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fgdata/Aircraft/Generic/autochecklist.nas

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################################################################################
#
# Automated Checklists
#
# Copyright (c) 2015, Richard Senior
#
# 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., 51 Franklin Street, Fifth Floor, Boston,
# MA 02110-1301, USA.
#
################################################################################
#
# This script runs the bindings in a sequence of checklists. Typically used
# to implement autostart or shutdown but can run any checklist sequence at any
# time. Checklist execution runs each binding where the condition is not yet
# satisfied and waits until the condition becomes true before moving on. If
# the condition does not become true within a timeout period, the checklist
# execution fails.
#
# Can also run in no wait mode where items are run in order without waiting
# for the previous condition to become true. Checklists never timeout or fail
# in no wait mode but some conditions may remain false.
#
# Typical usage:
#
# 1. Add this script to <Aircraft>-set.xml:
#
# <nasal>
# ... other scripts here
# <autochecklist>
# <file>Aircraft/Generic/autochecklist.nas</file>
# </autochecklist>
# </nasal>
#
# 2. In the <Aircraft>-set.xml, define a list of checklist indexes to run
# as a named sequence.
#
# For example, to run checklists with indexes 0 and 1 for startup and
# checklist 9 for shutdown:
#
# <checklists>
# <checklist include="Checklists/before-starting-engines.xml"/>
# <checklist include="Checklists/start-engines.xml"/>
# ... more checklists here
# <checklist include="Checklists/parking.xml"/>
# <startup>
# <index n="0">0</index> <!-- Before starting engines -->
# <index n="1">1</index> <!-- Start engines -->
# </startup>
# <shutdown>
# <index n="0">9</index> <!-- Parking -->
# </startup>
# </checklists>
#
# 3. Define a menu item that calls the complete_checklists function with
# the name of the checklist sequence you would like to run.
#
# For example:
#
# <item>
# <label>Autostart</label>
# <binding>
# <command>nasal</command>
# <script>autochecklist.complete_checklists("startup");</script>
# </binding>
# </item>
#
# For a no wait checklist execution (which will never fail), pass zero (0)
# as the second argument:
#
# autochecklist.complete_checklists(sequence:"startup", wait:0);
#
# 4. Optionally, configure automated execution using the following properties.
# See comments within the autochecklist_init function for a description.
#
# <checklists>
# ...
# <auto>
# <completed-message>Checklists complete</completed-message>
# <startup-message>Running checklists, please wait ...</startup-message>
# <timeout-message>Some checks failed.</timeout-message>
# <timeout-sec>10</timeout-sec>
# <wait-sec>3</wait-sec>
# <auto>
# </checklists>
#
# Note that messages are not displayed for no wait execution.
#
################################################################################
var checklists = nil;
var auto = nil;
var active = nil;
var expedited = nil;
var timeout_sec = nil;
var timeout_start = nil;
var wait_sec = nil;
var completed_message = nil;
var startup_message = nil;
var timeout_message = nil;
var autochecklist_init = func()
{
# Root property tree path for checklists
#
checklists = props.globals.getNode("sim/checklists");
# Root property tree path for auto checklists
#
auto = checklists.initNode("auto");
# Flag to indicate that checklists are being completed automatically.
# This can be used in Nasal bindings in the checklists to suppress a
# binding when automated execution is in progress, e.g. for checklist
# items that display dialogs.
#
active = auto.initNode("active", 0, "BOOL");
# Flag to indicate that checklist execution is expedited, i.e. there
# is no wait time between items. Typically indicates an in-air start. Note
# that the expedited flag does not imply automated checklists are active.
#
expedited = auto.initNode("expedited", 0, "BOOL");
# Timeout for completion of a checklist item. If the previous condition
# is still not satisifed after this timeout, the checklist fails.
#
timeout_sec = auto.initNode("timeout-sec", 10, "INT");
timeout_start = auto.initNode("timeout-start", 0.0, "DOUBLE");
# If the previous checklist item is not complete, the process waits
# this number of seconds before trying again.
#
wait_sec = auto.initNode("wait-sec", 3, "INT");
# Messages
#
completed_message = auto.initNode("completed-message",
"Checklists complete."
);
startup_message = auto.initNode("startup-message",
"Running checklists, please wait ..."
);
timeout_message = auto.initNode("timeout-message",
"Some checks failed. Try completing checklist manually."
);
}
################################################################################
# Announces a message to the pilot
#
# @param message: the message to display
#
var announce = func(message)
{
setprop("sim/messages/copilot", message);
logprint(3, message);
}
# Resets the timestamp used for checking timeouts
#
var reset_timeout = func()
{
timeout_start.setValue(0.0);
}
# Return true if the timeout period has been exceeded
#
var timed_out = func()
{
var elapsed = getprop("sim/time/elapsed-sec") - timeout_start.getValue();
return timeout_start.getValue() and elapsed > timeout_sec.getValue();
}
# Waits for the completion of an item, setting a timestamp for timeouts
#
# @param node: the node containing the list of checklist indexes to run
# @param from: the checklist item node from which to start
#
var wait_for_completion = func(node, from)
{
var t = maketimer(wait_sec.getValue(), func {
complete(node, 1, from);
});
t.singleShot = 1;
t.start();
if (!timeout_start.getValue()) {
timeout_start.setValue(getprop("sim/time/elapsed-sec"));
}
}
# Automatically complete a set of checklists defined by a series of indexes
# listed under the node argument. Not intended to be called from outside this
# script.
#
# @param node: the node containing the list of checklist indexes to run
# @param wait: whether to wait for the preceding binding to complete
# @param from: the checklist item node from which to start, default nil
#
var complete = func(node, wait, from = nil)
{
var previous_condition = nil;
var skipping = from != nil;
foreach (var index; node.getChildren("index")) {
var checklist = checklists.getChild("checklist", index.getValue());
foreach (var item; checklist.getChildren("item")) {
var condition = item.getNode("condition");
if (skipping) {
if (!item.equals(from)) {
previous_condition = condition;
continue;
}
skipping = 0;
}
if (wait) {
if (props.condition(previous_condition)) {
reset_timeout();
} else {
if (timed_out()) {
var title = checklist.getNode("title").getValue();
announce(title~": "~timeout_message.getValue());
} else {
wait_for_completion(node: node, from: item);
}
return;
}
}
if (!props.condition(condition)) {
foreach (var binding; item.getChildren("binding")) {
active.setValue(1);
props.runBinding(binding);
active.setValue(0);
}
}
previous_condition = condition;
}
}
if (wait) {
announce(completed_message.getValue());
}
}
################################################################################
# Complete a checklist sequence, typically called from a Nasal binding in a
# menu, e.g. Autostart, but could be assigned to a controller button or even
# called from a listener.
#
# @param sequence: the name of the checklist sequence to run
# @param wait: whether to wait for the preceding binding, default 1 (true)
#
var complete_checklists = func(sequence, wait = 1)
{
var node = checklists.getNode(sequence);
if (node != nil) {
if (wait) {
announce(startup_message.getValue());
}
expedited.setValue(!wait);
complete(node, wait);
} else {
announce("Could not find checklist sequence called '"~sequence~"'");
}
}
setlistener("/sim/signals/fdm-initialized", func() {
autochecklist_init();
});