enigma-bbs/core/view_controller.js

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JavaScript
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/* jslint node: true */
'use strict';
// ENiGMA½
var MCIViewFactory = require('./mci_view_factory.js').MCIViewFactory;
var menuUtil = require('./menu_util.js');
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//var Log = require('./logger.js').log;
var Config = require('./config.js').config;
var asset = require('./asset.js');
var ansi = require('./ansi_term.js');
var events = require('events');
var util = require('util');
var assert = require('assert');
var async = require('async');
var _ = require('lodash');
var paths = require('path');
exports.ViewController = ViewController;
var MCI_REGEXP = /([A-Z]{2})([0-9]{1,2})/;
function ViewController(options) {
assert(_.isObject(options));
assert(_.isObject(options.client));
events.EventEmitter.call(this);
var self = this;
this.client = options.client;
this.views = {}; // map of ID -> view
this.formId = options.formId || 0;
this.mciViewFactory = new MCIViewFactory(this.client);
this.submitKeyMap = {};
this.clientKeyPressHandler = function(ch, key) {
//
// Process key presses treating form submit mapped keys special.
// Everything else is forwarded on to the focused View, if any.
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//
if(key) {
var submitViewId = self.submitKeyMap[key.name];
if(submitViewId) {
self.switchFocus(submitViewId);
self.submitForm();
return;
}
}
if(self.focusedView && self.focusedView.acceptsInput) {
self.focusedView.onKeyPress(ch, key);
}
};
this.viewActionListener = function(action) {
switch(action) {
case 'next' :
self.emit('action', { view : this, action : action });
self.nextFocus();
break;
case 'accept' : // :TODO: consider naming this 'done'
// :TODO: check if id is submit, etc.
if(self.focusedView && self.focusedView.submit) {
self.submitForm();
} else {
self.nextFocus();
}
break;
}
};
this.submitForm = function() {
self.emit('submit', this.getFormData());
};
this.getLogFriendlyFormData = function(formData) {
// :TODO: these fields should be part of menu.json sensitiveMembers[]
var safeFormData = _.cloneDeep(formData);
if(safeFormData.value.password) {
safeFormData.value.password = '*****';
}
if(safeFormData.value.passwordConfirm) {
safeFormData.value.passwordConfirm = '*****';
}
return safeFormData;
};
this.switchFocusEvent = function(event, view) {
if(self.emitSwitchFocus) {
return;
}
self.emitSwitchFocus = true;
self.emit(event, view);
self.emitSwitchFocus = false;
};
this.createViewsFromMCI = function(mciMap, cb) {
async.each(Object.keys(mciMap), function entry(name, nextItem) {
var mci = mciMap[name];
var view = self.mciViewFactory.createFromMCI(mci);
if(view) {
view.on('action', self.viewActionListener);
self.addView(view);
}
nextItem(null);
},
function complete(err) {
self.setViewOrder();
cb(err);
});
};
// :TODO: move this elsewhere
this.setViewPropertiesFromMCIConf = function(view, conf) {
for(var propName in conf) {
var propValue;
var propAsset = asset.getViewPropertyAsset(conf[propName]);
if(propAsset) {
switch(propAsset.type) {
case 'config' :
propValue = asset.resolveConfigAsset(config[propName]);
break;
// :TODO: handle @art (e.g. text : @art ...)
default :
propValue = propValue = conf[propName];
break;
}
} else {
propValue = conf[propName];
}
if(!_.isUndefined(propValue)) {
view.setPropertyValue(propName, propValue);
}
}
};
this.applyViewConfig = function(config, cb) {
var highestId = 1;
var submitId;
var initialFocusId = 1;
async.each(Object.keys(config.mci), function entry(mci, nextItem) {
var mciMatch = mci.match(MCI_REGEXP); // :TODO: How to handle auto-generated IDs????
