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GraphQLValidatedNumber.js
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GraphQLValidatedNumber.js
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const {Kind} = require('graphql/language');
const GraphQLValidatedScalar = require('./GraphQLValidatedScalar');
class GraphQLValidatedNumber extends GraphQLValidatedScalar {
constructor (args = {}) {
if (!args.name) {
args.name = 'Number';
}
super(args);
this.validator(Number);
}
validKinds () {
return [Kind.INT, Kind.FLOAT];
}
validTypes () {
return ['number'];
}
shouldDefault (value) {
return super.shouldDefault(value) && value !== 0;
}
limit ({valid, description}) {
return this.validator((num)=> {
if (!valid(num)) {
throw new TypeError(`${this.name} is ${description}`);
}
return num;
});
}
min (min) {
return this.limit({
description: 'below minimum value',
valid: (num)=> {
return num >= min;
}
});
}
max (max) {
return this.limit({
description: 'above maximum value',
valid: (num)=> {
return num <= max;
}
});
}
range ([min, max]) {
return this.limit({
description: 'not within range',
valid: (num)=> {
return num >= min && num <= max;
}
});
}
below (limit) {
return this.limit({
description: 'not below limit',
valid: (num)=> {
return num < limit;
}
});
}
above (limit) {
return this.limit({
description: 'not above limit',
valid: (num)=> {
return num > limit;
}
});
}
between ([low, high]) {
return this.limit({
description: 'not between limits',
valid: (num)=> {
return num > low && num < high;
}
});
}
positive () {
return this.limit({
description: 'not positive',
valid: (num)=> {
return num > 0;
}
});
}
negative () {
return this.limit({
description: 'not negative',
valid: (num)=> {
return num < 0;
}
});
}
nonnegative () {
return this.limit({
description: 'negative',
valid: (num)=> {
return num >= 0;
}
});
}
}
module.exports = GraphQLValidatedNumber;