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simulator.js
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simulator.js
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(function() {
var Builtins, CastValue, DefaultVariableValue, Expression, Literalize, Simulator, VariableValue, _ref,
__indexOf = Array.prototype.indexOf || function(item) { for (var i = 0, l = this.length; i < l; i++) { if (i in this && this[i] === item) return i; } return -1; };
Builtins = require('builtins').Builtins;
_ref = require('simulator/common'), DefaultVariableValue = _ref.DefaultVariableValue, CastValue = _ref.CastValue, VariableValue = _ref.VariableValue, Literalize = _ref.Literalize;
Expression = require('simulator/expression').Expression;
Literalize = require('simulator/common').Literalize;
require('simulator/all_expressions');
exports.Simulator = Simulator = (function() {
var CARDS, KEYS, KEY_ALIASES;
KEYS = "0 1 2 3 4 5 6 7 8 9 f1 f2 f3 f4 f5 f6 f7 f8 f9 up down menu stop enter cancel".split(/\s/);
KEY_ALIASES = {
f: 'menu'
};
CARDS = {};
Simulator.register_card = function(name, values) {
return CARDS[name.toLowerCase()] = values;
};
function Simulator(dom) {
this.dom = dom;
if (typeof this.dom === 'string') {
this.dom = require('dom').build_dom_from(this.dom);
}
if (this.dom.name !== 'tml') throw new Error("TML builder required");
this.recursion_depth = 0;
this.max_recursion_depth = 10000;
this.state = {
key: "",
flow: [],
screen: {
id: null
},
variables: {}
};
this.init_variables();
if (!(this.start_screen = this.dom.first("screen"))) {
throw new Error("No screens found!");
}
}
Simulator.prototype.init_variables = function() {
var variable, _i, _len, _ref2, _results;
_ref2 = this.dom.all("vardcl");
_results = [];
for (_i = 0, _len = _ref2.length; _i < _len; _i++) {
variable = _ref2[_i];
_results.push(this.state.variables[variable.attrs.name] = {
type: variable.attrs.type || "string",
value: DefaultVariableValue(variable)
});
}
return _results;
};
Simulator.prototype.goto = function(id) {
var display, match, print, screen, _base;
if (match = /^tmlvar:(.*)$/.exec(id)) {
id = id.replace(match[0], this.state.variables[match[1]].value);
}
if (id[0] === '#') id = id.slice(1);
screen = this.dom.first("screen", {
id: id
});
if (!screen) throw new Error("Screen '" + id + "' not found!");
this.state.flow.push(screen.attrs.id);
this.state.screen.id = screen.attrs.id;
this.state.screen.element = screen;
this.process_variable_assignments();
this.state.key = "";
this.state.card = null;
this.state.display = "";
(_base = this.state).print || (_base.print = "");
if (display = this.state.screen.element.first('display')) {
this.state.display = this.process_output_element(display);
}
if (print = this.state.screen.element.first('print')) {
return this.state.print += this.process_output_element(print);
}
};
Simulator.prototype.process_output_element = function(e) {
var attr, attrs, key, match, result, str, sub, value, variable, _i, _len, _ref2, _ref3;
str = "" + ((function() {
var _i, _len, _ref2, _results;
_ref2 = e.all();
_results = [];
for (_i = 0, _len = _ref2.length; _i < _len; _i++) {
sub = _ref2[_i];
_results.push(sub.toString(false));
}
return _results;
})());
while (match = /<getvar(.*?)\/?\s*>/.exec(str)) {
attrs = {};
_ref2 = match[1].trim().split(' ');
for (_i = 0, _len = _ref2.length; _i < _len; _i++) {
attr = _ref2[_i];
_ref3 = attr.split('='), key = _ref3[0], value = _ref3[1];
attrs[key] = value.slice(1, -1);
}
variable = this.state.variables[attrs['name']];
result = variable.value;
str = str.replace(match[0], result);
}
return str;
};
Simulator.prototype.is_waiting_for_input = function() {
var card, next, scr, tform, variant, waiting_for_keypad, _i, _len, _ref2;
if (!(this.state.screen && this.state.screen.element)) return false;
scr = this.state.screen.element;