var viewId = parseInt(mciMatch[2]);
assert(!isNaN(viewId));
var view = self.getView(viewId);
if(!view) {
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self.client.log.warn( { viewId : viewId }, 'Cannot find view');
nextItem(null);
return;
}
var mciConf = config.mci[mci];
self.setViewPropertiesFromMCIConf(view, mciConf);
if(mciConf.focus) {
initialFocusId = viewId;
}
if(view.submit) {
submitId = viewId;
if(_.isArray(mciConf.submit)) {
for(var i = 0; i < mciConf.submit.length; i++) {
self.submitKeyMap[mciConf.submit[i]] = viewId;
}
}
}
nextItem(null);
},
function complete(err) {
// default to highest ID if no 'submit' entry present
if(!submitId) {
self.getView(highestId).submit = true;
}
cb(err, { initialFocusId : initialFocusId } );
});
};
if(!options.detached) {
this.attachClientEvents();
}
}
util.inherits(ViewController, events.EventEmitter);
ViewController.prototype.attachClientEvents = function() {
if(this.attached) {
return;
}
this.client.on('key press', this.clientKeyPressHandler);
this.attached = true;
};
ViewController.prototype.detachClientEvents = function() {
if(!this.attached) {
return;
}
this.client.removeListener('key press', this.clientKeyPressHandler);
for(var id in this.views) {
this.views[id].removeAllListeners();
}
this.attached = false;
};
ViewController.prototype.viewExists = function(id) {
return id in this.views;
};
ViewController.prototype.addView = function(view) {
assert(!this.viewExists(view.id), 'View with ID ' + view.id + ' already exists');
this.views[view.id] = view;
};
ViewController.prototype.getView = function(id) {
return this.views[id];
};
ViewController.prototype.getFocusedView = function() {
return this.focusedView;
};
ViewController.prototype.setFocus = function(focused) {
if(focused) {
this.attachClientEvents();
} else {
this.detachClientEvents();
}
};
ViewController.prototype.switchFocus = function(id) {
this.setFocus(true); // ensure events are attached
if(this.focusedView && this.focusedView.acceptsFocus) {
this.switchFocusEvent('leave', this.focusedView);
this.focusedView.setFocus(false);
}
var view = this.getView(id);
if(view && view.acceptsFocus) {
this.switchFocusEvent('return', view);
this.focusedView = view;
this.focusedView.setFocus(true);
}
};
ViewController.prototype.nextFocus = function() {
if(!this.focusedView) {
this.switchFocus(this.views[this.firstId].id);
} else {
var nextId = this.views[this.focusedView.id].nextId;
this.switchFocus(nextId);
}
};
ViewController.prototype.setViewOrder = function(order) {
var viewIdOrder = order || [];
if(0 === viewIdOrder.length) {
for(var id in this.views) {
if(this.views[id].acceptsFocus) {
viewIdOrder.push(id);
}
}
viewIdOrder.sort(function intSort(a, b) {
return a - b;
});
}
if(viewIdOrder.length > 0) {
var view;
var count = viewIdOrder.length - 1;
for(var i = 0; i < count; ++i) {
this.views[viewIdOrder[i]].nextId = viewIdOrder[i + 1];
}
this.firstId = viewIdOrder[0];
var lastId = viewIdOrder.length > 1 ? viewIdOrder[viewIdOrder.length - 1] : this.firstId;
this.views[lastId].nextId = this.firstId;
}
};
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ViewController.prototype.redrawAll = function(initialFocusId) {
this.client.term.rawWrite(ansi.hideCursor());
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for(var id in this.views) {
if(initialFocusId === id) {
continue; // will draw @ focus
}
this.views[id].redraw();
}
this.client.term.rawWrite(ansi.showCursor());
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};
ViewController.prototype.loadFromPromptConfig = function(options, cb) {
assert(_.isObject(options));
assert(_.isObject(options.mciMap));
var self = this;
var promptConfig = self.client.currentMenuModule.menuConfig.promptConfig;
var initialFocusId = 1; // default to first
async.waterfall(
[
function createViewsFromMCI(callback) {
self.createViewsFromMCI(options.mciMap, function viewsCreated(err) {
callback(err);
});
},
function applyThemeCustomization(callback) {
if(_.isObject(promptConfig)) {
menuUtil.applyThemeCustomization({
name : self.client.currentMenuModule.menuConfig.prompt,
type : "prompts",
client : self.client,
configMci : promptConfig.mci,
});
}
callback(null);
},
function applyViewConfiguration(callback) {
if(_.isObject(promptConfig.mci)) {
self.applyViewConfig(promptConfig, function configApplied(err, info) {
initialFocusId = info.initialFocusId;
callback(err);
});
} else {
callback(null);
}
},
function prepareFormSubmission(callback) {
self.on('submit', function promptSubmit(formData) {
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self.client.log.trace( { formData : self.getLogFriendlyFormData(formData) }, 'Prompt submit');
menuUtil.handleAction(self.client, formData, self.client.currentMenuModule.menuConfig);
});
callback(null);
},
function drawAllViews(callback) {
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self.redrawAll(initialFocusId);
callback(null);
},
function setInitialViewFocus(callback) {
if(initialFocusId) {
self.switchFocus(initialFocusId);
}
callback(null);
}
],
function complete(err) {
cb(err);
}
);
};
ViewController.prototype.loadFromMenuConfig = function(options, cb) {
assert(_.isObject(options));
assert(_.isObject(options.mciMap));
var self = this;
var formIdKey = options.formId ? options.formId.toString() : '0';
var initialFocusId = 1; // default to first
var formConfig;
// :TODO: honor options.withoutForm
// method for comparing submitted form data to configuration entries
var actionBlockValueComparator = function(formValue, actionValue) {
//
// For a match to occur, one of the following must be true:
//
// * actionValue is a Object:
// a) All key/values must exactly match
// b) value is null; The key (view ID) must be present
// in formValue. This is a wildcard/any match.
