1 files changed, 182 insertions, 0 deletions
diff --git a/system/db/content.go b/system/db/content.go
new file mode 100644
index 0000000..cbe4f14
--- /dev/null
+++ b/system/db/content.go
@@ -0,0 +1,182 @@
+package db
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"net/url"
+	"strconv"
+	"strings"
+
+	"github.com/boltdb/bolt"
+	"github.com/gorilla/schema"
+	"github.com/nilslice/cms/content"
+	"github.com/nilslice/cms/management/editor"
+	"github.com/nilslice/cms/management/manager"
+)
+
+// SetContent inserts or updates values in the database.
+// The `target` argument is a string made up of namespace:id (string:int)
+func SetContent(target string, data url.Values) (int, error) {
+	t := strings.Split(target, ":")
+	ns, id := t[0], t[1]
+
+	// check if content id == -1 (indicating new post).
+	// if so, run an insert which will assign the next auto incremented int.
+	// this is done because boltdb begins its bucket auto increment value at 0,
+	// which is the zero-value of an int in the Item struct field for ID.
+	// this is a problem when the original first post (with auto ID = 0) gets
+	// overwritten by any new post, originally having no ID, defauting to 0.
+	if id == "-1" {
+		return insert(ns, data)
+	}
+
+	return update(ns, id, data)
+}
+
+func update(ns, id string, data url.Values) (int, error) {
+	cid, err := strconv.Atoi(id)
+	if err != nil {
+		return 0, err
+	}
+
+	err = store.Update(func(tx *bolt.Tx) error {
+		b, err := tx.CreateBucketIfNotExists([]byte(ns))
+		if err != nil {
+			return err
+		}
+
+		j, err := postToJSON(ns, data)
+		if err != nil {
+			return err
+		}
+
+		err = b.Put([]byte(fmt.Sprintf("%d", cid)), j)
+		if err != nil {
+			return err
+		}
+
+		return nil
+	})
+	if err != nil {
+		return 0, nil
+	}
+
+	return cid, nil
+}
+
+func insert(ns string, data url.Values) (int, error) {
+	var effectedID int
+	err := store.Update(func(tx *bolt.Tx) error {
+		b, err := tx.CreateBucketIfNotExists([]byte(ns))
+		if err != nil {
+			return err
+		}
+
+		// get the next available ID and convert to string
+		// also set effectedID to int of ID
+		id, err := b.NextSequence()
+		if err != nil {
+			return err
+		}
+		cid := strconv.FormatUint(id, 10)
+		effectedID, err = strconv.Atoi(cid)
+		if err != nil {
+			return err
+		}
+		data.Add("id", cid)
+
+		j, err := postToJSON(ns, data)
+		if err != nil {
+			return err
+		}
+
+		err = b.Put([]byte(cid), j)
+		if err != nil {
+			return err
+		}
+
+		return nil
+	})
+	if err != nil {
+		return 0, err
+	}
+
+	return effectedID, nil
+}
+
+func postToJSON(ns string, data url.Values) ([]byte, error) {
+	// find the content type and decode values into it
+	t, ok := content.Types[ns]
+	if !ok {
+		return nil, fmt.Errorf(content.ErrTypeNotRegistered, ns)
+	}
+	post := t()
+
+	dec := schema.NewDecoder()
+	dec.SetAliasTag("json")     // allows simpler struct tagging when creating a content type
+	dec.IgnoreUnknownKeys(true) // will skip over form values submitted, but not in struct
+	err := dec.Decode(post, data)
+	if err != nil {
+		return nil, err
+	}
+
+	slug, err := manager.Slug(post.(editor.Editable))
+	if err != nil {
+		return nil, err
+	}
+	post.(editor.Editable).SetSlug(slug)
+
+	// marshall content struct to json for db storage
+	j, err := json.Marshal(post)
+	if err != nil {
+		return nil, err
+	}
+
+	return j, nil
+}
+
+// Content retrives one item from the database. Non-existent values will return an empty []byte
+// The `target` argument is a string made up of namespace:id (string:int)
+func Content(target string) ([]byte, error) {
+	t := strings.Split(target, ":")
+	ns, id := t[0], t[1]
+
+	val := &bytes.Buffer{}
+	err := store.View(func(tx *bolt.Tx) error {
+		b := tx.Bucket([]byte(ns))
+		_, err := val.Write(b.Get([]byte(id)))
+		if err != nil {
+			fmt.Println(err)
+			return err
+		}
+
+		return nil
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	return val.Bytes(), nil
+}
+
+// ContentAll retrives all items from the database within the provided namespace
+func ContentAll(namespace string) [][]byte {
+	var posts [][]byte
+	store.View(func(tx *bolt.Tx) error {
+		b := tx.Bucket([]byte(namespace))
+
+		len := b.Stats().KeyN
+		posts = make([][]byte, 0, len)
+
+		b.ForEach(func(k, v []byte) error {
+			posts = append(posts, v)
+
+			return nil
+		})
+
+		return nil
+	})
+
+	return posts
+}