graph2: Added File type and queries.

models/file.go

@@ -0,0 +1,16 @@
+package models
+
+import "time"
+
+// A File is a record of a file stored in the Space.
+type File struct {
+	ID       string    `bson:"_id" json:"id"`
+	Time     time.Time `bson:"time" json:"time"`
+	Kind     string    `bson:"kind" json:"kind"`
+	Public   bool      `bson:"public" json:"public"`
+	Name     string    `bson:"name" json:"name"`
+	MimeType string    `bson:"mimeType" json:"mimeType"`
+	Size     int64     `bson:"size" json:"size"`
+	Author   string    `bson:"author" json:"author"`
+	URL      string    `bson:"url,omitempty" json:"url,omitempty"`
+}

models/files/db.go

@@ -0,0 +1,81 @@
+package files
+
+import (
+	"crypto/rand"
+	"encoding/binary"
+	"strconv"
+	"time"
+
+	"git.aiterp.net/rpdata/api/internal/store"
+	"git.aiterp.net/rpdata/api/models"
+	"github.com/globalsign/mgo"
+)
+
+var collection *mgo.Collection
+
+func find(query interface{}) (models.File, error) {
+	file := models.File{}
+
+	err := collection.Find(query).One(&file)
+	if err != nil {
+		return models.File{}, err
+	}
+
+	return file, nil
+}
+
+func list(query interface{}) ([]models.File, error) {
+	list := make([]models.File, 0, 32)
+
+	err := collection.Find(query).Sort("-time").All(&list)
+	if err != nil {
+		return nil, err
+	}
+
+	return list, nil
+}
+
+// makeID makes a random file ID that's 32 characters long
+func makeID() string {
+	result := "F" + strconv.FormatInt(time.Now().UnixNano(), 36)
+	offset := 0
+	data := make([]byte, 32)
+
+	rand.Read(data)
+	for len(result) < 32 {
+		result += strconv.FormatUint(binary.LittleEndian.Uint64(data[offset:]), 36)
+		offset += 8
+
+		if offset >= 32 {
+			rand.Read(data)
+			offset = 0
+		}
+	}
+
+	return result[:32]
+}
+
+func init() {
+	store.HandleInit(func(db *mgo.Database) {
+		collection = db.C("file.headers")
+
+		collection.EnsureIndexKey("author")
+		collection.EnsureIndexKey("public")
+		collection.EnsureIndexKey("kind", "name", "author")
+		collection.EnsureIndexKey("author", "public")
+		collection.EnsureIndexKey("kind")
+	})
+}
+
+var allowdMimeTypes = map[string]bool{
+	"":                    false,
+	"image/jpeg":          true,
+	"image/png":           true,
+	"image/gif":           true,
+	"text/plain":          true,
+	"application/json":    true,
+	"application/pdf":     false,
+	"binary/octet-stream": false,
+	"video/mp4":           false,
+	"audio/mp3":           false,
+}

models/files/find.go

@@ -0,0 +1,11 @@
+package files
+
+import (
+	"git.aiterp.net/rpdata/api/models"
+	"github.com/globalsign/mgo/bson"
+)
+
+// FindID finds a file by ID
+func FindID(id string) (models.File, error) {
+	return find(bson.M{"_id": id})
+}

models/files/list.go

@@ -0,0 +1,36 @@
+package files
+
+import (
+	"git.aiterp.net/rpdata/api/models"
+	"github.com/globalsign/mgo/bson"
+)
+
+// Filter for files.List
+type Filter struct {
+	Author   *string
+	Public   *bool
+	MimeType []string
+}
+
+// List lists files according to the standard lookup. By default it's just the author's own files,
+// but if `public` is true it will alos include files made public by other authors. If `mimeTypes` contains
+// any, it will limit the results to that. If `author` is empty, it will only list public files
+func List(filter *Filter) ([]models.File, error) {
+	query := bson.M{}
+
+	if filter != nil {
+		if filter.Author != nil {
+			query["author"] = *filter.Author
+		}
+
+		if filter.Public != nil {
+			query["public"] = *filter.Public
+		}
+
+		if len(filter.MimeType) > 0 {
+			query["mimeTypes"] = bson.M{"$in": filter.MimeType}
+		}
+	}
+
+	return list(query)
+}