funky-firebase

Simple functional wrapper for Firebase.

Why? Because point-free composition > pointless method chaining :-)

All functions curried to taste (using the excellent ramda library)

Uses promises for async operations

Poorly documented and far from complete :-)

Core functions

Operations (asynchronous)

get(ref)

Resolves with value

update(ref, data)

set(ref, data)

push(ref, data)

transaction(ref, fn)

Examples

# Get and print value at ref
get(ref).then(console.log);

# Set value at ref
set(ref, {key: 'value'});

# Partially apply 'set' function
updateScore = set(scoreRef);

# Use partially applied 'set' function
updateScore(10)

References (synchronous)

child(ref, path)

Returns ref

url(ref)

Returns url string

Examples

# Get ref to grandchild of base reference
grandchild = child(baseRef, '/child/grandchild');

# Get absolute url and print to console
console.log(url(grandchild)); # e.g. 'https://test.firebaseio.com/child/grandchild'

Events (asynchronous/callback)

Functions take callback as second argument

onValue(ref, callback(value))

onChildAdded(ref, callback(value, [prevChildKey]))

onChildChanged(ref, callback(value, [prevChildKey]))

onChildMoved(ref, callback(value, [prevChildKey]))

onChildRemoved(ref, callback(value, [prevChildKey]))

# Print value at ref on change
onValue(ref, function(value) {
  console.log(value)
  });

Queries (synchronous)

To be documented

orderByKey(ref, key)

orderByValue(ref, value)

orderByChild(ref, path, value)

startAt(value, ref)

endAt(value, ref)

equalTo(value, ref)

limitToFirst(num, ref)

limitToLast(num, ref)

First order compositions

Mathematical operations (asynchronous)

Functions return promises that resolve when operation complete

add(ref, term)

subtract(ref, term)

multiply(ref, factor)

divide(ref, divisor)

Examples

add(ref, 10)        # add 10 to value at ref
divide(ref, 10)     # divide value at ref by 10

Queries (asynchronous)

Functions return promises that resolve with corresponding values

getByKey(ref, key)

getByValue(ref, value)

getByChild(ref, path, value)

Examples

### Get user by email address ###

# Get ref
users = child(ref, 'users');

# Set value at ref
set(users, [
  {name: 'Thor', email: '[e-mail]'},
  {name: 'Odin', email: '[e-mail]'}
}]);

# Partially apply 'getByChild' function
getUserByEmail = getByChild(users, 'email');

# Use partially applied 'getByChild' function
getUserByEmail('[e-mail]')
.then(console.log)

# Result (approx.)
> {name: 'Odin', email: '[e-mail]'}

Second order compositions

Mathematical operations

increment(ref)

Equivalent to add(ref, 1)

Resolves when operation complete

decrement(ref)

Equivalent to subtract(ref, 1)

Resolves when operation complete

Examples

increment(ref)        # increment value at ref by 1