Add functions docs page

Signed-off-by: davidarendsen <davidarendsen@hey.com>

docs/00-index.md

@@ -5,6 +5,7 @@ Welcome to the documentation of the PHP Flux Query Builder.
 * [Getting started](01-getting-started.md)
 * [InfluxDB concepts](02-what-is-influxdb.md)
 * [What is Flux?](03-what-is-flux.md)
+* [Functions](04-functions.md)
 * [Official InfluxDB documentation](https://docs.influxdata.com/influxdb/v2.6/query-data/flux/)
 
 

docs/01-getting-started.md

@@ -21,8 +21,8 @@ $queryBuilder->fromBucket('test_bucket')
     ->fromMeasurement('test_measurement')
     ->addFieldFilter(['username', 'email'])
     ->addKeyFilter(
-        KeyFilter::setEqualTo('_field', 'username')
-            ->orEqualTo('_field', 'email')
+        KeyFilter::setEqualTo('username', 'David')
+            ->andEqualTo('email', 'david@example.com')
     )
     ->limit(50, 100);
 
@@ -39,7 +39,9 @@ from(bucket: "test_bucket")
         r._field == "username" or r._field == "email"
     ) 
     |> filter(fn: (r) => 
-        r._field == "username" or r._field == "email"
+        r.username == "David" and r.email == "david@example.com"
     ) 
     |> limit(n: 50, offset: 100)
-```
+```
+
+For a deeper dive into the possible methods of the Query builder you can check [this page](04-functions.md).

docs/04-functions.md

@@ -0,0 +1,73 @@
+# Flux Query Builder Docs
+
+## Functions
+
+On this page you will find the methods you can use in the query builder.
+
+### addAggregateWindow()
+
+**Parameters:**
+
+<table>
+  <tbody>
+    <tr>
+      <th>Name</th>
+      <th>Data type</th>
+      <th>Description</th>
+      <th>Example</th>
+    </tr>
+    <tr>
+      <td>every</td>
+      <td>string</td>
+      <td>Duration of time between windows.</td>
+      <td>20s</td>
+    </tr>
+    <tr>
+      <td>fn</td>
+      <td>string</td>
+      <td>Aggregate or selector function to apply to each time window.</td>
+      <td>mean</td>
+    </tr>
+    <tr>
+      <td>options</td>
+      <td>array</td>
+      <td>
+        <ul>
+          <li>
+            period (string): <i>Duration of windows. Default is the 'every' value.</i>
+          </li>
+          <li>
+            offset (string): <i>Duration to shift the window boundaries by. Default is '0s'.</i>
+          </li>
+          <li>
+            location (string): <i>Location used to determine timezone. Default is the 'location' option.</i>
+          </li>
+          <li>
+            column (string): <i>Column to operate on.</i>
+          </li>
+          <li>
+            timeSrc (string): <i>Column to use as the source of the new time value for aggregate values. Default is '_stop'.</i>
+          </li>
+          <li>
+            timeDst (string): <i>Column to store time values for aggregate values in. Default is '_time'.</i>
+          </li>
+          <li>
+            createEmpty (boolean): <i>Create empty tables for empty window. Default is true.</i>
+          </li>
+        </ul>
+      </td>
+      <td>
+        <ul>
+          <li>period: <i>'every'</i></li>
+          <li>offset: <i>'2s'</i></li>
+          <li>location: <i>'location'</i></li>
+          <li>column: <i>'_value'</i></li>
+          <li>timeSrc: <i>'_stop'</i></li>
+          <li>timeDst: <i>'_time'</i></li>
+          <li>createEmpty: <i>false</i></li>
+        </ul>
+      </td>
+    </tr>
+
+  </tbody>
+</table>