From 9b9addf3e6ae6ba5efa0445548cd142fe6baae19 Mon Sep 17 00:00:00 2001
From: Nazar Kanaev <nkanaev@live.com>
Date: Tue, 20 Oct 2020 22:52:53 +0100
Subject: [PATCH] fever items (with_ids, since_id)

---
 server/fever.go | 72 +++++++++++++++++++++++++++++++++++++++++++++++--
 storage/item.go | 25 ++++++++++++++---
 2 files changed, 92 insertions(+), 5 deletions(-)

diff --git a/server/fever.go b/server/fever.go
index 1280699..894062d 100644
--- a/server/fever.go
+++ b/server/fever.go
@@ -1,11 +1,12 @@
 package server
 
 import (
+	"encoding/base64"
 	"fmt"
 	"github.com/nkanaev/yarr/storage"
 	"net/http"
+	"strconv"
 	"strings"
-	"encoding/base64"
 )
 
 var feverHandlers = map[string]func(rw http.ResponseWriter, req *http.Request){
@@ -40,8 +41,20 @@ type FeverFeed struct {
 	LastUpdatedOnTime int64  `json:"last_updated_on_time"`
 }
 
+type FeverItem struct {
+	ID            int64  `json:"id"`
+	FeedID        int64  `json:"feed_id"`
+	Title         string `json:"title"`
+	Author        string `json:"author"`
+	HTML          string `json:"html"`
+	Url           string `json:"url"`
+	IsSaved       int    `json:"is_saved"`
+	IsRead        int    `json:"is_read"`
+	CreatedOnTime int64  `json:"created_on_time"`
+}
+
 type FeverFavicon struct {
-	ID int64 `json:"id"`
+	ID   int64  `json:"id"`
 	Data string `json:"data"`
 }
 
@@ -184,7 +197,62 @@ func FeverFaviconsHandler(rw http.ResponseWriter, req *http.Request) {
 }
 
 func FeverItemsHandler(rw http.ResponseWriter, req *http.Request) {
+	filter := storage.ItemFilter{}
+	query := req.URL.Query()
+	if _, ok := query["with_ids"]; ok {
+		ids := make([]int64, 0)
+		for _, idstr := range strings.Split(query.Get("with_ids"), ",") {
+			if idnum, err := strconv.ParseInt(idstr, 10, 64); err == nil {
+				ids = append(ids, idnum)
+			}
+		}
+		filter.IDs = &ids
+	}
 
+	if _, ok := query["since_id"]; ok {
+		idstr := query.Get("since_id")
+		if idnum, err := strconv.ParseInt(idstr, 10, 64); err == nil {
+			filter.SinceID = &idnum
+		}
+	}
+
+	items := db(req).ListItems(filter, 0, 50, true)
+
+	feverItems := make([]FeverItem, len(items))
+	for i, item := range items {
+		date := item.Date
+		if date == nil {
+			date = item.DateUpdated
+		}
+		time := int64(0)
+		if date != nil {
+			time = date.UnixNano() / 1000_000_000
+		}
+
+		isSaved := 0
+		if item.Status == storage.STARRED {
+			isSaved = 1
+		}
+		isRead := 0
+		if item.Status == storage.READ {
+			isRead = 1
+		}
+		feverItems[i] = FeverItem{
+			ID:            item.Id,
+			FeedID:        item.FeedId,
+			Title:         item.Title,
+			Author:        item.Author,
+			HTML:          item.Content,
+			Url:           item.Link,
+			IsSaved:       isSaved,
+			IsRead:        isRead,
+			CreatedOnTime: time,
+		}
+	}
+
+	writeFeverJSON(rw, map[string]interface{}{
+		"items": feverItems,
+	})
 }
 
 func FeverLinksHandler(rw http.ResponseWriter, req *http.Request) {
diff --git a/storage/item.go b/storage/item.go
index e24a9d8..ff9499c 100644
--- a/storage/item.go
+++ b/storage/item.go
@@ -62,6 +62,9 @@ type ItemFilter struct {
 	FeedID   *int64
 	Status   *ItemStatus
 	Search   *string
+
+	IDs      *[]int64
+	SinceID  *int64
 }
 
 func (s *Storage) CreateItems(items []Item) bool {
@@ -140,20 +143,36 @@ func listQueryPredicate(filter ItemFilter) (string, []interface{}) {
 		args = append(args, strings.Join(terms, " "))
 	}
 
+	if filter.IDs != nil {
+		cond = append(cond, "i.id in ?")
+		args = append(args, filter.IDs)
+	}
+	if filter.SinceID != nil {
+		cond = append(cond, "i.id > ?")
+		args = append(args, filter.SinceID)
+	}
+
 	predicate := "1"
 	if len(cond) > 0 {
 		predicate = strings.Join(cond, " and ")
 	}
+
 	return predicate, args
 }
 
 func (s *Storage) ListItems(filter ItemFilter, offset, limit int, newestFirst bool) []Item {
 	predicate, args := listQueryPredicate(filter)
 	result := make([]Item, 0, 0)
-	order := "desc"
+
+	order := "date desc"
 	if !newestFirst {
-		order = "asc"
+		order = "date asc"
 	}
+
+	if filter.IDs != nil || filter.SinceID != nil {
+		order = "i.id asc"
+	}
+
 	query := fmt.Sprintf(`
 		select
 			i.id, i.guid, i.feed_id, i.title, i.link, i.description,
@@ -161,7 +180,7 @@ func (s *Storage) ListItems(filter ItemFilter, offset, limit int, newestFirst bo
 		from items i
 		join feeds f on f.id = i.feed_id
 		where %s
-		order by i.date %s
+		order by %s
 		limit %d offset %d
 		`, predicate, order, limit, offset)
 	rows, err := s.db.Query(query, args...)