Add API for manipulating Git hooks (#6436)

* Add API for manipulating Git hooks

Signed-off-by: Segev Finer <segev@codeocean.com>

* Replace code.gitea.io/sdk with PR branch temporarily for CI

* Switch back to code.gitea.io/sdk@master

* Return 403 instead of 404 on no permission to edit hooks in API

* Add tests for Git hooks API

* Update models/repo_list_test.go

Co-Authored-By: segevfiner <segev208@gmail.com>

* Update models/repo_list_test.go

Co-Authored-By: segevfiner <segev208@gmail.com>

* empty line

routers/api/v1/repo/git_hook.go

@@ -0,0 +1,187 @@
+// Copyright 2019 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package repo
+
+import (
+	"code.gitea.io/gitea/modules/context"
+	"code.gitea.io/gitea/modules/git"
+	"code.gitea.io/gitea/routers/api/v1/convert"
+	api "code.gitea.io/sdk/gitea"
+)
+
+// ListGitHooks list all Git hooks of a repository
+func ListGitHooks(ctx *context.APIContext) {
+	// swagger:operation GET /repos/{owner}/{repo}/hooks/git repository repoListGitHooks
+	// ---
+	// summary: List the Git hooks in a repository
+	// produces:
+	// - application/json
+	// parameters:
+	// - name: owner
+	//   in: path
+	//   description: owner of the repo
+	//   type: string
+	//   required: true
+	// - name: repo
+	//   in: path
+	//   description: name of the repo
+	//   type: string
+	//   required: true
+	// responses:
+	//   "200":
+	//     "$ref": "#/responses/GitHookList"
+	hooks, err := ctx.Repo.GitRepo.Hooks()
+	if err != nil {
+		ctx.Error(500, "Hooks", err)
+		return
+	}
+
+	apiHooks := make([]*api.GitHook, len(hooks))
+	for i := range hooks {
+		apiHooks[i] = convert.ToGitHook(hooks[i])
+	}
+	ctx.JSON(200, &apiHooks)
+}
+
+// GetGitHook get a repo's Git hook by id
+func GetGitHook(ctx *context.APIContext) {
+	// swagger:operation GET /repos/{owner}/{repo}/hooks/git/{id} repository repoGetGitHook
+	// ---
+	// summary: Get a Git hook
+	// produces:
+	// - application/json
+	// parameters:
+	// - name: owner
+	//   in: path
+	//   description: owner of the repo
+	//   type: string
+	//   required: true
+	// - name: repo
+	//   in: path
+	//   description: name of the repo
+	//   type: string
+	//   required: true
+	// - name: id
+	//   in: path
+	//   description: id of the hook to get
+	//   type: string
+	//   required: true
+	// responses:
+	//   "200":
+	//     "$ref": "#/responses/GitHook"
+	//   "404":
+	//     "$ref": "#/responses/notFound"
+	hookID := ctx.Params(":id")
+	hook, err := ctx.Repo.GitRepo.GetHook(hookID)
+	if err != nil {
+		if err == git.ErrNotValidHook {
+			ctx.NotFound()
+		} else {
+			ctx.Error(500, "GetHook", err)
+		}
+		return
+	}
+	ctx.JSON(200, convert.ToGitHook(hook))
+}
+
+// EditGitHook modify a Git hook of a repository
+func EditGitHook(ctx *context.APIContext, form api.EditGitHookOption) {
+	// swagger:operation PATCH /repos/{owner}/{repo}/hooks/git/{id} repository repoEditGitHook
+	// ---
+	// summary: Edit a Git hook in a repository
+	// produces:
+	// - application/json
+	// parameters:
+	// - name: owner
+	//   in: path
+	//   description: owner of the repo
+	//   type: string
+	//   required: true
+	// - name: repo
+	//   in: path
+	//   description: name of the repo
+	//   type: string
+	//   required: true
+	// - name: id
+	//   in: path
+	//   description: id of the hook to get
+	//   type: string
+	//   required: true
+	// - name: body
+	//   in: body
+	//   schema:
+	//     "$ref": "#/definitions/EditGitHookOption"
+	// responses:
+	//   "200":
+	//     "$ref": "#/responses/GitHook"
+	//   "404":
+	//     "$ref": "#/responses/notFound"
+	hookID := ctx.Params(":id")
+	hook, err := ctx.Repo.GitRepo.GetHook(hookID)
+	if err != nil {
+		if err == git.ErrNotValidHook {
+			ctx.NotFound()
+		} else {
+			ctx.Error(500, "GetHook", err)
+		}
+		return
+	}
+
+	hook.Content = form.Content
+	if err = hook.Update(); err != nil {
+		ctx.Error(500, "hook.Update", err)
+		return
+	}
+
+	ctx.JSON(200, convert.ToGitHook(hook))
+}
+
+// DeleteGitHook delete a Git hook of a repository
+func DeleteGitHook(ctx *context.APIContext) {
+	// swagger:operation DELETE /repos/{owner}/{repo}/hooks/git/{id} repository repoDeleteGitHook
+	// ---
+	// summary: Delete a Git hook in a repository
+	// produces:
+	// - application/json
+	// parameters:
+	// - name: owner
+	//   in: path
+	//   description: owner of the repo
+	//   type: string
+	//   required: true
+	// - name: repo
+	//   in: path
+	//   description: name of the repo
+	//   type: string
+	//   required: true
+	// - name: id
+	//   in: path
+	//   description: id of the hook to get
+	//   type: string
+	//   required: true
+	// responses:
+	//   "204":
+	//     "$ref": "#/responses/empty"
+	//   "404":
+	//     "$ref": "#/responses/notFound"
+	hookID := ctx.Params(":id")
+	hook, err := ctx.Repo.GitRepo.GetHook(hookID)
+	if err != nil {
+		if err == git.ErrNotValidHook {
+			ctx.NotFound()
+		} else {
+			ctx.Error(500, "GetHook", err)
+		}
+		return
+	}
+
+	hook.Content = ""
+	if err = hook.Update(); err != nil {
+		ctx.Error(500, "hook.Update", err)
+		return
+	}
+
+	ctx.Status(204)
+}