Working auth and photo json endpoint

Signed-off-by: Kris Nóva <kris@nivenly.com>

vendor/github.com/melihmucuk/geocache/cache.go

@@ -0,0 +1,165 @@
+package geocache
+
+import (
+	"errors"
+	"sync"
+	"time"
+
+	"github.com/shopspring/decimal"
+)
+
+// Range specifies range of cache
+type Range int32
+
+const (
+	// WithIn11KM The first decimal place is worth up to 11.1 km
+	// eg: 41.3, 29.6
+	WithIn11KM Range = 1 + iota
+
+	// WithIn1KM The second decimal place is worth up to 1.1 km
+	// eg: 41.36, 29.63
+	WithIn1KM
+
+	// WithIn110M The third decimal place is worth up to 110 m
+	// eg: 41.367, 29.631
+	WithIn110M
+
+	// WithIn11M The fourth decimal place is worth up to 11 m
+	// eg: 41.3674, 29.6316
+	WithIn11M
+
+	// WithIn1M The fifth decimal place is worth up to 1.1 m
+	// eg: 41.36742, 29.63168
+	WithIn1M
+
+	// WithIn11CM The sixth decimal place is worth up to 0.11 m
+	// eg: 41.367421, 29.631689
+	WithIn11CM
+
+	// WithIn11MM The seventh decimal place is worth up to 11 mm
+	// eg: 41.3674211, 29.6316893
+	WithIn11MM
+
+	// WithIn1MM The eighth decimal place is worth up to 1.1 mm
+	// eg: 41.36742115, 29.63168932
+	WithIn1MM
+)
+
+// Item struct keeps cache value and expiration time of object
+type Item struct {
+	Object     interface{}
+	Expiration int64
+}
+
+// Cache struct manages items, expirations and clean ups
+type Cache struct {
+	items           map[GeoPoint]Item
+	m               sync.RWMutex
+	expiration      time.Duration
+	cleanUpInterval time.Duration
+	precision       int32
+	stopCleanUp     chan bool
+}
+
+// GeoPoint specifies point that used as key of cache
+type GeoPoint struct {
+	Latitude  float64
+	Longitude float64
+}
+
+// NewCache creates new Cache with params and returns pointer of Cache and error
+// cleanUpInterval used for deleting expired objects from cache.
+func NewCache(expiration, cleanUpInterval time.Duration, withInRange Range) (*Cache, error) {
+	if withInRange < 1 || withInRange > 8 {
+		return nil, errors.New("Range must be within 1-8!")
+	}
+
+	c := &Cache{items: make(map[GeoPoint]Item), expiration: expiration, cleanUpInterval: cleanUpInterval, precision: int32(withInRange), stopCleanUp: make(chan bool)}
+
+	ticker := time.NewTicker(cleanUpInterval)
+	go func() {
+		for {
+			select {
+			case <-ticker.C:
+				c.cleanUp()
+			case <-c.stopCleanUp:
+				ticker.Stop()
+				return
+			}
+		}
+	}()
+
+	return c, nil
+}
+
+// Set adds object to cache with given geopoint
+func (c *Cache) Set(position GeoPoint, value interface{}, expiration time.Duration) {
+	var exp int64
+	if expiration == 0 {
+		expiration = c.expiration
+	}
+
+	if expiration > 0 {
+		exp = time.Now().Add(expiration).UnixNano()
+	}
+	c.m.Lock()
+	defer c.m.Unlock()
+	c.items[position.truncate(c.precision)] = Item{Object: value, Expiration: exp}
+}
+
+// Get gets object from cache with given geopoint
+func (c *Cache) Get(position GeoPoint) (interface{}, bool) {
+	c.m.RLock()
+	defer c.m.RUnlock()
+	item, found := c.items[position.truncate(c.precision)]
+	return item.Object, found
+}
+
+// Items returns cached items
+func (c *Cache) Items() map[GeoPoint]Item {
+	c.m.RLock()
+	defer c.m.RUnlock()
+	return c.items
+}
+
+// ItemCount returns cached items count
+func (c *Cache) ItemCount() int {
+	c.m.RLock()
+	defer c.m.RUnlock()
+	n := len(c.items)
+	return n
+}
+
+// Flush deletes all cached items
+func (c *Cache) Flush() {
+	c.m.Lock()
+	defer c.m.Unlock()
+	c.items = map[GeoPoint]Item{}
+}
+
+// StopCleanUp stops clean up process.
+func (c *Cache) StopCleanUp() {
+	c.stopCleanUp <- true
+}
+
+func (c *Cache) cleanUp() {
+	c.m.Lock()
+	defer c.m.Unlock()
+	for k, v := range c.items {
+		if v.Expiration < time.Now().UnixNano() {
+			delete(c.items, k)
+		}
+	}
+}
+
+func (g GeoPoint) truncate(precision int32) GeoPoint {
+	dLat := decimal.NewFromFloat(g.Latitude)
+	dLong := decimal.NewFromFloat(g.Longitude)
+	lat, _ := dLat.Truncate(precision).Float64()
+	long, _ := dLong.Truncate(precision).Float64()
+
+	return GeoPoint{
+		Latitude:  lat,
+		Longitude: long,
+	}
+}