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/*
* SPL - The SPL Programming Language
* Copyright (C) 2004, 2005 Clifford Wolf <clifford@clifford.at>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* mod_wsf_edit_sql.spl: A WSF Edit Component for SQL databases
*/
/**
* A module which provides a generic component for editing records in SQL
* databases, based on [[wsf_edit:WsfEdit]].
*/
load "sql";
load "wsf_edit";
/**
* A WSF Component for editing records in SQL databases.
*
* E.g. there is a database handle 'db' (see [[sql:]]) for accessing a database
* with a table 'user'. In this table exist the fields 'firstname' and
* 'lastname' which should be editable using this comonent. Records are indexed
* using the field 'userid'. The field 'username' should be displayed in the
* form, but is not editable. Creating an editor for record 42 in this table
* could look like this:
*
* var editor = new WsfEditSql(42, db, "user", "userid",
* function() { return #file-as-template *edit_template; });
*
* #embedded-file edit_template END-OF-TEMPLATE
* <form id="$id" ${add_action(cgi.url)}>
* Editing user '${edit_data.username}': <br/>
* Realname: ${edit_input("", "60", "realname")} <br/>
* Firstname: ${edit_input("", "60", "firstname")}
* </form>
* END-OF-TEMPLATE
*
* This object is derived from [[wsf_edit:WsfEdit]].
*/
object WsfEditSql WsfEdit
{
/**
* The ID of the record in the databse.
* This is looked up in field [[.spl_key]].
*/
var sql_id;
/**
* The database handle.
*/
var sql_db;
/**
* The table name.
*/
var sql_table;
/**
* The field which is used to find the record to be edited.
* (see also [[.spl_id]])
*/
var sql_key;
/**
* The function which evaluates the template. When executed, this will
* be context-dispatched to this object (using the '*' operator).
*/
var get_html_core;
/**
* Overloaded [[wsf_edit:WsfEdit.edit_load()]].
*/
method edit_load()
{
var r = sql(sql_db, "select * from $sql_table where ${sql_key} = ${sql::sql_id} limit 1");
edit_data = r.[0];
}
/**
* Overloaded [[wsf_edit:WsfEdit.edit_save()]].
*/
method edit_save()
{
var query = "update $sql_table set";
var delim = "";
foreach i (edit_fields) {
if (declared cgi.param.["edit_${edit_fields.[i]}"]) {
query ~= "${delim} ${edit_fields.[i]} = ${sql::cgi.param.["edit_${edit_fields.[i]}"]}";
delim = ",";
}
}
if (delim ~== ",") {
query ~= " where ${sql_key} = ${sql::sql_id}";
sql(sql_db, query);
just_updated = 1;
} else {
just_updated = 0;
}
}
/**
* Overloaded [[wsf_edit:WsfEdit.get_html()]].
*
* Simply calls [[.get_html_core]] (context-dispatched to this object)
* to do the real work.
*/
method get_html()
{
edit_reset();
return *get_html_core();
}
/**
* The Constructor.
*
* The parameters are simply copyied to the variables described
* above.
*
* See the general discription of this object ([[WsfEditSql]]) for
* a usage example.
*/
method init(_sql_id, _sql_db, _sql_table, _sql_key, _get_html_core)
{
sql_id = _sql_id;
sql_db = _sql_db;
sql_table = _sql_table;
sql_key = _sql_key;
get_html_core = _get_html_core;
return *WsfEdit.init();
}
}
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