62 lines
1.8 KiB
JavaScript
62 lines
1.8 KiB
JavaScript
//evaluates a calculation string
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evaluate = function(charId, string){
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if(!string) return string;
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var char = Characters.findOne(charId, {fields: {_id: 1}});
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string = string.replace(/\b[a-z]+\b/gi, function(sub){
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//fields
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if(Schemas.Character.schema(sub)){
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return char.fieldValue(sub)
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}
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//ability modifiers
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var abilityMods = ["STRENGTHMOD", "DEXTERITYMOD", "CONSTITUTIONMOD", "INTELLIGENCEMOD", "WISDOMMOD", "CHARISMAMOD"]
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if( _.contains(abilityMods, sub.toUpperCase()) ){
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var slice = sub.slice(0, - 3);
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return char.abilityMod(slice);
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}
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//class levels
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if(/\w+levels?\b/gi.test(sub)){
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//strip out "level"
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var className = sub.replace(/levels?\b/gi, "");
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var cls = Classes.findOne({charId: charId, name: className});
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return cls && cls.level;
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}
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//character level
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if(sub.toUpperCase() === "LEVEL"){
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return char.level();
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}
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return sub;
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});
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try{
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var result = math.eval(string);
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return result;
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} catch(e){
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console.log("Failed to evaluate ", string);
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return string;
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}
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}
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//takes a string with {calculations} and returns it with the results
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//of the calculations returned in place
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evaluateString = function(charId, string){
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//define brackets as curly brackets around anything that isn't a curly bracket
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if(!string) return string;
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var brackets = /\{[^\{\}]*\}/g;
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var result = string.replace(brackets, function(exp){
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var exp = exp.replace(/(\{|\})/g, "") //remove curly brackets
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return evaluate(charId, exp);
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});
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return result;
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}
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//returns the value of the effect if it exists,
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//otherwise returns the result of the calculation if it exists,
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//otherwise returns 0
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evaluateEffect = function(charId, effect){
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if(_.isFinite(effect.value)){
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return effect.value;
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} else if(_.isString(effect.calculation)){
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return +evaluate(charId, effect.calculation);
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} else {
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return 0;
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}
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} |