package com.mozilla.bespin.controllers;import com.mozilla.bespin.EditSession;import com.mozilla.bespin.RequiresLogin;import org.json.simple.JSONArray;import org.json.simple.JSONObject;import org.json.simple.JSONValue;import java.io.IOException;import java.util.ArrayList;import java.util.List;public class Edit extends BespinController {    @RequiresLogin    public void list() throws IOException {        JSONArray array = new JSONArray();        String path = getPath();        List<JSONObject> edits = getEdits(path);        array.addAll(edits);        print(array.toString());    }    @RequiresLogin    public void recent() throws IOException {        int editIndex;        try {            editIndex = Integer.parseInt(getCtx().popParam());        } catch (Exception e) {            getCtx().getResp().sendError(400, "Couldn't get index of recent edit");            return;        }        String path = getPath();        List<JSONObject> editList = getEdits(path);        JSONArray array = new JSONArray();        array.addAll(editList.subList(editIndex, editList.size()));        print(array.toString());    }    @RequiresLogin    public void put() throws IOException {        String path = getPath();        String json = getBody();        Object obj = JSONValue.parse(json);        if (obj instanceof JSONArray) {            JSONArray array = (JSONArray) obj;            addEdits(path, (JSONObject[]) array.toArray(new JSONObject[0]));        } else {            addEdits(path, (JSONObject) obj);        }    }    @RequiresLogin    public void reset() throws IOException {        if (getCtx().getParameterList().size() == 0) {            getSessionTracker().resetEdits();        } else {            java.io.File file = getFilesystem().getFileHandle(getUser(), getPath());            getSessionTracker().resetEdits(file);        }    }    private void addEdits(String path, JSONObject... edits) throws IOException {        // first get the file handle        java.io.File file = getFilesystem().getFileHandle(getUser(), path);        // get the edit session        EditSession editSession = getSessionTracker().getSession(file, getUser());        if (editSession == null) {            getCtx().getResp().sendError(400, "No edit session open for file");            return;        }        editSession.addEdits(edits);    }    /**     * Returns a copy of the list of edits for a given file     *     * @param path     * @return     */    private List<JSONObject> getEdits(String path) throws IOException {        // first get the file handle        java.io.File file = getFilesystem().getFileHandle(getUser(), path);        // get the edit session        EditSession editSession = getSessionTracker().getSession(file, getUser());        if (editSession != null) {            return editSession.getEdits();        } else {            return new ArrayList<JSONObject>();        }    }}