/*
 * prof_set.c --- routines that expose the public interfaces for
 *      inserting, updating and deleting items from the profile.
 *
 * WARNING: These routines only look at the first file opened in the
 * profile.  It's not clear how to handle multiple files, actually.
 * In the future it may be necessary to modify this public interface,
 * or possibly add higher level functions to support this correctly.
 *
 * WARNING: We're not yet doing locking yet, either.
 *
 */

#include "prof_int.h"

#include <stdio.h>
#include <string.h>
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#include <errno.h>

static errcode_t rw_setup(profile_t profile)
{
        prf_file_t      file;
        errcode_t       retval = 0;

        if (!profile)
                return PROF_NO_PROFILE;

        if (profile->magic != PROF_MAGIC_PROFILE)
                return PROF_MAGIC_PROFILE;

        file = profile->first_file;

        retval = profile_lock_global();
        if (retval)
            return retval;

        /* Don't update the file if we've already made modifications */
        if (file->data->flags & PROFILE_FILE_DIRTY) {
            profile_unlock_global();
            return 0;
        }

        if ((file->data->flags & PROFILE_FILE_SHARED) != 0) {
            prf_data_t new_data;
            new_data = profile_make_prf_data(file->data->filespec);
            if (new_data == NULL) {
                retval = ENOMEM;
            } else {
                retval = k5_mutex_init(&new_data->lock);
                if (retval == 0) {
                    new_data->root = NULL;
                    new_data->flags = file->data->flags & ~PROFILE_FILE_SHARED;
                    new_data->timestamp = 0;
                    new_data->upd_serial = file->data->upd_serial;
                }
            }

            if (retval != 0) {
                profile_unlock_global();
                free(new_data);
                return retval;
            }
            profile_dereference_data_locked(file->data);
            file->data = new_data;
        }

        profile_unlock_global();
        retval = profile_update_file(file);

        return retval;
}


/*
 * Delete or update a particular child node
 *
 * ADL - 2/23/99, rewritten TYT 2/25/99
 */
errcode_t KRB5_CALLCONV
profile_update_relation(profile_t profile, const char **names,
                        const char *old_value, const char *new_value)
{
        errcode_t       retval;
        struct profile_node *section, *node;
        void            *state;
        const char      **cpp;

        retval = rw_setup(profile);
        if (retval)
                return retval;

        if (names == 0 || names[0] == 0 || names[1] == 0)
                return PROF_BAD_NAMESET;

        if (!old_value || !*old_value)
                return PROF_EINVAL;

        retval = k5_mutex_lock(&profile->first_file->data->lock);
        if (retval)
            return retval;
        section = profile->first_file->data->root;
        for (cpp = names; cpp[1]; cpp++) {
                state = 0;
                retval = profile_find_node(section, *cpp, 0, 1,
                                           &state, &section);
                if (retval) {
                    k5_mutex_unlock(&profile->first_file->data->lock);
                    return retval;
                }
        }

        state = 0;
        retval = profile_find_node(section, *cpp, old_value, 0, &state, &node);
        if (retval == 0) {
            if (new_value)
                retval = profile_set_relation_value(node, new_value);
            else
                retval = profile_remove_node(node);
        }
        if (retval == 0)
            profile->first_file->data->flags |= PROFILE_FILE_DIRTY;
        k5_mutex_unlock(&profile->first_file->data->lock);

        return retval;
}

/*
 * Clear a particular all of the relations with a specific name.
 *
 * TYT - 2/25/99
 */
errcode_t KRB5_CALLCONV
profile_clear_relation(profile_t profile, const char **names)
{
        errcode_t       retval;
        struct profile_node *section, *node;
        void            *state;
        const char      **cpp;

        retval = rw_setup(profile);
        if (retval)
                return retval;

        if (names == 0 || names[0] == 0 || names[1] == 0)
                return PROF_BAD_NAMESET;

