firebase-rules-parser
Version:
Parser for Firebase rule files
120 lines • 7.52 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
/**
* Returns a lowercase version of the input string.
*/
const lower = (context, closure, self) => {
if (typeof self !== 'string') {
throw new Error(`Can not call lower() -method on non string object: ${self}`);
}
return self.toLowerCase();
};
/**
* Returns the number of characters in the string.
*/
const size = (context, closure, self) => {
const type = typeof self;
if (Array.isArray(self) || type === 'string') {
return self.length;
}
if (type === 'object') {
return Object.keys(self).length;
}
throw new Error(`Can not call length() -method on non string object: ${self}`);
};
/**
* Boolean, integer, float, and null values can be converted into strings using the string() function:
*/
const string = (context, closure, self) => {
const stringWannabe = closure.getValue('value');
if (stringWannabe === undefined) {
throw new Error(`string() -method did not have an argument.`);
}
if (stringWannabe === null) {
return 'null';
}
switch (typeof stringWannabe) {
case 'string':
case 'boolean':
case 'number':
return JSON.stringify(stringWannabe);
default:
throw new Error(`Can not conver type of: ${typeof stringWannabe} to string.`);
}
};
/**
* Splits a string according to a regular expression.
*/
const split = (context, closure, self) => {
if (typeof self !== 'string') {
throw new Error(`Can not call split() -method on non string object: ${self}`);
}
const re = closure.getValue('re');
if (!re) {
throw new Error(`split() -method did not have an argument.`);
}
return self.split(re);
};
/**
* Performs a regular expression match on the whole string.
*/
const matches = (context, closure, self) => {
if (typeof self !== 'string') {
throw new Error(`Can not call matches() -method on non string object: ${self}`);
}
const re = closure.getValue('re');
if (!re) {
throw new Error(`matches() -method did not have an argument.`);
}
return self.match(re) !== null; // TODO user actual Google RE2 syntax
};
/**
* Returns a version of the string with leading and trailing spaces removed.
*/
const trim = (context, closure, self) => {
if (typeof self !== 'string') {
throw new Error(`Can not call trim() -method on non string object: ${self}`);
}
return self.trim();
};
const upper = (context, closure, self) => {
if (typeof self !== 'string') {
throw new Error(`Can not call upper() -method on non string object: ${self}`);
}
return self.toUpperCase();
};
function registerStringFunctions(closure) {
const stringFunctions = {
lower: {
callback: lower,
argNames: [],
},
matches: {
callback: matches,
argNames: ['re'],
},
size: {
callback: size,
argNames: [],
},
split: {
callback: split,
argNames: ['re'],
},
string: {
callback: string,
argNames: ['value'],
},
trim: {
callback: trim,
argNames: [],
},
upper: {
callback: upper,
argNames: [],
},
};
closure.self = Object.assign({}, closure.self, stringFunctions);
}
exports.default = registerStringFunctions;
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