Add activity feeds API (#23494)

Close #5666

Add APIs for getting activity feeds.

routers/api/v1/repo/repo.go

@@ -10,6 +10,7 @@ import (
 	"strings"
 	"time"
 
+	activities_model "code.gitea.io/gitea/models/activities"
 	"code.gitea.io/gitea/models/db"
 	"code.gitea.io/gitea/models/organization"
 	"code.gitea.io/gitea/models/perm"
@@ -1199,3 +1200,59 @@ func ValidateIssueConfig(ctx *context.APIContext) {
 		ctx.JSON(http.StatusOK, api.IssueConfigValidation{Valid: false, Message: err.Error()})
 	}
 }
+
+func ListRepoActivityFeeds(ctx *context.APIContext) {
+	// swagger:operation GET /repos/{owner}/{repo}/activities/feeds repository repoListActivityFeeds
+	// ---
+	// summary: List a repository's activity feeds
+	// 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: date
+	//   in: query
+	//   description: the date of the activities to be found
+	//   type: string
+	//   format: date
+	// - name: page
+	//   in: query
+	//   description: page number of results to return (1-based)
+	//   type: integer
+	// - name: limit
+	//   in: query
+	//   description: page size of results
+	//   type: integer
+	// responses:
+	//   "200":
+	//     "$ref": "#/responses/ActivityFeedsList"
+	//   "404":
+	//     "$ref": "#/responses/notFound"
+
+	listOptions := utils.GetListOptions(ctx)
+
+	opts := activities_model.GetFeedsOptions{
+		RequestedRepo:  ctx.Repo.Repository,
+		Actor:          ctx.Doer,
+		IncludePrivate: true,
+		Date:           ctx.FormString("date"),
+		ListOptions:    listOptions,
+	}
+
+	feeds, count, err := activities_model.GetFeeds(ctx, opts)
+	if err != nil {
+		ctx.Error(http.StatusInternalServerError, "GetFeeds", err)
+		return
+	}
+	ctx.SetTotalCountHeader(count)
+
+	ctx.JSON(http.StatusOK, convert.ToActivities(ctx, feeds, ctx.Doer))
+}