if (scr.first('display') && !this.state.key) return true;
next = this.state.screen.element.first('next');
waiting_for_keypad = false;
if (next) {
_ref2 = next.all("variant");
for (_i = 0, _len = _ref2.length; _i < _len; _i++) {
variant = _ref2[_i];
if (!this.state.key && variant.attrs['key']) waiting_for_keypad = true;
}
}
if (tform = this.state.screen.element.first('tform')) {
if (card = tform.first('card')) {
if (card.attrs['parser'] === 'mag' && card.attrs['parser_params'] === 'read_data') {
return !this.state.card;
}
}
}
if (scr.first('submit')) return true;
return waiting_for_keypad;
};
Simulator.prototype.evaluate = function(variable, type, attrs) {
variable.value = Expression.evaluate(type, attrs, this.state.variables);
if (variable.type === 'integer') variable.value = parseInt(variable.value);
return variable;
};
Simulator.prototype.find_variable = function(varname) {
var variable, _base;
variable = (_base = this.state.variables)[varname] || (_base[varname] = Builtins.descriptor_for(varname));
if (!variable) throw new Error("Variable not defined: " + assign.attrs.name);
return variable;
};
Simulator.prototype.process_variable_assignments = function() {
var assign, match, submit, type, variable, varname, _i, _len, _ref2;
_ref2 = this.state.screen.element.all('setvar');
for (_i = 0, _len = _ref2.length; _i < _len; _i++) {
assign = _ref2[_i];
varname = assign.attrs.name;
variable = this.find_variable(varname);
type = variable.type;
if (assign.attrs.lo && (match = /^tmlvar:(.*)$/.exec(assign.attrs.lo.toString()))) {
if (this.state.variables[match[1]]) {
type = this.state.variables[match[1]].type;
}
}
this.evaluate(variable, type, assign.attrs);
}
if (submit = this.state.screen.element.first('submit')) {
return this.process_form_submission(submit);
}
};
Simulator.prototype.process_form_submission = function(submit_element) {
var getvar, getvars, variable_name, _i, _len, _results;
getvars = submit_element.all('getvar');
this.state.post = {
path: submit_element.attrs.tgt
};
_results = [];
for (_i = 0, _len = getvars.length; _i < _len; _i++) {
getvar = getvars[_i];
variable_name = getvar.attrs.name;
_results.push(this.state.post[variable_name] = this.state.variables[variable_name].value);
}
return _results;
};
Simulator.prototype.step = function() {
if (!this.state.screen.element) {
return this.goto(this.start_screen.attrs.id);
} else {
if (++this.recursion_depth > this.max_recursion_depth) {
throw new Error("Recursion error!");
}
return this.process_variants();
}
};
Simulator.prototype.find_possible_variants = function() {
var candidate, candidates, next, result, variant, _i, _len, _ref2;
candidates = [];
next = this.state.screen.element.first('next');
if (next) {
_ref2 = next.all("variant");
for (_i = 0, _len = _ref2.length; _i < _len; _i++) {
variant = _ref2[_i];
if (variant.attrs['key']) {
if (this.state.key) {
if (this.state.key === variant.attrs['key']) {
return [variant.attrs['uri']];
}
} else if (!this.state.card) {
throw new Error("waiting for input");
}
} else {
result = Expression.evaluate("boolean", variant.attrs, this.state.variables);
if (result) candidates.push(variant.attrs['uri']);
}
}
}
next = (next && next.attrs['uri']) || this.state.screen.element.attrs['next'];
if (next) candidates.push(next);
candidates = (function() {
var _j, _len2, _results;
_results = [];
for (_j = 0, _len2 = candidates.length; _j < _len2; _j++) {
candidate = candidates[_j];
if (/^tmlvar:/.test(candidate)) {
_results.push(Literalize(this.state.variables, candidate, 'string'));
} else {
_results.push(candidate);
}
}
return _results;
}).call(this);
return candidates;
};
Simulator.prototype.process_variants = function() {
var candidates;
candidates = this.find_possible_variants();
if (candidates.length === 0) {} else {
return this.goto(candidates[0]);
}
