jspwiki-main/src/main/java/org/apache/wiki/workflow/WorkflowManager.java

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    to you under the Apache License, Version 2.0 (the
    "License"); you may not use this file except in compliance
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       http://www.apache.org/licenses/LICENSE-2.0

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package org.apache.wiki.workflow;

import org.apache.wiki.WikiEngine;
import org.apache.wiki.WikiSession;
import org.apache.wiki.api.exceptions.WikiException;

import java.security.Principal;
import java.util.List;
import java.util.Properties;
import java.util.Set;


/**
 * <p>
 * Monitor class that tracks running Workflows. The WorkflowManager also keeps track of the names of users or groups expected to approve
 * particular Workflows.
 * </p>
 */
public interface WorkflowManager {

    /** The workflow attribute which stores the wikiContext. */
    String WF_WP_SAVE_ATTR_PRESAVE_WIKI_CONTEXT = "wikiContext";
    /** The name of the key from jspwiki.properties which defines who shall approve the workflow of storing a wikipage.  Value is <tt>{@value}</tt> */
    String WF_WP_SAVE_APPROVER = "workflow.saveWikiPage";
    /** The message key for storing the Decision text for saving a page.  Value is {@value}. */
    String WF_WP_SAVE_DECISION_MESSAGE_KEY = "decision.saveWikiPage";
    /** The message key for rejecting the decision to save the page.  Value is {@value}. */
    String WF_WP_SAVE_REJECT_MESSAGE_KEY = "notification.saveWikiPage.reject";
    /** Fact name for storing the page name.  Value is {@value}. */
    String WF_WP_SAVE_FACT_PAGE_NAME = "fact.pageName";
    /** Fact name for storing a diff text. Value is {@value}. */
    String WF_WP_SAVE_FACT_DIFF_TEXT = "fact.diffText";
    /** Fact name for storing the current text.  Value is {@value}. */
    String WF_WP_SAVE_FACT_CURRENT_TEXT = "fact.currentText";
    /** Fact name for storing the proposed (edited) text.  Value is {@value}. */
    String WF_WP_SAVE_FACT_PROPOSED_TEXT = "fact.proposedText";
    /** Fact name for storing whether the user is authenticated or not.  Value is {@value}. */
    String WF_WP_SAVE_FACT_IS_AUTHENTICATED = "fact.isAuthenticated";

    /** The workflow attribute which stores the user profile. */
    String WF_UP_CREATE_SAVE_ATTR_SAVED_PROFILE = "userProfile";
    /** The name of the key from jspwiki.properties which defines who shall approve the workflow of creating a user profile.  Value is <tt>{@value}</tt> */
    String WF_UP_CREATE_SAVE_APPROVER = "workflow.createUserProfile";
    /** The message key for storing the Decision text for saving a user profile.  Value is {@value}. */
    String WF_UP_CREATE_SAVE_DECISION_MESSAGE_KEY = "decision.createUserProfile";
    /** Fact name for storing a the submitter name. Value is {@value}. */
    String WF_UP_CREATE_SAVE_FACT_SUBMITTER = "fact.submitter";
    /** Fact name for storing the preferences' login name. Value is {@value}. */
    String WF_UP_CREATE_SAVE_FACT_PREFS_LOGIN_NAME = "prefs.loginname";
    /** Fact name for storing the preferences' full name. Value is {@value}. */
    String WF_UP_CREATE_SAVE_FACT_PREFS_FULL_NAME = "prefs.fullname";
    /** Fact name for storing the preferences' email. Value is {@value}. */
    String WF_UP_CREATE_SAVE_FACT_PREFS_EMAIL = "prefs.email";

    /** The prefix to use for looking up <code>jspwiki.properties</code> approval roles. */
    String PROPERTY_APPROVER_PREFIX = "jspwiki.approver.";

    /**
     * Adds a new workflow to the set of workflows and starts it. The new workflow is automatically assigned a unique ID. If another
     * workflow with the same ID already exists, this method throws a WikIException.
     *
     * @param workflow the workflow to start
     * @throws WikiException if a workflow the automatically assigned ID already exist; this should not happen normally
     */
    void start( Workflow workflow ) throws WikiException;

    /**
     * Returns a collection of the currently active workflows.
     *
     * @return the current workflows
     */
    Set< Workflow > getWorkflows();

    /**
     * Returns a collection of finished workflows; that is, those that have aborted or completed.
     *
     * @return the finished workflows
     */
    List< Workflow > getCompletedWorkflows();

    /**
     * Initializes the WorkflowManager using a specfied WikiEngine and properties. Any properties that begin with
     * {@link #PROPERTY_APPROVER_PREFIX} will be assumed to be Decisions that require approval. For a given property key, everything
     * after the prefix denotes the Decision's message key. The property value indicates the Principal (Role, GroupPrincipal, WikiPrincipal)
     * that must approve the Decision. For example, if the property key/value pair is {@code jspwiki.approver.workflow.saveWikiPage=Admin},
     * the Decision's message key is <code>workflow.saveWikiPage</code>. The Principal <code>Admin</code> will be resolved via
     * {@link org.apache.wiki.auth.AuthorizationManager#resolvePrincipal(String)}.
     *
     * @param engine the wiki engine to associate with this WorkflowManager
     * @param props the wiki engine's properties
     */
    void initialize( WikiEngine engine, Properties props );

    /**
     * Returns <code>true</code> if a workflow matching a particular key contains an approval step.
     *
     * @param messageKey the name of the workflow; corresponds to the value returned by {@link Workflow#getMessageKey()}.
     * @return the result
     */
    boolean requiresApproval( String messageKey );

    /**
     * Looks up and resolves the actor who approves a Decision for a particular Workflow, based on the Workflow's message key.
     * If not found, or if Principal is Unresolved, throws WikiException. This particular implementation always returns the
     * GroupPrincipal <code>Admin</code>
     *
     * @param messageKey the Decision's message key
     * @return the actor who approves Decisions
     * @throws WikiException if the message key was not found, or the
     * Principal value corresponding to the key could not be resolved
     */
    Principal getApprover( String messageKey ) throws WikiException;

    /**
     * Returns the DecisionQueue associated with this WorkflowManager
     *
     * @return the decision queue
     */
    DecisionQueue getDecisionQueue();

    /**
     * Returns the current workflows a wiki session owns. These are workflows whose {@link Workflow#getOwner()} method returns a Principal
     * also possessed by the wiki session (see {@link org.apache.wiki.WikiSession#getPrincipals()}). If the wiki session is not
     * authenticated, this method returns an empty Collection.
     *
     * @param session the wiki session
     * @return the collection workflows the wiki session owns, which may be empty
     */
    List< Workflow > getOwnerWorkflows( WikiSession session );

}