From dd72a1f4c18948d064be05b2e6e5a6ec00c3ddac Mon Sep 17 00:00:00 2001
From: sam <sam@sleepycat.moe>
Date: Wed, 6 Sep 2023 02:40:50 +0200
Subject: [PATCH] add /blogs/{blogID} and /blogs/lookup/{blogName} routes

---
 internal/database/token.go |  2 ++
 web/api/blogs/get_blog.go  | 74 ++++++++++++++++++++++++++++++++++++++
 web/api/blogs/module.go    | 13 +++++++
 web/api/error.go           |  9 ++++-
 web/routes.go              |  7 ++++
 5 files changed, 104 insertions(+), 1 deletion(-)
 create mode 100644 web/api/blogs/get_blog.go
 create mode 100644 web/api/blogs/module.go

diff --git a/internal/database/token.go b/internal/database/token.go
index f40f582..6577396 100644
--- a/internal/database/token.go
+++ b/internal/database/token.go
@@ -53,6 +53,8 @@ const (
 	// Controls whether tokens have access to sensitive account data, NOT if they can use `/accounts/@me` endpoints.
 	TokenScopeAccountsMe    TokenScope = "accounts.me"
 	TokenScopeAccountsWrite TokenScope = "accounts.write"
+	TokenScopeBlogsRead     TokenScope = "blogs.read"
+	TokenScopeBlogsWrite    TokenScope = "blogs.write"
 )
 
 func (s TokenScope) IsValid() bool {
diff --git a/web/api/blogs/get_blog.go b/web/api/blogs/get_blog.go
new file mode 100644
index 0000000..12e511f
--- /dev/null
+++ b/web/api/blogs/get_blog.go
@@ -0,0 +1,74 @@
+package blogs
+
+import (
+	"net/http"
+
+	"git.sleepycat.moe/sam/mercury/internal/database/sql"
+	"git.sleepycat.moe/sam/mercury/web/api"
+	"github.com/go-chi/chi/v5"
+	"github.com/oklog/ulid/v2"
+	"github.com/rs/zerolog/log"
+)
+
+func (app *App) GetID(w http.ResponseWriter, r *http.Request) (api.Blog, error) {
+	ctx := r.Context()
+	id, err := ulid.Parse(chi.URLParamFromCtx(ctx, "blogID"))
+	if err != nil {
+		return api.Blog{}, api.Error{Code: api.ErrBlogNotFound}
+	}
+
+	conn, err := app.Database.Acquire(ctx)
+	if err != nil {
+		log.Err(err).Msg("acquiring connection")
+		return api.Blog{}, err
+	}
+	defer conn.Release()
+
+	blog, err := app.Blog(conn).ByID(ctx, id)
+	if err != nil {
+		if err == sql.ErrNotFound {
+			return api.Blog{}, api.Error{Code: api.ErrBlogNotFound}
+		}
+
+		log.Err(err).Str("id", id.String()).Msg("fetching blog from database")
+		return api.Blog{}, err
+	}
+
+	acct, err := app.Account(conn).ByID(ctx, blog.AccountID)
+	if err != nil {
+		log.Err(err).Str("id", blog.AccountID.String()).Msg("fetching account from database")
+		return api.Blog{}, err
+	}
+
+	return api.DBBlogToBlog(blog, acct), nil
+}
+
+func (app *App) LookupName(w http.ResponseWriter, r *http.Request) (api.Blog, error) {
+	ctx := r.Context()
+	name := chi.URLParamFromCtx(ctx, "blogName")
+
+	conn, err := app.Database.Acquire(ctx)
+	if err != nil {
+		log.Err(err).Msg("acquiring connection")
+		return api.Blog{}, err
+	}
+	defer conn.Release()
+
+	blog, err := app.Blog(conn).ByName(ctx, name, "")
+	if err != nil {
+		if err == sql.ErrNotFound {
+			return api.Blog{}, api.Error{Code: api.ErrBlogNotFound}
+		}
+
+		log.Err(err).Str("name", name).Msg("fetching blog from database")
+		return api.Blog{}, err
+	}
+
+	acct, err := app.Account(conn).ByID(ctx, blog.AccountID)
+	if err != nil {
+		log.Err(err).Str("id", blog.AccountID.String()).Msg("fetching account from database")
+		return api.Blog{}, err
+	}
+
+	return api.DBBlogToBlog(blog, acct), nil
+}
diff --git a/web/api/blogs/module.go b/web/api/blogs/module.go
new file mode 100644
index 0000000..6d651b5
--- /dev/null
+++ b/web/api/blogs/module.go
@@ -0,0 +1,13 @@
+package blogs
+
+import "git.sleepycat.moe/sam/mercury/web/app"
+
+type App struct {
+	*app.App
+}
+
+func New(app *app.App) *App {
+	return &App{
+		App: app,
+	}
+}
diff --git a/web/api/error.go b/web/api/error.go
index 226ffd3..92368cc 100644
--- a/web/api/error.go
+++ b/web/api/error.go
@@ -126,7 +126,10 @@ const (
 	ErrMissingScope = 1002
 
 	// Account related
-	ErrAccountNotFound = 1003
+	ErrAccountNotFound = 2001
+
+	// Blog related
+	ErrBlogNotFound = 3001
 )
 
 func ErrCodeMessage(code int) string {
@@ -145,6 +148,8 @@ var errCodeMessages = map[int]string{
 	ErrMissingScope: "Token is missing required scope for this endpoint",
 
 	ErrAccountNotFound: "Account not found",
+
+	ErrBlogNotFound: "Blog not found",
 }
 
 func ErrCodeStatus(code int) int {
@@ -163,4 +168,6 @@ var errCodeStatuses = map[int]int{
 	ErrMissingScope: http.StatusForbidden,
 
 	ErrAccountNotFound: http.StatusNotFound,
+
+	ErrBlogNotFound: http.StatusNotFound,
 }
diff --git a/web/routes.go b/web/routes.go
index 853d58e..2c35f3e 100644
--- a/web/routes.go
+++ b/web/routes.go
@@ -4,6 +4,7 @@ import (
 	"git.sleepycat.moe/sam/mercury/internal/database"
 	"git.sleepycat.moe/sam/mercury/web/api"
 	"git.sleepycat.moe/sam/mercury/web/api/accounts"
+	"git.sleepycat.moe/sam/mercury/web/api/blogs"
 	"git.sleepycat.moe/sam/mercury/web/app"
 	"git.sleepycat.moe/sam/mercury/web/auth"
 	"git.sleepycat.moe/sam/mercury/web/frontend"
@@ -43,5 +44,11 @@ func Routes(app *app.App) {
 			Get("/accounts/{accountID}", api.WrapHandlerT(accounts.GetID))
 		r.With(app.APIAuth(database.TokenScopeAccountsMe, false)).
 			Get("/accounts/@me", api.WrapHandlerT(accounts.GetMe))
+
+		blogs := blogs.New(app)
+		r.With(app.APIAuth(database.TokenScopeBlogsRead, true)).
+			Get("/blogs/{blogID}", api.WrapHandlerT(blogs.GetID))
+		r.With(app.APIAuth(database.TokenScopeBlogsRead, true)).
+			Get("/blogs/lookup/{blogName}", api.WrapHandlerT(blogs.LookupName))
 	})
 }