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collection.go
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collection.go
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package aranGO
// TODO Must Implement revision control
import (
"errors"
nap "github.com/diegogub/napping"
)
// Options to create collection
type CollectionOptions struct {
Name string `json:"name"`
Type uint `json:"type"`
Sync bool `json:"waitForSync,omitempty"`
Compact bool `json:"doCompact,omitempty"`
JournalSize int `json:"journalSize,omitempty"`
System bool `json:"isSystem,omitempty"`
Volatile bool `json:"isVolatile,omitempty"`
Keys map[string]interface{} `json:"keyOptions,omitempty"`
// Count
Count int64 `json:"count"`
// Cluster
Shards int `json:"numberOfShards,omitempty"`
ShardKeys []string `json:"shardKeys,omitempty"`
}
func NewCollectionOptions(name string, sync bool) *CollectionOptions {
var copt CollectionOptions
copt.Name = name
copt.Sync = sync
return &copt
}
func (opt *CollectionOptions) IsEdge() {
opt.Type = 3
return
}
func (opt *CollectionOptions) IsDocument() {
opt.Type = 2
return
}
// Sets always-sync to true
func (opt *CollectionOptions) MustSync() {
opt.Sync = true
return
}
// Sets if collection must be Volatile.
func (opt *CollectionOptions) IsVolatile() {
opt.Volatile = true
return
}
// Sets custom journal size
func (opt *CollectionOptions) Journal(size int) {
if size <= 0 {
size = 1
}
// convert to kb
size = size * 1024 * 1024
opt.JournalSize = size
}
// Sets the number of shards for a collection
func (opt *CollectionOptions) Shard(num int) {
if num <= 0 {
num = 1
}
opt.Shards = num
}
func (opt *CollectionOptions) ShardKey(keys []string) {
if len(keys) == 0 {
return
}
if opt.ShardKeys == nil {
opt.ShardKeys = make([]string, 0)
}
opt.ShardKeys = keys
}
// Basic Collection struct
type Collection struct {
db *Database `json:"db"`
Name string `json:"name"`
System bool `json:"isSystem"`
Status int `json:"status"`
// 3 = Edges , 2 = Documents
Type int `json:"type"`
policy string `json:"-"`
revision bool `json:"-"`
}
// Load collection
func (col *Collection) Load() error {
// set count to false to speed up loading
payload := map[string]bool{"count": false}
res, err := col.db.send("collection", col.Name+"/load", "PUT", payload, nil, nil)
if err != nil {
return err
}
switch res.Status() {
case 400, 404:
return errors.New("Invalid collection to load")
default:
return nil
}
}
//Count all documents in collection
func (col *Collection) Count() int64 {
var cop CollectionOptions
res, err := col.db.get("collection", col.Name+"/count", "GET", nil, &cop, &cop)
if err != nil {
return 0
}
switch res.Status() {
case 400, 404:
return 0
default:
return cop.Count
}
}
// Save saves doc into collection, doc should have Document Embedded to retrieve error and Key later.
func (col *Collection) Save(doc interface{}) error {
var err error
var res *nap.Response
if col.Type == 2 {
res, err = col.db.send("document?collection="+col.Name, "", "POST", doc, &doc, &doc)
} else {
return errors.New("Trying to save doc into EdgeCollection")
}
if err != nil {
return err
}
switch res.Status() {
case 201:
return nil
case 202:
return nil
case 400:
return errors.New("Invalid document json")
case 404:
return errors.New("Collection does not exist")
default:
return nil
}
}
// Save Edge into Edges collection
func (col *Collection) SaveEdge(doc interface{}, from string, to string) error {
var err error
var res *nap.Response
if col.Type == 3 {
res, err = col.db.send("edge?collection="+col.Name+"&from="+from+"&to="+to, "", "POST", doc, &doc, &doc)
} else {
return errors.New("Trying to save document into Edge-Collection")
}
if err != nil {
return err
}
if res.Status() != 201 && res.Status() != 202 {
return errors.New("Unable to save document error")
}
return nil
}
//Edges gets vertex relations
func (col *Collection) Edges(start string, direction string, result interface{}) error {
if start == "" {
return errors.New("Invalid start vertex")
}
if direction != "in" && direction != "out" {
direction = "any"
}
if col.Type == 2 {
return errors.New("Invalid edge collection: " + col.Name)
}
