Handle infinite ranges in filters

When only one side of the range is infinite, we never add a condition to
the script filter for that half of the range, so elasticsearch treats it
as infinite.

When both sides of the range are infinite, we use a match_all filter
instead of a conditional script to define the range.

src/ui/public/filter_bar/lib/__tests__/mapMatchAll.js

@@ -0,0 +1,51 @@
+
+describe('ui/filter_bar/lib', function () {
+  describe('mapMatchAll()', function () {
+    const expect = require('expect.js');
+    const ngMock = require('ngMock');
+    let resolvePromises;
+    let mapMatchAll;
+    let filter;
+
+
+    beforeEach(ngMock.module('kibana'));
+    beforeEach(ngMock.inject(function (Private, $rootScope) {
+      resolvePromises = () => $rootScope.$apply();
+      mapMatchAll = Private(require('ui/filter_bar/lib/mapMatchAll'));
+      filter = {
+        match_all: {},
+        meta: {
+          field: 'foo',
+          formattedValue: 'bar'
+        }
+      };
+    }));
+
+    context('when given a filter that is not match_all', function () {
+      it('filter is rejected', function (done) {
+        delete filter.match_all;
+        mapMatchAll(filter).catch(result => {
+          expect(result).to.be(filter);
+          done();
+        });
+        resolvePromises();
+      });
+    });
+
+    context('when given a match_all filter', function () {
+      let result;
+      beforeEach(function () {
+        mapMatchAll(filter).then(r => result = r);
+        resolvePromises();
+      });
+
+      it('key is set to meta field', function () {
+        expect(result).to.have.property('key', filter.meta.field);
+      });
+
+      it('value is set to meta formattedValue', function () {
+        expect(result).to.have.property('value', filter.meta.formattedValue);
+      });
+    });
+  });
+});

src/ui/public/filter_bar/lib/mapFilter.js

@@ -21,6 +21,7 @@ define(function (require) {
     // that either handles the mapping operation or not
     // and add it here. ProTip: These are executed in order listed
     var mappers = [
+      Private(require('./mapMatchAll')),
       Private(require('./mapTerms')),
       Private(require('./mapRange')),
       Private(require('./mapExists')),

src/ui/public/filter_bar/lib/mapMatchAll.js

@@ -0,0 +1,12 @@
+define(function (require) {
+  return function mapMatchAllProvider(Promise) {
+    return function (filter) {
+      if (filter.match_all) {
+        const key = filter.meta.field;
+        const value = filter.meta.formattedValue || 'all';
+        return Promise.resolve({ key, value });
+      }
+      return Promise.reject(filter);
+    };
+  };
+});

src/ui/public/filter_manager/__tests__/lib/range.js

@@ -63,5 +63,53 @@ describe('Filter Manager', function () {
 
       });
     });
+
+    context('when given params where one side is infinite', function () {
+      let filter;
+      beforeEach(function () {
+        filter = fn(indexPattern.fields.byName['script number'], { gte: 0, lt: Infinity }, indexPattern);
+      });
+
+      describe('returned filter', function () {
+        it('is a script filter', function () {
+          expect(filter).to.have.property('script');
+        });
+
+        it('contain a param for the finite side', function () {
+          expect(filter.script.params).to.have.property('gte', 0);
+        });
+
+        it('does not contain a param for the infinite side', function () {
+          expect(filter.script.params).not.to.have.property('lt');
+        });
+
+        it('does not contain a script condition for the infinite side', function () {
+          const script = indexPattern.fields.byName['script number'].script;
+          expect(filter.script.script).to.equal(`(${script})>=gte`);
+        });
+      });
+    });
+
+    context('when given params where both sides are infinite', function () {
+      let filter;
+      beforeEach(function () {
+        filter = fn(indexPattern.fields.byName['script number'], { gte: -Infinity, lt: Infinity }, indexPattern);
+      });
+
+      describe('returned filter', function () {
+        it('is a match_all filter', function () {
+          expect(filter).not.to.have.property('script');
+          expect(filter).to.have.property('match_all');
+        });
+
+        it('does not contain params', function () {
+          expect(filter).not.to.have.property('params');
+        });
+
+        it('meta field is set to field name', function () {
+          expect(filter.meta.field).to.equal('script number');
+        });
+      });
+    });
   });
 });

src/ui/public/filter_manager/lib/range.js

@@ -1,27 +1,44 @@
 define(function (require) {
-  var _ = require('lodash');
+  const _ = require('lodash');
+  const OPERANDS_IN_RANGE = 2;
+
   return function buildRangeFilter(field, params, indexPattern, formattedValue) {
-    var filter = { meta: { index: indexPattern.id } };
+    const filter = { meta: { index: indexPattern.id } };
     if (formattedValue) filter.meta.formattedValue = formattedValue;
 
     params = _.clone(params);
 
-    if (params.gte && params.gt) throw new Error('gte and gt are mutually exclusive');
-    if (params.lte && params.lt) throw new Error('lte and lt are mutually exclusive');
+    if ('gte' in params && 'gt' in params) throw new Error('gte and gt are mutually exclusive');
+    if ('lte' in params && 'lt' in params) throw new Error('lte and lt are mutually exclusive');
 
-    if (field.scripted) {
-      var operators = {
+    const totalInfinite = ['gt', 'lt'].reduce((totalInfinite, op) => {
+      const key = op in params ? op : `${op}e`;
+      const isInfinite = Math.abs(params[key]) === Infinity;
+
+      if (isInfinite) {
+        totalInfinite++;
+        delete params[key];
+      }
+
+      return totalInfinite;
+    }, 0);
+
+    if (totalInfinite === OPERANDS_IN_RANGE) {
+      filter.match_all = {};
+      filter.meta.field = field.name;
+    } else if (field.scripted) {
+      const operators = {
         gt: '>',
         gte: '>=',
         lte: '<=',
         lt: '<',
       };
 
-      var script = _.map(params, function (val, key) {
+      const script = _.map(params, function (val, key) {
         return '(' + field.script + ')' + operators[key] + key;
       }).join(' && ');
 
-      var value = _.map(params, function (val, key) {
+      const value = _.map(params, function (val, key) {
         return operators[key] + field.format.convert(val);
       }).join(' ');
 
@@ -32,6 +49,7 @@ define(function (require) {
       filter.range = {};
       filter.range[field.name] = params;
     }
+
     return filter;
   };
 });