[SearchBar] Dates, Booleans, Numbers and Range Clauses (#485)

Added date, boolean and number support to the Query language. With that, also added support for the following operations on field clauses:

- greater than (`gt`)
- greater than or equals (`gte`)
- less than (`lt`)
- less than or equals (`lte`)

When it comes to date values, we try to cover a large range of user friendly formats, including terms such as: `today`, `yesterday`, `last week`, `next week`, `this week`, `this month` and `last/next month/year`.

Date operation also respect the granularity of the date.. for example, `today` refers to the full day, therefore the value has a `DAY` granularity. Therefore, the expression `date:'today'` will match any value that falls in the full day.

With this change, the search bar also supports a "schema" - this enables defining a more granular set of rules of how the query should be interpreted. For example, the schema may state that field `count` is of type 'number' - if the user tries to assign a string to this field, a parsing error will be triggered. Aside from the data types, the schema enables defining finer validation logic for the assigned field values.

The `EuiInMemoryTable` was updated such that it is now possible to set `schema: true` on its search box. This will deduce a schema from the configured columns. (this can further be enhanced in the future, by supporting `searchable` and `validate` properties on the table columns).

CHANGELOG.md

@@ -1,6 +1,7 @@
 # [`master`](https://github.com/elastic/eui/tree/master)
 
 - Relaxed query syntax of `EuiSearchBar` to allow usage of hyphens without escaping ([#581](https://github.com/elastic/eui/pull/581))
+- Added support for range queries in `EuiSearchBar` (works for numeric and date values) ([#485](https://github.com/elastic/eui/pull/485))
 - Add support for expandable rows to `EuiBasicTable` ([#585](https://github.com/elastic/eui/pull/585))
 
 # [`0.0.35`](https://github.com/elastic/eui/tree/v0.0.35)

package.json

@@ -85,7 +85,7 @@
     "html-webpack-plugin": "^2.30.1",
     "jest": "^22.0.6",
     "jest-cli": "^22.0.6",
-    "moment": "2.19.3",
+    "moment": "^2.20.1",
     "node-sass": "^4.5.3",
     "npm-run": "^4.1.2",
     "pegjs": "^0.10.0",

src-docs/src/views/search_bar/props_info.js

@@ -75,6 +75,60 @@ export const propsInfo = {
           required: false,
           defaultValue: { value: 'false' },
           type: { name: 'boolean' }
+        },
+        schema: {
+          description: 'A schema describing the supported fields and flags',
+          required: false,
+          type: { name: '#Schema' }
+        }
+      }
+    }
+  },
+
+  Schema: {
+    __docgenInfo: {
+      _euiObjectType: 'type',
+      props: {
+        strict: {
+          description: 'Indicates whether the query parsing should be strictly compliant with the schema',
+          required: false,
+          defaultValue: { value: 'false' },
+          type: { name: 'boolean' }
+        },
+        flags: {
+          description: 'A list of supported flags',
+          required: false,
+          type: { name: 'string[]' }
+        },
+        fields: {
+          description: 'A dictionary of supported fields',
+          required: false,
+          type: { name: '{ [fieldName]: #SchemaField }' }
+        }
+      }
+    }
+  },
+
+  SchemaField: {
+    __docgenInfo: {
+      _euiObjectType: 'type',
+      props: {
+        type: {
+          description: 'The data type of the field',
+          required: true,
+          type: { name: 'boolean | string | date | number' }
+        },
+        valueDescription: {
+          description: 'A description of the values accepted by this field',
+          required: false,
+          defaultValue: { value: 'the data type' },
+          type: { name: 'string' }
+        },
+        validate: {
+          description: 'A function to validate a possible value for the field. An error should be thrown when ' +
+                       'validation fails (with appropriate error message of course)',
+          required: false,
+          type: { name: '(value) => void' }
         }
       }
     }