res, err := col.db.get("edges", col.Name+"?vertex="+start+"&direction="+direction, "GET", nil, &result, &result)
if err != nil {
return err
}
switch res.Status() {
case 200:
return nil
default:
return errors.New("failed to get edges")
}
}
// Relate documents in edge collection
func (col *Collection) Relate(from string, to string, label interface{}) error {
if col.Type == 2 {
return errors.New("Invalid collection to add Edge: " + col.Name)
}
if from == "" || to == "" {
return errors.New("from or to documents don't exist")
}
return col.SaveEdge(label, from, to)
}
//Get Document
func (col *Collection) Get(key string, doc interface{}) error {
var err error
if key == "" {
return errors.New("Key must not be empty")
}
if col.Type == 2 {
_, err = col.db.get("document", col.Name+"/"+key, "GET", nil, &doc, &doc)
} else {
_, err = col.db.get("edge", col.Name+"/"+key, "GET", nil, &doc, &doc)
}
if err != nil {
return err
}
return nil
}
// Replace document
func (col *Collection) Replace(key string, doc interface{}) error {
var err error
var res *nap.Response
if key == "" {
return errors.New("Key must not be empty")
}
if col.Type == 2 {
res, err = col.db.send("document", col.Name+"/"+key, "PUT", doc, &doc, &doc)
} else {
res, err = col.db.send("edge", col.Name+"/"+key, "PUT", doc, &doc, &doc)
}
if err != nil {
return err
}
switch res.Status() {
case 201:
return nil
case 202:
return nil
case 400:
return errors.New("Invalid json")
case 404:
return errors.New("Collection or document was not found")
default:
return nil
}
}
func (col *Collection) Patch(key string, doc interface{}) error {
var err error
var res *nap.Response
if key == "" {
return errors.New("Key must not be empty")
}
if col.Type == 2 {
res, err = col.db.send("document", col.Name+"/"+key, "PATCH", doc, &doc, &doc)
} else {
res, err = col.db.send("edge", col.Name+"/"+key+"?rev=", "PATCH", doc, &doc, &doc)
}
if err != nil {
return err
}
switch res.Status() {
case 201:
return nil
case 202:
return nil
case 400:
return errors.New("Body does not contain a valid JSON representation of a document.")
case 404:
return errors.New("Collection or document was not found")
default:
return nil
}
}
func (col *Collection) Delete(key string) error {
var err error
var res *nap.Response
if key == "" {
return errors.New("Key must not be empty")
}
if col.Type == 2 {
res, err = col.db.get("document", col.Name+"/"+key, "DELETE", nil, nil, nil)
} else {
res, err = col.db.get("edge", col.Name+"/"+key, "DELETE", nil, nil, nil)
}
if err != nil {
return err
}
switch res.Status() {
case 202, 200:
return nil
default:
return errors.New("Document don't exist or revision error")
}
}
// Collections gets list of collections from any database
func Collections(db *Database) error {
var err error
var res *nap.Response
// get all non-system collections
res, err = db.get("collection?excludeSystem=true", "", "GET", nil, db, db)
if err != nil {
return err
}
if res.Status() == 200 {
var result struct {
Result []Collection `json:"result"`
}
if err = res.Unmarshal(&result); err != nil {
return err
}
for i, _ := range result.Result {
result.Result[i].db = db
db.Collections = append(db.Collections, result.Result[i])
}
return nil
} else {
return errors.New("Failed to retrieve collections from Database")
}
}
// Unique checks if a key is unique
func (c *Collection) Unique(key string, value interface{}, update bool, index string) (bool, error) {
var cur *Cursor
var err error
switch index {
case "hash":
// must implement other simple query function s
case "skip-list":
default:
cur, err = c.Example(map[string]interface{}{key: value}, 0, 2)
}
if err != nil {
return false, err
}
var result map[string]interface{}
result = make(map[string]interface{})
if !update {
if cur.Amount > 0 {
return false, nil
} else {
return true, nil
}
} else {
if cur.Amount == 0 {
return false, nil
} else {
if cur.Amount == 1 {
cur.FetchOne(&result)
if result[key].(string) == value {
return true, nil
} else {
return false, nil
}
} else {
return false, nil
}
}
return true, nil
}
}
// lSimple Queries
//helper structs
type singleDoc struct {
Doc interface{} `json:"document"`
}
//
func (c *Collection) All(skip, limit int) (*Cursor, error) {
