Script Runner groovy script help

[Travis Alexander [Empyra]]

I'm just going to throw this out there.. 

Can anyone write me a (or copy paste a similar) groovy script that I can use as a post function that will auto-assign the issue based on conditions?

A single post function will need a script with the following logic:

IF Custom Field = "A" AND Issue Type = Story THEN set assignee to 'talexander'

IF Custom Field = "B" AND Issue Type = Story THEN set assignee to 'tsmith'

IF Custom Field = "A" AND Issue Type = Task THEN set assignee to 'bjones'

etc.. 

Jira 7.10.X

Thanks in advance!

[Alvin]

Maybe this could help. try to change instead of custom field value, get the issuetype

import com.atlassian.jira.component.ComponentAccessor;
import com.atlassian.jira.issue.CustomFieldManager;
import com.atlassian.jira.issue.fields.CustomField;
import com.atlassian.jira.issue.IssueManager;
import com.atlassian.jira.issue.Issue;
import com.atlassian.jira.user.util.UserManager;
import com.atlassian.jira.issue.MutableIssue

def issueManager = ComponentAccessor.getIssueManager();
def userManager = ComponentAccessor.getUserManager();
def customFieldManager = ComponentAccessor.getCustomFieldManager();
def cField = customFieldManager.getCustomFieldObject("customfield_12400");
def cFieldValue = issue.getCustomFieldValue(cField);

if (cFieldValue.toString() == "Security") {
 def assignee = userManager.getUserByKey("i849194");
 issue.setAssignee(assignee);
}
else if (cFieldValue.toString() == "Operations") {
 def assignee = userManager.getUserByKey("i826121");
 issue.setAssignee(assignee);
}

else if (cFieldValue.toString() == "Instance Creations/Backups") {
 def assignee = userManager.getUserByKey("i825046");
 issue.setAssignee(assignee);
}