Fix notify silently fails (#146)

* set buffer to file size, split line into multiple chunks if size is greater than char-limit

* fix typo

internal/runner/runner.go

@@ -97,14 +97,31 @@ func (r *Runner) Run() error {
 		return errors.New("notify works with stdin or file using -data flag")
 	}
 
+	info, err := inFile.Stat()
+	if err != nil {
+		return errors.Wrap(err, "could not get file info")
+	}
 	br := bufio.NewScanner(inFile)
+	maxSize := int(info.Size())
+	buffer := make([]byte, 0, maxSize)
+	br.Buffer(buffer, maxSize)
+
 	if r.options.Bulk {
 		br.Split(bulkSplitter(r.options.CharLimit))
 	}
 	for br.Scan() {
 		msg := br.Text()
-		//nolint:errcheck
-		r.sendMessage(msg)
+		if len(msg) > r.options.CharLimit {
+			// send the msg in chunks of length charLimit
+			for _, chunk := range SplitInChunks(msg, r.options.CharLimit) {
+				//nolint:errcheck
+				r.sendMessage(chunk)
+			}
+		} else {
+			//nolint:errcheck
+			r.sendMessage(msg)
+		}
+
 	}
 	return nil
 }

internal/runner/util.go

@@ -2,6 +2,7 @@ package runner
 
 import (
 	"bufio"
+	"math"
 )
 
 var ellipsis = []byte("...")
@@ -55,3 +56,21 @@ func bulkSplitter(charLimit int) bufio.SplitFunc {
 		return
 	}
 }
+
+// SplitInChunks splits a string into chunks of size charLimit
+func SplitInChunks(data string, charLimit int) []string {
+	length := len(data)
+	noOfChunks := int(math.Ceil(float64(length) / float64(charLimit)))
+	chunks := make([]string, noOfChunks)
+	var start, stop int
+
+	for i := 0; i < noOfChunks; i += 1 {
+		start = i * charLimit
+		stop = start + charLimit
+		if stop > length {
+			stop = length
+		}
+		chunks[i] = data[start:stop]
+	}
+	return chunks
+}