4 files changed, 18 insertions, 1 deletions
diff --git a/internal/feed/cache.go b/internal/feed/cache.go
index 4a0bfe7..735a7d6 100644
--- a/internal/feed/cache.go
+++ b/internal/feed/cache.go
@@ -6,6 +6,7 @@ import (
 	"errors"
 	"fmt"
 	"os"
+	"time"
 
 	"github.com/Necoro/feed2imap-go/pkg/log"
 )
@@ -25,6 +26,7 @@ type Cache interface {
 type CachedFeed interface {
 	Checked(withFailure bool)
 	Failures() uint
+	Last() time.Time
 }
 
 func cacheForVersion(version Version) (Cache, error) {
diff --git a/internal/feed/cache_v1.go b/internal/feed/cache_v1.go
index 3d46084..1c53239 100644
--- a/internal/feed/cache_v1.go
+++ b/internal/feed/cache_v1.go
@@ -51,6 +51,10 @@ func (cf *cachedFeed) Failures() uint {
 	return cf.NumFailures
 }
 
+func (cf *cachedFeed) Last() time.Time {
+	return cf.LastCheck
+}
+
 func (cache *v1Cache) Version() Version {
 	return v1Version
 }
diff --git a/internal/feed/feed.go b/internal/feed/feed.go
index d087d3a..4ee2875 100644
--- a/internal/feed/feed.go
+++ b/internal/feed/feed.go
@@ -34,7 +34,10 @@ func (feed *Feed) descriptor() feedDescriptor {
 }
 
 func (feed *Feed) NeedsUpdate(updateTime time.Time) bool {
-	if !updateTime.IsZero() && int(time.Since(updateTime).Hours()) >= *feed.MinFreq {
+	if *feed.MinFreq == 0 { // shortcut
+		return true
+	}
+	if !updateTime.IsZero() && int(time.Since(updateTime).Hours()) < *feed.MinFreq {
 		log.Printf("Feed '%s' does not need updating, skipping.", feed.Name)
 		return false
 	}
diff --git a/internal/feed/state.go b/internal/feed/state.go
index 9a6f836..8efef5e 100644
--- a/internal/feed/state.go
+++ b/internal/feed/state.go
@@ -74,3 +74,11 @@ func NewState(cfg *config.Config) *State {
 
 	return &state
 }
+
+func (state *State) RemoveUndue() {
+	for name, feed := range state.feeds {
+		if !feed.NeedsUpdate(feed.cached.Last()) {
+			delete(state.feeds, name)
+		}
+	}
+}