[addons] Creating foundation for plugin-like system "Addons" (#24)

* adding addons dir and sample addon which enables the use of a new input element in forms for referencing other content. "addons" is a conceptual plugin-like feature, similar to wordpress "plugins" dir, but not as sophisticated

1 files changed, 44 insertions, 0 deletions

diff --git a/system/db/config.go b/system/db/config.go
index b5a07e4..4bbf29b 100644
--- a/system/db/config.go
+++ b/system/db/config.go
@@ -3,6 +3,7 @@ package db
 import (
 	"bytes"
 	"encoding/json"
+	"fmt"
 	"net/url"
 	"strings"
 
@@ -117,7 +118,50 @@ func ConfigAll() ([]byte, error) {
 	return val.Bytes(), nil
 }
 
+// PutConfig updates a single k/v in the config
+func PutConfig(key string, value interface{}) error {
+	kv := make(map[string]interface{})
+
+	c, err := ConfigAll()
+	if err != nil {
+		return err
+	}
+
+	err = json.Unmarshal(c, &kv)
+	if err != nil {
+		return err
+	}
+
+	// set k/v from params to decoded map
+	kv[key] = value
+
+	data := make(url.Values)
+	for k, v := range kv {
+		switch v.(type) {
+		case string:
+			data.Set(k, v.(string))
+
+		case []string:
+			vv := v.([]string)
+			for i := range vv {
+				data.Add(k, vv[i])
+			}
+
+		default:
+			data.Set(k, fmt.Sprintf("%v", v))
+		}
+	}
+
+	err = SetConfig(data)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
 // ConfigCache is a in-memory cache of the Configs for quicker lookups
+// 'key' is the JSON tag associated with the config field
 func ConfigCache(key string) string {
 	return configCache.Get(key)
 }