var cur Cursor
if skip < 0 || limit < 0 {
return nil, errors.New("Invalid skip or limit")
}
query := map[string]interface{}{"collection": c.Name, "skip": skip, "limit": limit}
res, err := c.db.send("simple", "all", "PUT", query, &cur, &cur)
if err != nil {
return nil, err
}
if res.Status() == 201 {
return &cur, nil
} else {
return nil, errors.New("Failed to execute query")
}
}
//Simple query by example
func (c *Collection) Example(doc interface{}, skip, limit int) (*Cursor, error) {
var cur Cursor
if skip < 0 || limit < 0 {
return nil, errors.New("Invalid skip or limit")
}
query := map[string]interface{}{"collection": c.Name, "example": doc, "skip": skip, "limit": limit}
res, err := c.db.send("simple", "by-example", "PUT", query, &cur, &cur)
if err != nil {
return nil, err
}
if res.Status() == 201 {
return &cur, nil
} else {
return nil, errors.New("Failed to execute query")
}
}
// First returns first document in example query
func (c *Collection) First(example, doc interface{}) error {
var d singleDoc
d.Doc = doc
query := map[string]interface{}{"collection": c.Name, "example": example}
// sernd request
res, err := c.db.send("simple", "first-example", "PUT", query, &d, &doc)
if err != nil {
return err
}
if res.Status() == 200 {
return nil
} else {
return errors.New("Failed to execute query")
}
}
//Coditional query using skiplist index
func (c *Collection) ConditionSkipList(condition string, skip int, limit int, index string) (*Cursor, error) {
var cur Cursor
if skip < 0 || limit < 0 {
return nil, errors.New("Invalid skip or limit")
}
if condition == "" {
return nil, errors.New("Invalid conditions")
}
query := map[string]interface{}{"collection": c.Name, "index": index, "condition": condition, "skip": skip, "limit": limit}
res, err := c.db.send("simple", "by-condition-skiplist", "PUT", query, &cur, &cur)
if err != nil {
return nil, err
}
if res.Status() == 201 {
return &cur, nil
} else {
return nil, errors.New("Failed to execute query")
}
}
//Coditional query using bitarray index
func (c *Collection) ConditionBitArray(condition string, skip int, limit int, index string) (*Cursor, error) {
var cur Cursor
if skip < 0 || limit < 0 {
return nil, errors.New("Invalid skip or limit")
}
if condition == "" {
return nil, errors.New("Invalid conditions")
}
query := map[string]interface{}{"collection": c.Name, "index": index, "condition": condition, "skip": skip, "limit": limit}
res, err := c.db.send("simple", "by-condition-bitarray", "PUT", query, &cur, &cur)
if err != nil {
return nil, err
}
if res.Status() == 201 {
return &cur, nil
} else {
return nil, errors.New("Failed to execute query")
}
}
//Any returns random number
func (c *Collection) Any(doc interface{}) error {
var d singleDoc
d.Doc = doc
query := map[string]interface{}{"collection": c.Name}
res, err := c.db.send("simple", "any", "PUT", query, &d, &doc)
if err != nil {
return err
}
if res.Status() == 200 {
return nil
} else {
return errors.New("Failed to execute query")
}
}
//Indexes gets all indexs
func (c *Collection) Indexes() (map[string]Index, error) {
var indexes Indexes
_, err := c.db.get("index?collection="+c.Name, "", "GET", nil, &indexes, &indexes)
if err != nil {
return indexes.IndexMap, err
}
return indexes.IndexMap, err
}
// Delete Index
func (c *Collection) DeleteIndex(id string) error {
if id == "" {
return errors.New("Invalid id")
}
res, err := c.db.get("index", "id", "DELETE", nil, nil, nil)
if err != nil {
return err
}
if res.Status() == 404 {
return errors.New("Index does not exist")
}
return nil
}
//Create cap constraint
func (c *Collection) SetCap(size int64, bysize int64) error {
if size == 0 && bysize == 0 {
return errors.New("Invalid num and byte size")
}
if bysize > 0 && bysize < 16384 {
return errors.New("Invalid byte size, must be at least 16384")
}
capindex := map[string]interface{}{"type": "cap", "size": size, "byteSize": bysize}
res, err := c.db.send("index?collection="+c.Name, "", "POST", &capindex, nil, nil)
if err != nil {
return err
}
switch res.Status() {
case 400:
return errors.New("Invalid size or byte-size values")
case 404:
return errors.New("Collection does not exist")
default:
