1 files changed, 84 insertions, 0 deletions
diff --git a/cmd/trimqueue/main.go b/cmd/trimqueue/main.go
new file mode 100644
index 0000000..cf65c4d
--- /dev/null
+++ b/cmd/trimqueue/main.go
@@ -0,0 +1,84 @@
+// Copyright 2019 Nick White.
+// Use of this source code is governed by the GPLv3
+// license that can be found in the LICENSE file.
+
+// trimqueue deletes any messages in a queue that match a specified
+// prefix.
+package main
+
+import (
+	"flag"
+	"fmt"
+	"log"
+
+	"rescribe.xyz/bookpipeline"
+)
+
+const usage = `Usage: trimprefix qname prefix
+
+trimqueue deletes any messages in a queue that match a specified
+prefix.
+
+Valid queue names:
+- preprocess
+- wipeonly
+- ocrpage
+- analyse
+`
+
+type QueuePipeliner interface {
+	Init() error
+	RemovePrefixesFromQueue(url string, prefix string) error
+	PreQueueId() string
+	WipeQueueId() string
+	OCRPageQueueId() string
+	AnalyseQueueId() string
+}
+
+func main() {
+	flag.Usage = func() {
+		fmt.Fprintf(flag.CommandLine.Output(), usage)
+		flag.PrintDefaults()
+	}
+	flag.Parse()
+
+	if flag.NArg() != 2 {
+		flag.Usage()
+		return
+	}
+
+	var conn QueuePipeliner
+	conn = &bookpipeline.AwsConn{Region: "eu-west-2"}
+
+	err := conn.Init()
+	if err != nil {
+		log.Fatalln("Error setting up cloud connection:", err)
+	}
+
+	qdetails := []struct {
+		id, name string
+	}{
+		{conn.PreQueueId(), "preprocess"},
+		{conn.WipeQueueId(), "wipeonly"},
+		{conn.OCRPageQueueId(), "ocrpage"},
+		{conn.AnalyseQueueId(), "analyse"},
+	}
+
+	qname := flag.Arg(0)
+
+	var qid string
+	for i, n := range qdetails {
+		if n.name == qname {
+			qid = qdetails[i].id
+			break
+		}
+	}
+	if qid == "" {
+		log.Fatalln("Error, no queue named", qname)
+	}
+
+	err = conn.RemovePrefixesFromQueue(qid, flag.Arg(1))
+	if err != nil {
+		log.Fatalln("Error removing prefixes from queue", qname, ":", err)
+	}
+}