From 573ce1982da2e754947453fdaf0d50204873acb4 Mon Sep 17 00:00:00 2001
From: René 'Necoro' Neumann <necoro@necoro.eu>
Date: Sat, 25 Apr 2020 17:00:57 +0200
Subject: Larger restructuring

---
 internal/feed/state.go | 76 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 76 insertions(+)
 create mode 100644 internal/feed/state.go

(limited to 'internal/feed/state.go')

diff --git a/internal/feed/state.go b/internal/feed/state.go
new file mode 100644
index 0000000..9a6f836
--- /dev/null
+++ b/internal/feed/state.go
@@ -0,0 +1,76 @@
+package feed
+
+import (
+	"sync"
+
+	"github.com/Necoro/feed2imap-go/pkg/config"
+)
+
+type State struct {
+	feeds map[string]*Feed
+	cache Cache
+	cfg   *config.Config
+}
+
+func (state *State) Foreach(f func(*Feed)) {
+	for _, feed := range state.feeds {
+		f(feed)
+	}
+}
+
+func (state *State) ForeachGo(goFunc func(*Feed, *sync.WaitGroup)) {
+	var wg sync.WaitGroup
+	wg.Add(len(state.feeds))
+
+	for _, feed := range state.feeds {
+		go goFunc(feed, &wg)
+	}
+	wg.Wait()
+}
+
+func (state *State) LoadCache(fileName string) error {
+	cache, err := loadCache(fileName)
+	if err != nil {
+		return err
+	}
+	state.cache = cache
+
+	for _, feed := range state.feeds {
+		feed.cached = cache.findItem(feed)
+	}
+	return nil
+}
+
+func (state *State) StoreCache(fileName string) error {
+	return storeCache(state.cache, fileName)
+}
+
+func (state *State) Fetch() int {
+	state.ForeachGo(handleFeed)
+
+	ctr := 0
+	for _, feed := range state.feeds {
+		success := feed.Success()
+		feed.cached.Checked(!success)
+
+		if success {
+			ctr++
+		}
+	}
+
+	return ctr
+}
+
+func NewState(cfg *config.Config) *State {
+	state := State{
+		feeds: map[string]*Feed{},
+		cache: nil, // loaded later on
+		cfg:   cfg,
+	}
+
+	for name, parsedFeed := range cfg.Feeds {
+		state.feeds[name] = &Feed{Feed: parsedFeed}
+	}
+
+	return &state
+}
-- 
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