        section = profile->first_file->data->root;
        for (cpp = names; cpp[1]; cpp++) {
                state = 0;
                retval = profile_find_node(section, *cpp, 0, 1,
                                           &state, &section);
                if (retval)
                        return retval;
        }

        state = 0;
        do {
                retval = profile_find_node(section, *cpp, 0, 0, &state, &node);
                if (retval)
                        return retval;
                retval = profile_remove_node(node);
                if (retval)
                        return retval;
        } while (state);

        profile->first_file->data->flags |= PROFILE_FILE_DIRTY;

        return 0;
}

/*
 * Rename a particular section; if the new_section name is NULL,
 * delete it.
 *
 * ADL - 2/23/99, rewritten TYT 2/25/99
 */
errcode_t KRB5_CALLCONV
profile_rename_section(profile_t profile, const char **names,
                       const char *new_name)
{
        errcode_t       retval;
        struct profile_node *section, *node;
        void            *state;
        const char      **cpp;

        retval = rw_setup(profile);
        if (retval)
                return retval;

        if (names == 0 || names[0] == 0 || names[1] == 0)
                return PROF_BAD_NAMESET;

        retval = k5_mutex_lock(&profile->first_file->data->lock);
        if (retval)
            return retval;
        section = profile->first_file->data->root;
        for (cpp = names; cpp[1]; cpp++) {
                state = 0;
                retval = profile_find_node(section, *cpp, 0, 1,
                                           &state, &section);
                if (retval) {
                    k5_mutex_unlock(&profile->first_file->data->lock);
                    return retval;
                }
        }

        state = 0;
        retval = profile_find_node(section, *cpp, 0, 1, &state, &node);
        if (retval == 0) {
            if (new_name)
                retval = profile_rename_node(node, new_name);
            else
                retval = profile_remove_node(node);
        }
        if (retval == 0)
            profile->first_file->data->flags |= PROFILE_FILE_DIRTY;
        k5_mutex_unlock(&profile->first_file->data->lock);
        return retval;
}

/*
 * Insert a new relation.  If the new_value argument is NULL, then
 * create a new section instead.
 *
 * Note: if the intermediate sections do not exist, this function will
 * automatically create them.
 *
 * ADL - 2/23/99, rewritten TYT 2/25/99
 */
errcode_t KRB5_CALLCONV
profile_add_relation(profile_t profile, const char **names,
                     const char *new_value)
{
        errcode_t       retval;
        struct profile_node *section;
        const char      **cpp;
        void            *state;

        retval = rw_setup(profile);
        if (retval)
                return retval;

        if (names == 0 || names[0] == 0 || names[1] == 0)
                return PROF_BAD_NAMESET;

        retval = k5_mutex_lock(&profile->first_file->data->lock);
        if (retval)
            return retval;
        section = profile->first_file->data->root;
        for (cpp = names; cpp[1]; cpp++) {
                state = 0;
                retval = profile_find_node(section, *cpp, 0, 1,
                                           &state, &section);
                if (retval == PROF_NO_SECTION)
                        retval = profile_add_node(section, *cpp, 0, &section);
                if (retval) {
                    k5_mutex_unlock(&profile->first_file->data->lock);
                    return retval;
                }
        }

        if (new_value == 0) {
                retval = profile_find_node(section, *cpp, 0, 1, &state, 0);
                if (retval == 0) {
                    k5_mutex_unlock(&profile->first_file->data->lock);
                    return PROF_EXISTS;
                } else if (retval != PROF_NO_SECTION) {
                    k5_mutex_unlock(&profile->first_file->data->lock);
                    return retval;
                }
        }

        retval = profile_add_node(section, *cpp, new_value, 0);
        if (retval) {
            k5_mutex_unlock(&profile->first_file->data->lock);
            return retval;
        }

        profile->first_file->data->flags |= PROFILE_FILE_DIRTY;
        k5_mutex_unlock(&profile->first_file->data->lock);
        return 0;
}