npm install gql

| Package | gql |
| Description | Query language for interpreting genome SNPs |
| Node Version | >= 0.4 |
This query language is for use with the genomejs JSON format. See the dna2json repository for more information.
Just a reminder: deletions are represented as -!
This example will create a query that determines if a person is sickle cell effected.
``javascript
var gql = require('gql');
var dna = require('./genome.json');
var query = gql.or([
gql.exact('rs334', 'TT'),
gql.exact('i3003137', 'AA')
]);
var isMatch = query(dna);
console.log(isMatch); // true or false
`
All of these APIs return a boolean-returning function that acts as the truth test. These functions take in one argument, a DNA-JSON object. You can nest as deep as you want, or be as basic as you want.
For example, checking if a person is immune to norovirus is pretty simple:
`js
var dna = require('./my-dna.json');
var query = gql.exact('rs601338', 'AA');
var isImmune = query(dna);
`
#### exact(id, genotype)
Evaluates to true if this was the only allele observed.
`javascript`
q.exact('rs2032651', 'D'); // will only match genotype D
q.exact('rs2032651', 'AT'); // will only match genotype AT
#### has(id, genotype)
Evaluates to true if the allele was observed at all.
`javascript`
q.has('rs2032651', 'A'); // will match GA, GAT, AB, etc.
#### exists(id)
Evaluates to true if any allele has been observed.
`javascript`
q.exists('rs2032651');
#### doesntExist(id)
Evaluates to true if no allele has been observed.
`javascript`
q.doesntExist('rs2032651');
#### not(condition)
Inverts the result of another condition.
`javascript
// evaluates to true if rs2032651 != AA
var query = q.not(q.exact('rs2032651', 'AA'));
query({
rs2032651: {
genotype: 'TT'
}
}); // true
query({
rs2032651: {
genotype: 'AA'
}
}); // false
`
#### only(id, allele)
Evaluates to true if only the allele was observed at the specified position.
`javascript`
q.only('rs2032651', 'A'); // will match A, AA, AAA, etc.
#### or(conditions...)
Evaluates to true if any of the given condition functions evaluate to true.
`javascript`
q.or([
q.has('rs2032651', 'A'),
q.doesntExist('rs2032651')
]);
#### and(conditions...)
Evaluates to true if all of the given condition functions evaluate to true.
`javascript`
q.and([
q.exists('rs2032652'),
q.has('rs2032651', 'A')
]);
#### atLeast(number, conditions...)
Evaluates to true if the number of given condition functions evaluating to true is equal to or greater than the given number.
`javascript`
q.atLeast(2, [
q.exists('rs2032652'),
q.has('rs2032651', 'A'),
q.exact('rs2032653', 'AT'),
q.exact('rs2032654', 'GG')
]);
#### none(conditions...)
Evaluates to true if all of the given condition functions evaluate to false.
`javascript``
q.none([
q.has('rs2032651', 'A'),
q.doesntExist('rs2032651')
]);
(MIT License)
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