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package com.google.refine.commands.project;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.google.refine.ProjectManager;
import com.google.refine.ProjectMetadata;
import com.google.refine.commands.Command;
import com.google.refine.model.Project;

public class SetProjectMetadataCommand extends Command {

    @Override
    public void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        if (!hasValidCSRFToken(request)) {
            respondCSRFError(response);
            return;
        }

        Project project = request.getParameter("project") != null ? getProject(request) : null;
        String metaName = request.getParameter("name");
        String valueString = request.getParameter("value");
        ProjectMetadata meta = null;

        if (project == null) {
            respond(response, "{\"code\":\"error\",\"message\":\"Project cannot be found\"}");
            return;
        }

        meta = project.getMetadata();
        try {
            response.setCharacterEncoding("UTF-8");
            response.setHeader("Content-Type", "application/json");

            meta.setAnyField(metaName, valueString);
            ProjectManager.singleton.saveMetadata(meta, project.id);

            respond(response, "{ \"code\" : \"ok\" }");
        } catch (Exception e) {
            respondException(response, e);
        }
    }

}