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Implementing logical methods #8

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Implementing logical methods #8

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620c1af
Implement an eval method
sabihoshi Feb 22, 2020
c897261
Fix issues with commit
sabihoshi Feb 22, 2020
28f60c0
Rename eval to bool
sabihoshi Feb 27, 2020
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60 changes: 42 additions & 18 deletions src/main/java/com/jagrosh/jagtag/libraries/Functional.java
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Original file line number Diff line number Diff line change
Expand Up @@ -23,19 +23,19 @@
/**
* Functional Library
* Methods for conditionals and mathematics
*
*
* @author John Grosh (jagrosh)
*/
public class Functional {

public static Collection<Method> getMethods() {
return Arrays.asList(
// equivalent to a comment; gets removed at runtime
new Method("note", (env,in) -> ""),

// chooses randomly between options
new Method("choose", (env,in) -> {return in.length==0 ? "" : in[(int)(Math.random()*in.length)];}, true),

// picks a random number in the provided range
new Method("range", (env,in) -> {
try{
Expand All @@ -52,7 +52,7 @@ public static Collection<Method> getMethods() {
return in[0]+"|"+in[1];
}
}, "|"),

// performs a conditional
new Method("if", (env,in) -> {
if(in[0].equalsIgnoreCase("true"))
Expand All @@ -63,12 +63,36 @@ public static Collection<Method> getMethods() {
return in[1];
return in[2];
}, "|then:", "|else:"),


// performs a conditional and outputs true/false
new Method("bool", (env, in) -> {
if(in[0].equalsIgnoreCase("true"))
return "true";
if(in[0].equalsIgnoreCase("false"))
return "false";
return Boolean.toString(evaluateStatement(in[0]));
}),

// performs a switch conditional
new Method("switch", (env,in) -> {
String[] cases = in[1].split("\\|");

if(cases.length % 2 != 0)
return in[in.length - 1];

for (int i = 0; i < cases.length; i += 2) {
if(in[0].equals(cases[i]))
return cases[i + 1];
}

return in[in.length - 1];
}, "|cases:", "|default:"),

// performs basic mathematical function
new Method("math", (env,in) -> {
return evaluateMath(in[0]);
}),

// returns the absolute value of the provided number
new Method("abs", (env,in) -> {
try {
Expand All @@ -79,7 +103,7 @@ public static Collection<Method> getMethods() {
} catch(NumberFormatException e){}
return in[0];
}),

// rounds a number down
new Method("floor", (env,in) -> {
try {
Expand All @@ -88,7 +112,7 @@ public static Collection<Method> getMethods() {
return in[0];
}
}),

// rounds a number up
new Method("ceil", (env,in) -> {
try {
Expand All @@ -97,7 +121,7 @@ public static Collection<Method> getMethods() {
return in[0];
}
}),

// rounds a number up if the decimal part is .5 or greater, down otherwise
new Method("round", (env,in) -> {
try {
Expand All @@ -106,7 +130,7 @@ public static Collection<Method> getMethods() {
return in[0];
}
}),

// takes the sine of radians
new Method("sin", (env,in) -> {
try {
Expand All @@ -115,7 +139,7 @@ public static Collection<Method> getMethods() {
return in[0];
}
}),

// takes the cosine of radians
new Method("cos", (env,in) -> {
try {
Expand All @@ -124,7 +148,7 @@ public static Collection<Method> getMethods() {
return in[0];
}
}),

// takes the tangent of radians
new Method("tan", (env,in) -> {
try {
Expand All @@ -133,7 +157,7 @@ public static Collection<Method> getMethods() {
return in[0];
}
}),

// converts a number to a different base
new Method("base", (env, in) -> {
try {
Expand All @@ -144,7 +168,7 @@ public static Collection<Method> getMethods() {
},true)
);
}

private static String evaluateMath(String statement)
{
int index = statement.lastIndexOf("|+|");
Expand Down Expand Up @@ -201,7 +225,7 @@ private static String evaluateMath(String statement)
}
return statement;
}

private static boolean evaluateStatement(String statement)
{
int index = statement.indexOf("|=|");
Expand All @@ -217,7 +241,7 @@ private static boolean evaluateStatement(String statement)
return false;
String s1 = statement.substring(0, index).trim();
String s2 = statement.substring(index+3).trim();

try{
double i1 = Double.parseDouble(s1);
double i2 = Double.parseDouble(s2);
Expand All @@ -233,7 +257,7 @@ private static boolean evaluateStatement(String statement)
return (i1<i2);
}
}catch(NumberFormatException e){}

switch(statement.substring(index, index+3))
{
case "|=|":
Expand Down