chore: Move httpapi, httpmw, & database into coderd (#568)

* chore: Move httpmw to /coderd directory
httpmw is specific to coderd and should be scoped under coderd

* chore: Move httpapi to /coderd directory
httpapi is specific to coderd and should be scoped under coderd

* chore: Move database  to /coderd directory
database is specific to coderd and should be scoped under coderd

* chore: Update codecov & gitattributes for generated files
* chore: Update Makefile

coderd/httpmw/projectparam.go

@@ -0,0 +1,53 @@
+package httpmw
+
+import (
+	"context"
+	"database/sql"
+	"errors"
+	"fmt"
+	"net/http"
+
+	"github.com/go-chi/chi/v5"
+
+	"github.com/coder/coder/coderd/database"
+	"github.com/coder/coder/coderd/httpapi"
+)
+
+type projectParamContextKey struct{}
+
+// ProjectParam returns the project from the ExtractProjectParam handler.
+func ProjectParam(r *http.Request) database.Project {
+	project, ok := r.Context().Value(projectParamContextKey{}).(database.Project)
+	if !ok {
+		panic("developer error: project param middleware not provided")
+	}
+	return project
+}
+
+// ExtractProjectParam grabs a project from the "project" URL parameter.
+func ExtractProjectParam(db database.Store) func(http.Handler) http.Handler {
+	return func(next http.Handler) http.Handler {
+		return http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
+			projectID, parsed := parseUUID(rw, r, "project")
+			if !parsed {
+				return
+			}
+			project, err := db.GetProjectByID(r.Context(), projectID)
+			if errors.Is(err, sql.ErrNoRows) {
+				httpapi.Write(rw, http.StatusNotFound, httpapi.Response{
+					Message: fmt.Sprintf("project %q does not exist", projectID),
+				})
+			}
+			if err != nil {
+				httpapi.Write(rw, http.StatusInternalServerError, httpapi.Response{
+					Message: fmt.Sprintf("get project: %s", err),
+				})
+				return
+			}
+
+			ctx := context.WithValue(r.Context(), projectParamContextKey{}, project)
+			chi.RouteContext(ctx).URLParams.Add("organization", project.OrganizationID)
+			next.ServeHTTP(rw, r.WithContext(ctx))
+		})
+	}
+}