From a65cf086f0192b984ec6f18142cd9281684feccd Mon Sep 17 00:00:00 2001
From: Howl <the@howl.moe>
Date: Mon, 13 Jun 2016 22:40:01 +0200
Subject: [PATCH] Add Documentation API

---
 app/start.go     |  3 ++
 app/v1/doc.go    | 92 ++++++++++++++++++++++++++++++++++++++++++++++++
 app/v1/friend.go |  2 +-
 common/int.go    |  2 ++
 4 files changed, 98 insertions(+), 1 deletion(-)
 create mode 100644 app/v1/doc.go

diff --git a/app/start.go b/app/start.go
index 49e908e..13dd0c1 100644
--- a/app/start.go
+++ b/app/start.go
@@ -29,6 +29,9 @@ func Start(conf common.Conf, dbO *sql.DB) *gin.Engine {
 			gv1.GET("/ping", Method(v1.PingGET))
 			gv1.GET("/surprise_me", Method(v1.SurpriseMeGET))
 			gv1.GET("/privileges", Method(v1.PrivilegesGET))
+			gv1.GET("/doc", Method(v1.DocGET))
+			gv1.GET("/doc/content", Method(v1.DocContentGET))
+			gv1.GET("/doc/rules", Method(v1.DocRulesGET))
 
 			// Read privilege required
 			gv1.GET("/users", Method(v1.UsersGET, common.PrivilegeRead))
diff --git a/app/v1/doc.go b/app/v1/doc.go
new file mode 100644
index 0000000..53c38b0
--- /dev/null
+++ b/app/v1/doc.go
@@ -0,0 +1,92 @@
+package v1
+
+import (
+	"database/sql"
+
+	"git.zxq.co/ripple/rippleapi/common"
+)
+
+type docFile struct {
+	ID      int    `json:"id"`
+	DocName string `json:"doc_name"`
+	Public  bool   `json:"public"`
+	IsRule  bool   `json:"is_rule"`
+}
+
+type docResponse struct {
+	common.ResponseBase
+	Files []docFile `json:"files"`
+}
+
+// DocGET retrieves a list of documentation files.
+func DocGET(md common.MethodData) common.CodeMessager {
+	var wc string
+	if !md.User.Privileges.HasPrivilegeBlog() || md.C.Query("public") == "1" {
+		wc = "WHERE public = '1'"
+	}
+	rows, err := md.DB.Query("SELECT id, doc_name, public, is_rule FROM docs " + wc)
+	if err != nil {
+		md.Err(err)
+		return Err500
+	}
+	var r docResponse
+	for rows.Next() {
+		var f docFile
+		err := rows.Scan(&f.ID, &f.DocName, &f.Public, &f.IsRule)
+		if err != nil {
+			md.Err(err)
+			return Err500
+		}
+		r.Files = append(r.Files, f)
+	}
+	r.Code = 200
+	return r
+}
+
+type docContentResponse struct {
+	common.ResponseBase
+	Content string `json:"content"`
+}
+
+// DocContentGET retrieves the raw markdown file of a doc file
+func DocContentGET(md common.MethodData) common.CodeMessager {
+	docID := common.Int(md.C.Query("id"))
+	if docID == 0 {
+		return common.SimpleResponse(404, "Documentation file not found!")
+	}
+	var wc string
+	if !md.User.Privileges.HasPrivilegeBlog() || md.C.Query("public") == "1" {
+		wc = "AND public = '1'"
+	}
+	var r docContentResponse
+	err := md.DB.QueryRow("SELECT doc_contents FROM docs WHERE id = ? "+wc+" LIMIT 1", docID).Scan(&r.Content)
+	switch {
+	case err == sql.ErrNoRows:
+		r.Code = 404
+		r.Message = "Documentation file not found!"
+	case err != nil:
+		md.Err(err)
+		return Err500
+	default:
+		r.Code = 200
+	}
+	return r
+}
+
+// DocRulesGET gets the rules.
+func DocRulesGET(md common.MethodData) common.CodeMessager {
+	var r docContentResponse
+	err := md.DB.QueryRow("SELECT doc_contents FROM docs WHERE is_rule = '1' LIMIT 1").Scan(&r.Content)
+	const ruleFree = "# This Ripple instance is rule-free! Yay!"
+	switch {
+	case err == sql.ErrNoRows:
+		r.Content = ruleFree
+	case err != nil:
+		md.Err(err)
+		return Err500
+	case len(r.Content) == 0:
+		r.Content = ruleFree
+	}
+	r.Code = 200
+	return r
+}
diff --git a/app/v1/friend.go b/app/v1/friend.go
index f950322..96be9a8 100644
--- a/app/v1/friend.go
+++ b/app/v1/friend.go
@@ -121,7 +121,7 @@ func FriendsWithGET(md common.MethodData) common.CodeMessager {
 	if uid == 0 {
 		return r
 	}
-	err = md.DB.QueryRow("SELECT EXISTS(SELECT 1 FROM users_relationships WHERE user1 = ? AND user2 = ? LIMIT 1), EXISTS(SELECT 1 FROM users_relationships WHERE user2 = ? AND user1 = ? LIMIT 1)", md.ID(), uid, md.ID(), uid).Scan(&r.Friends, &r.Mutual)
+	err := md.DB.QueryRow("SELECT EXISTS(SELECT 1 FROM users_relationships WHERE user1 = ? AND user2 = ? LIMIT 1), EXISTS(SELECT 1 FROM users_relationships WHERE user2 = ? AND user1 = ? LIMIT 1)", md.ID(), uid, md.ID(), uid).Scan(&r.Friends, &r.Mutual)
 	if err != sql.ErrNoRows && err != nil {
 		md.Err(err)
 		return Err500
diff --git a/common/int.go b/common/int.go
index 7c0ae26..152fc96 100644
--- a/common/int.go
+++ b/common/int.go
@@ -1,5 +1,7 @@
 package common
 
+import "strconv"
+
 // Int converts s to an int. If s in an invalid int, it defaults to 0.
 func Int(s string) int {
 	r, _ := strconv.Atoi(s)