[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

3 files changed, 6 insertions, 159 deletions

diff --git a/content/doc.go b/content/doc.go
new file mode 100644
index 0000000..3e15b11
--- /dev/null
+++ b/content/doc.go
@@ -0,0 +1,6 @@
+// Package content contains all user-supplied content which the system is to
+// manage. Generate content types by using the Ponzu command line tool 'ponzu'
+// by running `$ ponzu generate <contentName> <fieldName:type...>`
+// Note: doc.go file is required to build the Ponzu command since main.go
+// imports content package to a blank identifier.
+package content
diff --git a/content/item.go b/content/item.go
deleted file mode 100644
index eb79aa0..0000000
--- a/content/item.go
+++ /dev/null
@@ -1,138 +0,0 @@
-package content
-
-import (
-	"fmt"
-	"net/http"
-
-	uuid "github.com/satori/go.uuid"
-)
-
-// Sluggable makes a struct locatable by URL with it's own path
-// As an Item implementing Sluggable, slugs may overlap. If this is an issue,
-// make your content struct (or one which imbeds Item) implement Sluggable
-// and it will override the slug created by Item's SetSlug with your struct's
-type Sluggable interface {
-	SetSlug(string)
-	ItemSlug() string
-}
-
-// Identifiable enables a struct to have its ID set/get. Typically this is done
-// to set an ID to -1 indicating it is new for DB inserts, since by default
-// a newly initialized struct would have an ID of 0, the int zero-value, and
-// BoltDB's starting key per bucket is 0, thus overwriting the first record.
-type Identifiable interface {
-	ItemID() int
-	SetItemID(int)
-	UniqueID() uuid.UUID
-	String() string
-}
-
-// Hookable provides our user with an easy way to intercept or add functionality
-// to the different lifecycles/events a struct may encounter. Item implements
-// Hookable with no-ops so our user can override only whichever ones necessary.
-type Hookable interface {
-	BeforeSave(req *http.Request) error
-	AfterSave(req *http.Request) error
-
-	BeforeDelete(req *http.Request) error
-	AfterDelete(req *http.Request) error
-
-	BeforeApprove(req *http.Request) error
-	AfterApprove(req *http.Request) error
-
-	BeforeReject(req *http.Request) error
-	AfterReject(req *http.Request) error
-}
-
-// Item should only be embedded into content type structs.
-type Item struct {
-	UUID      uuid.UUID `json:"uuid"`
-	ID        int       `json:"id"`
-	Slug      string    `json:"slug"`
-	Timestamp int64     `json:"timestamp"`
-	Updated   int64     `json:"updated"`
-}
-
-// Time partially implements the Sortable interface
-func (i Item) Time() int64 {
-	return i.Timestamp
-}
-
-// Touch partially implements the Sortable interface
-func (i Item) Touch() int64 {
-	return i.Updated
-}
-
-// SetSlug sets the item's slug for its URL
-func (i *Item) SetSlug(slug string) {
-	i.Slug = slug
-}
-
-// ItemSlug sets the item's slug for its URL
-func (i *Item) ItemSlug() string {
-	return i.Slug
-}
-
-// ItemID gets the Item's ID field
-// partially implements the Identifiable interface
-func (i Item) ItemID() int {
-	return i.ID
-}
-
-// SetItemID sets the Item's ID field
-// partially implements the Identifiable interface
-func (i *Item) SetItemID(id int) {
-	i.ID = id
-}
-
-// UniqueID gets the Item's UUID field
-// partially implements the Identifiable interface
-func (i Item) UniqueID() uuid.UUID {
-	return i.UUID
-}
-
-// String formats an Item into a printable value
-// partially implements the Identifiable interface
-func (i Item) String() string {
-	return fmt.Sprintf("Item ID: %s", i.UniqueID())
-}
-
-// BeforeSave is a no-op to ensure structs which embed Item implement Hookable
-func (i Item) BeforeSave(req *http.Request) error {
-	return nil
-}
-
-// AfterSave is a no-op to ensure structs which embed Item implement Hookable
-func (i Item) AfterSave(req *http.Request) error {
-	return nil
-}
-
-// BeforeDelete is a no-op to ensure structs which embed Item implement Hookable
-func (i Item) BeforeDelete(req *http.Request) error {
-	return nil
-}
-
-// AfterDelete is a no-op to ensure structs which embed Item implement Hookable
-func (i Item) AfterDelete(req *http.Request) error {
-	return nil
-}
-
-// BeforeApprove is a no-op to ensure structs which embed Item implement Hookable
-func (i Item) BeforeApprove(req *http.Request) error {
-	return nil
-}
-
-// AfterApprove is a no-op to ensure structs which embed Item implement Hookable
-func (i Item) AfterApprove(req *http.Request) error {
-	return nil
-}
-
-// BeforeReject is a no-op to ensure structs which embed Item implement Hookable
-func (i Item) BeforeReject(req *http.Request) error {
-	return nil
-}
-
-// AfterReject is a no-op to ensure structs which embed Item implement Hookable
-func (i Item) AfterReject(req *http.Request) error {
-	return nil
-}
diff --git a/content/types.go b/content/types.go
deleted file mode 100644
index 696d589..0000000
--- a/content/types.go
+++ /dev/null
@@ -1,21 +0,0 @@
-package content
-
-const (
-	// ErrTypeNotRegistered means content type isn't registered (not found in Types map)
-	ErrTypeNotRegistered = `Error:
-There is no type registered for %[1]s
-
-Add this to the file which defines %[1]s{} in the 'content' package:
-
-
-	func init() {			
-		Types["%[1]s"] = func() interface{} { return new(%[1]s) }
-	}		
-				
-
-`
-)
-
-// Types is a map used to reference a type name to its actual Editable type
-// mainly for lookups in /admin route based utilities
-var Types = make(map[string]func() interface{})