return nil
}
}
func (c *Collection) CreateHash(unique bool, fields ...string) error {
hashindex := map[string]interface{}{"type": "hash", "unique": unique, "fields": fields}
res, err := c.db.send("index?collection="+c.Name, "", "POST", &hashindex, nil, nil)
if err != nil {
return err
}
switch res.Status() {
case 400:
return errors.New("There are documents violating the uniqueness")
case 404:
return errors.New("Collection does not exist")
default:
return nil
}
}
func (c *Collection) CreateSkipList(unique bool, fields ...string) error {
skiplist := map[string]interface{}{"type": "skiplist", "unique": unique, "fields": fields}
res, err := c.db.send("index?collection="+c.Name, "", "POST", &skiplist, nil, nil)
if err != nil {
return err
}
switch res.Status() {
case 400:
return errors.New("There are documents violating the uniqueness")
case 404:
return errors.New("Collection does not exist")
default:
return nil
}
}
func (c *Collection) CreateGeoIndex(unique bool, geojson bool, fields ...string) error {
geoindex := map[string]interface{}{"type": "geo", "geoJson": geojson, "unique": unique, "fields": fields}
res, err := c.db.send("index?collection="+c.Name, "", "POST", &geoindex, nil, nil)
if err != nil {
return err
}
switch res.Status() {
case 400:
return errors.New("There are documents violating the uniqueness")
case 404:
return errors.New("Collection does not exist")
default:
return nil
}
}
func (c *Collection) Near(lat float64, lon float64, distance bool, geo string, skip, limit int) (*Cursor, error) {
var cur Cursor
if skip < 0 || limit < 0 {
return nil, errors.New("Invalid skip or limit")
}
var query map[string]interface{}
if distance {
query = map[string]interface{}{"collection": c.Name, "latitude": lat, "longitude": lon, "distance": "distance", "skip": skip, "limit": limit}
} else {
query = map[string]interface{}{"collection": c.Name, "latitude": lat, "longitude": lon, "skip": skip, "limit": limit}
}
if len(geo) > 0 {
query["geo"] = geo
}
res, err := c.db.send("simple", "near", "PUT", query, &cur, &cur)
if err != nil {
return nil, err
}
if res.Status() == 201 {
return &cur, nil
} else {
return nil, errors.New("Failed to execute query")
}
}
func (c *Collection) WithIn(radius float64, lat float64, lon float64, distance bool, geo string, skip, limit int) (*Cursor, error) {
var cur Cursor
if skip < 0 || limit < 0 {
return nil, errors.New("Invalid skip or limit")
}
var query map[string]interface{}
if distance {
query = map[string]interface{}{"collection": c.Name, "radius": radius, "latitude": lat, "longitude": lon, "distance": "distance", "skip": skip, "limit": limit}
} else {
query = map[string]interface{}{"collection": c.Name, "radius": radius, "latitude": lat, "longitude": lon, "skip": skip, "limit": limit}
}
if len(geo) > 0 {
query["geo"] = geo
}
res, err := c.db.send("simple", "near", "PUT", query, &cur, &cur)
if err != nil {
return nil, err
}
if res.Status() == 201 {
return &cur, nil
} else {
return nil, errors.New("Failed to execute query")
}
}
func (c *Collection) CreateFullText(min int, fields ...string) error {
full := map[string]interface{}{"type": "fulltext", "minLength": min, "fields": fields}
res, err := c.db.send("index?collection="+c.Name, "", "POST", &full, nil, nil)
if err != nil {
return err
}
switch res.Status() {
case 404:
return errors.New("Collection does not exist")
default:
return nil
}
}
func (c *Collection) FullText(q string, atr string, skip, limit int) (*Cursor, error) {
var cur Cursor
if skip < 0 || limit < 0 {
return nil, errors.New("Invalid skip or limit")
}
query := map[string]interface{}{"collection": c.Name, "query": q, "attribute": atr, "skip": skip, "limit": limit}
res, err := c.db.send("simple", "fulltext", "PUT", query, &cur, &cur)
if err != nil {
return nil, err
}
if res.Status() == 201 {
return &cur, nil
} else {
return nil, errors.New("Failed to execute query")
}
}
type Indexes struct {
Indexes []Index
IndexMap map[string]Index `json:"identifiers"`
}
type Index struct {
Id string `json:"id"`
Type string `json:"type"`
Unique bool `json:"unique"`
MinLength int `json:"minLength"`
Fields []string `json:"fields"`
Size int64 `json:"size"`
}