Example of Apex code for sending a Story to VersionOne

V1Api.cls

public class V1Api {

  private V1BasicConnector;
  public V1Api(){
    V1BasicConnector = new V1BasicConnector('https://www99.host.com/myInstance', 'admin', 'admin');
  }

  public void CreateStory(V1Story story) 
  {
    Dom.Document doc = new Dom.Document();
    dom.XmlNode root = doc.createRootElement('Asset', null, null);
    for (V1ApiXmlSetterNode node: story.XmlNodes())
    {
      node.AddSetterAttributeNode(root);
    }

    String body = doc.toXmlString();
    system.debug(body);
    V1BasicConnector.HttpPost('Story', body); 
  }
}

V1ApiXmlSetterNode.cls

public interface V1ApiXmlSetterNode {
	void AddSetterAttributeNode(Dom.XmlNode assetRoot);
}

V1AttributeSetMultiRelationNode.cls

public class V1AttributeSetMultiRelationNode implements V1ApiXmlSetterNode {
	public V1AttributeSetMultiRelationNode(String relationName, List<String> values)
	{
		this.RelationName = relationName;
		this.Values = values;
	}
	
	public String RelationName {get; private set;}
	public List<String> Values {get; private set;}
	
	public void AddSetterAttributeNode(Dom.XmlNode assetRoot)
	{
		if (this.Values.size() == 0)
			return;
		
		Dom.Xmlnode node = assetRoot.addChildElement('Relation', null, null);
		node.setAttribute('name', RelationName);
		
		for (String oid: Values)
		{
			Dom.Xmlnode assetRef = node.addChildElement('Asset', null, null);
			assetRef.setAttribute('idref', oid);
			assetRef.setAttribute('act', 'add');
		}
	}
}

V1AttributeSetNode.cls

public class V1AttributeSetNode implements V1ApiXmlSetterNode {
	public V1AttributeSetNode(String attributeName, String value)
	{
		this.AttributeName = attributeName;
		this.Value = value;
	}
	
	public String AttributeName {get; private set;}
	public String Value {get; private set;}
	
	public void AddSetterAttributeNode(Dom.XmlNode assetRoot)
	{
		if (this.Value == null)
			return;
		
		Dom.Xmlnode node = assetRoot.addChildElement('Attribute', null, null);
		node.setAttribute('act', 'set');
		node.setAttribute('name', AttributeName);
		node.addTextNode(Value);
	}

}

V1AttributeSetRelationLookupNode.cls

public class V1AttributeSetRelationLookupNode implements V1ApiXmlSetterNode {
	public V1AttributeSetRelationLookupNode(String relationToType, String value, Map<String, String> lookup)
	{
		this.RelationToType = relationToType;
		this.Value = value;
		this.Lookup = lookup;
	}
	
	public String RelationToType {get; private set;}
	public String Value {get; private set;}
	public Map<String, String> Lookup {get; private set;}
	
	public void AddSetterAttributeNode(Dom.XmlNode assetRoot)
	{
		if (this.Value == null || lookup.size() == 0)
			return;
			
			
		if (!Lookup.containsKey(Value)) // possible error condition?
			return;
		
		Dom.Xmlnode node = assetRoot.addChildElement('Relation', null, null);
		node.setAttribute('act', 'set');
		node.setAttribute('name', RelationToType);
		Dom.Xmlnode assetRef = node.addChildElement('Asset', null, null);
		assetRef.setAttribute('idref', Lookup.get(Value));
	}
}

V1BasicConnector.cls

public class V1BasicConnector {
	
	private string auth64;
	private string instance;
	public static final String DATA_URL = '/rest-1.v1/Data/';
	
	public V1BasicConnector(string instanceRoot, string user, string pass){
		instance = instanceRoot;
		auth64 = EncodingUtil.base64Encode(Blob.valueof(user + ':' + pass));
	}
	
	public HttpResponse HttpGet(string query) 
	{
		string apiQuery = instance + DATA_URL + query;
		
		HttpRequest request = new HttpRequest();        
		request.setMethod('GET');
		request.setEndpoint(apiQuery);
		request.setHeader('Authorization', 'Basic ' + auth64); 
		
		system.debug(request.getEndpoint());
		
		Http http = new Http();
		HttpResponse response = http.send(request);
		return response;
	}
    
    public HttpResponse HttpPost(string assetSlashId, string xmlPayload) 
    {
    	string apiQuery = instance + DATA_URL + assetSlashId;
    	
	HttpRequest request = new HttpRequest();        
        request.setMethod('POST');
        request.setEndpoint(apiQuery);
        request.setHeader('Content-Type', 'application/x-www-form-urlencoded');
        request.setHeader('Authorization', 'Basic ' + auth64); 
 	request.setBody(xmlPayload);
 	request.setHeader('Content-Length', String.valueOf(xmlPayload.length()));
        
        system.debug(request.getEndpoint());
        
        Http http = new Http();
        HttpResponse response = http.send(request);
        return response;
    }
}

V1Story.cls

public class V1Story {
	
	public V1Story()
	{
		FillMappings();	
	}
	
	private Map<String, String> PriorityLookup;
	private void FillMappings()
	{
		PriorityLookup = new Map<String, String>(); //should this be file-driven
		PriorityLookup.put('High', 'StoryPriority:200');
		PriorityLookup.put('Medium', 'StoryPriority:201');
		PriorityLookup.put('Low', 'StoryPriority:202');
	}
	
	public String Title {get; set;}
  	public String Description {get; set;}  
	public String Scope {get; set;}
	public String Category {get; set;}
 	public String Priority {get;set;}
  
  	public List<V1ApiXmlSetterNode> XmlNodes()
	{
		List<V1ApiXmlSetterNode> nodes = new List<V1ApiXmlSetterNode>();
		
		nodes.add(new V1AttributeSetNode('Name', Title));
		nodes.add(new V1AttributeSetNode('Description', Description));
		nodes.add(new V1AttributeSetRelationNode('Scope', 'Scope:1003'));
		nodes.add(new V1AttributeSetRelationNode('Category', StoryTypeCategoryID));
		nodes.add(new V1AttributeSetRelationLookupNode('Priority', Priority, PriorityLookup));
		nodes.add(new V1AttributeSetNode('Custom_MyCustomField', customField));
		
		return nodes;		
	}
}