Updated APIv5 (markdown)

APIv5.md

@@ -11,6 +11,68 @@ API module Version | Plan Version
 -- | --
 0.0.3 | 4.8.0
 
+## Checking if some part of an API is available
+
+> This section is about API v0.0.4 which is set for release with 4.8.2
+
+<details>
+<summary>API module dependency information</summary>
+
+Plan API is distributed via Bintray repository:
+```
+<repository>
+    <snapshots>
+        <enabled>false</enabled>
+    </snapshots>
+    <id>bintray-rsl1122-Plan-repository</id>
+    <name>bintray</name>
+    <url>https://dl.bintray.com/rsl1122/Plan-repository</url>
+</repository>
+```
+
+```
+<dependency>
+    <groupId>com.djrapitops</groupId>
+    <artifactId>Plan-api</artifactId>
+    <version>...</version>
+</dependency>
+```
+
+Dependency version information can be found here:
+https://bintray.com/rsl1122/Plan-repository/Plan-API
+
+Remember to add `"Plan"` as a softdependency to your plugin information (plugin.yml / Plugin annotation).
+
+</details>
+
+<details>
+<summary>Checking if the API supports a capability</summary>
+
+- `CapabilityService` allows you to ensure that Plan version on the server has all the API capabilities you need available.
+- All Plan API related things should be done in it's own class to avoid NoClassDefFoundError if Plan is not installed. Below is an example of a capability check.
+
+```
+class ClassWhereYouDoAllPlanThings {
+    
+    public boolean areAllCapabilitiesAvailable() {
+        try {
+            CapabilityService capabilities = CapabilityService.getInstance();
+            return capabilities.hasCapability("DATA_EXTENSION_VALUES") && ...;
+        } catch (NoClassDefFoundError e) {
+            return false;
+        }
+    }
+
+    public void doOtherPlanThings() {...}
+
+}
+```
+
+- Capability names can be found in `com.djrapitops.plan.capability.Capability` enum. Please note that this class is package private to avoid direct calls that might lead to NoSuchFieldError.
+- The required capabilities are listed in the documentations below.
+
+</details>
+
 ## DataExtension API
 
 - [Documentation for DataExtension API](https://github.com/plan-player-analytics/Plan/wiki/APIv5---DataExtension-API)