};
Simulator.prototype.start = function(callback) {
return this.resume(callback);
};
Simulator.prototype.enter = function(text, press_enter, field) {
var char, found, type, variable, variant, _i, _len, _ref2;
if (press_enter == null) press_enter = true;
if (field == null) field = this.state.screen.element.search('input')[0];
char = text.charAt(0);
if (field) {
variable = this.find_variable(field.attrs.name);
type = 'string';
this.evaluate(variable, type, {
lo: "tmlvar:" + field.attrs.name,
op: "plus",
ro: char
});
} else {
found = false;
_ref2 = this.state.screen.element.search('variant');
for (_i = 0, _len = _ref2.length; _i < _len; _i++) {
variant = _ref2[_i];
if (variant.attrs['key'] === char) found = true;
}
if (!found) {
throw new Error("No handler for keypress '" + char + "' on this screen");
}
this.press(char);
}
if (text.length > 1) {
return this.enter(text.substring(1, text.length), press_enter, field);
} else {
if (press_enter) return this.press('enter');
}
};
Simulator.prototype.press = function(key) {
var _ref2;
if (KEY_ALIASES[key.toLowerCase()]) key = KEY_ALIASES[key.toLowerCase()];
if (_ref2 = key.toLowerCase(), __indexOf.call(KEYS, _ref2) < 0) {
throw new Error("Invalid key: '" + key + "'");
}
this.state.key = key.toLowerCase();
return this.start();
};
Simulator.prototype.follow = function(caption) {
var match, target;
match = new RegExp("<a([^>]+)>\\s*" + caption + "\\s*<\\/a>", "m").exec(this.state.display);
if (!match) {
throw new Error("No link visible with caption '" + caption + "'");
}
target = /href=['"]([^'"]*)['"]/.exec(match[1]);
if (!target) {
throw new Error("Anchor with caption '" + caption + "' has no href attribute");
}
this.goto(target[1]);
return this.start();
};
Simulator.prototype.fill_in = function(field, content) {
var rx;
if (!this.state.variables[field]) {
throw new Error("Variable " + field + " is not defined");
}
rx = new RegExp("<input [^>]*name=['\"]" + field + "[\"']", 'm');
if (!rx.exec(this.state.display)) {
throw new Error("Field " + field + " is not visible on this screen");
}
if (this.state.variables[field].type === 'integer') {
content = parseInt(content);
}
return this.state.variables[field].value = content;
};
Simulator.prototype.swipe_card = function(name) {
var key, parser, tform, value, _base, _name, _ref2;
this.state.card = CARDS[name.toLowerCase()] || (function() {
throw new Error("No registered card found with type " + name);
})();
if (tform = this.state.screen.element.first('tform')) {
if (parser = tform.first('card', {
parser: "mag",
parser_params: "read_data"
})) {
_ref2 = this.state.card;
for (key in _ref2) {
value = _ref2[key];
(_base = this.state.variables)[_name = "card." + key] || (_base[_name] = Builtins.descriptor_for("card." + key));
if (!this.state.variables["card." + key]) {
throw new Error("No variable named card." + key);
}
this.state.variables["card." + key].value = value;
}
return this.start();
}
}
throw new Error("No card parser found on screen " + this.state.screen.id);
};
Simulator.prototype.peek = function() {
return this.find_possible_variants()[0];
};
Simulator.prototype.resume = function(callback) {
var peeked;
this.recursion_depth = 0;
if (callback) {
this.step();
if (callback(this) && this.peek()) return this.resume(callback);
} else {
try {
if (this.is_waiting_for_input()) return;
this.step();
if (this.is_waiting_for_input()) return;
peeked = this.peek();
if (peeked && peeked !== ("#" + this.start_screen.attrs.id)) {
return this.resume(callback);
}
} catch (e) {
if (e.message === "waiting for input") return;
throw e;
}
}
};
return Simulator;
})();
Simulator.register_card("visa", {
cardholder_name: "John Smith",
effective_date: "01/01/2001",
expiry_date: "01/01/2111",
issue_number: "N/A",
issuer_name: "N/A",
pan: "4111111111111111",
scheme: "VISA"
});
}).call(this);