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require([
'gitbook',
'jquery'
], function(gitbook, $) {
// Define global search engine
function LunrSearchEngine() {
this.index = null;
this.store = {};
this.name = 'LunrSearchEngine';
}
// Initialize lunr by fetching the search index
LunrSearchEngine.prototype.init = function() {
var that = this;
var d = $.Deferred();
$.getJSON(gitbook.state.basePath+'/search_index.json')
.then(function(data) {
// eslint-disable-next-line no-undef
that.index = lunr.Index.load(data.index);
that.store = data.store;
d.resolve();
});
return d.promise();
};
// Search for a term and return results
LunrSearchEngine.prototype.search = function(q, offset, length) {
var that = this;
var results = [];
if (this.index) {
results = $.map(this.index.search(q), function(result) {
var doc = that.store[result.ref];
return {
title: doc.title,
url: doc.url,
body: doc.summary || doc.body
};
});
}
return $.Deferred().resolve({
query: q,
results: results.slice(0, length),
count: results.length
}).promise();
};
// Set gitbook research
gitbook.events.bind('start', function(e, config) {
var engine = gitbook.search.getEngine();
if (!engine) {
gitbook.search.setEngine(LunrSearchEngine, config);
}
});
});
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