// * actionValue is a Number: This represents a view ID that
// must be present in formValue.
//
if(_.isNumber(actionValue)) {
if(_.isUndefined(formValue[actionValue])) {
return false;
}
} else {
var actionValueKeys = Object.keys(actionValue);
for(var i = 0; i < actionValueKeys.length; ++i) {
var viewId = actionValueKeys[i];
if(!_.has(formValue, viewId)) {
return false;
}
if(null !== actionValue[viewId] && actionValue[viewId] !== formValue[viewId]) {
return false;
}
}
}
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self.client.log.trace( { formValue : formValue, actionValue : actionValue }, 'Action match');
return true;
};
async.waterfall(
[
function findMatchingFormConfig(callback) {
menuUtil.getFormConfigByIDAndMap(self.client.currentMenuModule.menuConfig, formIdKey, options.mciMap, function matchingConfig(err, fc) {
formConfig = fc;
if(err) {
// non-fatal
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self.client.log.trace(
{ error : err, mci : Object.keys(options.mciMap), formId : formIdKey },
'Unable to find matching form configuration');
}
callback(null);
});
},
function createViews(callback) {
self.createViewsFromMCI(options.mciMap, function viewsCreated(err) {
callback(err);
});
},
function applyThemeCustomization(callback) {
if(_.isObject(formConfig)) {
menuUtil.applyThemeCustomization({
name : self.client.currentMenuModule.menuName,
type : "menus",
client : self.client,
configMci : formConfig.mci,
});
}
callback(null);
},
function applyViewConfiguration(callback) {
if(_.isObject(formConfig)) {
self.applyViewConfig(formConfig, function configApplied(err, info) {
initialFocusId = info.initialFocusId;
callback(err);
});
} else {
callback(null);
}
},
function prepareFormSubmission(callback) {
if(!_.isObject(formConfig) || !_.isObject(formConfig.submit)) {
callback(null);
return;
}
self.on('submit', function formSubmit(formData) {
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self.client.log.trace( { formData : self.getLogFriendlyFormData(formData) }, 'Form submit');
//
// Locate configuration for this form ID
//
var confForFormId;
if(_.isObject(formConfig.submit[formData.submitId])) {
confForFormId = formConfig.submit[formData.submitId];
} else if(_.isObject(formConfig.submit['*'])) {
confForFormId = formConfig.submit['*'];
} else {
// no configuration for this submitId
self.client.log.debug( { formId : formData.submitId }, 'No configuration for form ID');
return;
}
//
// Locate a matching action block based on the submitted data
//
for(var c = 0; c < confForFormId.length; ++c) {
var actionBlock = confForFormId[c];
if(_.isEqual(formData.value, actionBlock.value, actionBlockValueComparator)) {
menuUtil.handleAction(self.client, formData, actionBlock);
break; // there an only be one...
}
}
});
callback(null);
},
function drawAllViews(callback) {
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self.redrawAll(initialFocusId);
callback(null);
},
function setInitialViewFocus(callback) {
if(initialFocusId) {
self.switchFocus(initialFocusId);
}
callback(null);
}
],
function complete(err) {
if(_.isFunction(cb)) {
cb(err);
}
}
);
};
ViewController.prototype.formatMCIString = function(format) {
var self = this;
var view;
return format.replace(/{(\d+)}/g, function replacer(match, number) {
view = self.getView(number);
if(!view) {
return match;
}
return view.getData();
});
};
ViewController.prototype.getFormData = function() {
/*
Example form data:
{
id : 0,
submitId : 1,
value : {
"1" : "hurp",
"2" : [ 'a', 'b', ... ],
"3" 2,
"pants" : "no way"
}
}
*/
var formData = {
id : this.formId,
submitId : this.focusedView.id,
value : {},
};
var viewData;
var view;
for(var id in this.views) {
try {
view = this.views[id];
viewData = view.getData();
if(!_.isUndefined(viewData)) {
if(_.isString(view.submitArgName)) {
formData.value[view.submitArgName] = viewData;
} else {
formData.value[id] = viewData;
}
}
} catch(e) {
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self.client.log.error(e); // :TODO: Log better ;)
}
}
return formData;
}
/*
ViewController.prototype.formatMenuArgs = function(args) {
var self = this;
return _.mapValues(args, function val(value) {
if('string' === typeof value) {
return self.formatMCIString(value);
}
return value;
});
};
*/