply.view('institutionGroup', context);
}).catch(function(error) {
throw error;
})
}
}, {
method: 'GET',
path: '/topic/{id}',
handler: function(request, reply) {
// Get the topic metrics from SciVal
const topicId = encodeURIComponent(request.params.id);
var options = getBasicOptions('https://api.elsevier.com/analytics/scival/topic/metrics');
options.qs = {
metricTypes: 'ScholarlyOutput,CitationCount,FieldWeightedCitationImpact,InstitutionCount',
byYear: false,
yearRange: '5yrsAndCurrent',
topicIds: topicId
}
get(options)
.then(function(body) {
const results = JSON.parse(body).results;
debug('Metric results:\n' + prettyjson.render(results));
reply.view('topic', {results: results});
}).catch(function(error) {
throw error;
})
}
}]);
// Show a particular abstact
server.route({
method: 'GET',
path: '/abstract/{id}',
handler: function(request, reply) {
const eid = encodeURIComponent(request.params.id);
var options = getBasicOptions('https://api.elsevier.com/content/abstract/eid/' + eid);
options.qs = {
view: 'META_ABS',
httpAccept: 'application/json'
}
get(options)
.then(function(body) {
const abstract = JSON.parse(body)['abstracts-retrieval-response'];
debug('Scopus abstract:\n' + prettyjson.render(abstract));
reply.view('abstract', {result: abstract});
}).catch(function(error) {
throw error;
})
},
});
// Helper function that extracts the numeric portion of a Scopus EID.
handlebars.registerHelper('removeEIDPrefix', function(str) {
var pos = str.lastIndexOf('-');
return str.substring(pos+1);
});
// Helper function that adds spaces to camelcase strings
handlebars.registerHelper('camelCaseToString', function(str) {
return str.charAt(0).toUpperCase() + str.slice(1).split(/(?=[A-Z])/).join(' ');
});
// Helper function that does a logical if comparison
handlebars.registerHelper('ifEquals', function(arg1, arg2, options) {
return (arg1 == arg2) ? options.fn(this) : options.inverse(this);
});
// Helper function that gets the current year
handlebars.registerHelper('currentYear', function(offset) {
return new Date().getFullYear() - offset;
});
numeralHelper.registerHelpers(handlebars);
// Register partials
var partialsDir = __dirname + '/views/partials';
var filenames = fs.readdirSync(partialsDir);
filenames.forEach(function (filename) {
var matches = /^([^.]+).html$/.exec(filename);
if (!matches) {
return;
}
var name = matches[1];
console.log(util.format("Registering partial file [%s]", name));
var template = fs.readFileSync(partialsDir + '/' + filename, 'utf8');
handlebars.registerPartial(name, template);
});
/**
* Get basic REST API options
* @param {string} url - The base URL of the REST service to call.
*/
function getBasicOptions(url) {
return {
url: url,
headers: {
'Content-Type': 'application/json',
'X-ELS-APIKey': config.api_key,
'X-ELS-Insttoken': config.inst_token,
'X-ELS-Authtoken': config.auth_token
}
};
};
/**
* Get Scopus author query string
* @param {string} fullName - author full name
*/
function getAuthorQuery(fullName) {
var firstName = fullName.split(' ').slice(0, -1).join(' ');
var lastName = fullName.split(' ').slice(-1).join(' ');
var query = 'authlast(' + lastName + ')';
if (firstName) {
query += ' and authfirst(' + firstName + ')';
}
return query;
}
// Start the server
server.start((err) => {
if (err) {
throw err;
}
console.log(`Server running at: ${server.info.uri}`);
});