1 files changed, 72 insertions, 0 deletions
diff --git a/spool.go b/spool.go
new file mode 100644
index 0000000..e3d00d9
--- /dev/null
+++ b/spool.go
@@ -0,0 +1,72 @@
+package main
+
+import (
+	"encoding/csv"
+	"fmt"
+	"log"
+	"os"
+	"path"
+	"strconv"
+)
+
+// jobs is a map that matches a job name string to its last successfull run timestamp
+type jobs map[string]uint64
+
+func loadSpool() (entries jobs, err error) {
+	var (
+		file  *os.File
+		lines [][]string
+	)
+	// We read the spool
+	file, err = os.Open(path.Join(workDir, spoolFile))
+	if err != nil {
+		return nil, fmt.Errorf("INFO Couldn't open spool file: %s", err)
+	}
+	defer file.Close()
+	lines, err = csv.NewReader(file).ReadAll()
+	if err != nil {
+		return nil, fmt.Errorf("INFO Corrupted spool file : %s", err)
+	}
+	if verbose {
+		log.Printf("Spool file content : %v\n", lines)
+	}
+
+	entries = make(map[string]uint64)
+	for _, line := range lines {
+		var (
+			i int
+		)
+		i, err = strconv.Atoi(line[1])
+		if err != nil {
+			return nil, fmt.Errorf("INFO Corrupted spool file : couldn't parse timestamp entry")
+		}
+		entries[line[0]] = uint64(i)
+	}
+	return
+}
+
+func saveSpool(entries jobs) (err error) {
+	var (
+		file    *os.File
+		lines   [][]string
+		jobName string
+		ts      uint64
+		i       int
+	)
+	file, err = os.Create(path.Join(workDir, spoolFile))
+	if err != nil {
+		return fmt.Errorf("INFO Couldn't open spool file for writing : %s", err)
+	}
+	defer file.Close()
+
+	lines = make([][]string, len(entries))
+	i = 0
+	for jobName, ts = range entries {
+		lines[i] = make([]string, 2)
+		lines[i][0] = jobName
+		lines[i][1] = fmt.Sprintf("%d", ts)
+		i++
+	}
+	err = csv.NewWriter(file).WriteAll(lines)
+	return
+}