// FormatLines formats the StatLines as a table in the terminal ui
func (ilf *InteractiveLineFormatter) FormatLines(lines []*line.StatLine, headerKeys []string, keyNames map[string]string) string {
// keep ordering consistent
sort.Sort(line.StatLines(lines))
if ilf.includeHeader {
headerLine := &line.StatLine{
Fields: keyNames,
}
lines = append([]*line.StatLine{headerLine}, lines...)
}
// add new rows and columns when new hosts and stats are shown
for len(ilf.table) < len(headerKeys) {
ilf.table = append(ilf.table, new(column))
}
for _, column := range ilf.table {
for len(column.cells) < len(lines) {
column.cells = append(column.cells, new(cell))
}
}
for i, column := range ilf.table {
key := headerKeys[i]
for j, cell := range column.cells {
// i, j <=> col, row
l := lines[j]
if l.Error != nil && i == 0 {
cell.text = fmt.Sprintf("%s: %s", l.Fields["host"], l.Error)
cell.feed = true
continue
}
newText := l.Fields[key]
cell.changed = cell.text != newText
cell.text = newText
cell.feed = false
cell.header = j == 0 && ilf.includeHeader
if w := len(cell.text); w > column.width {
column.width = w
}
}
}
ilf.update()
return ""
}
// FormatLines formats the StatLines as a grid
func (glf *GridLineFormatter) FormatLines(lines []*line.StatLine, headerKeys []string, keyNames map[string]string) string {
buf := &bytes.Buffer{}
// Sort the stat lines by hostname, so that we see the output
// in the same order for each snapshot
sort.Sort(line.StatLines(lines))
// Print the columns that are enabled
for _, key := range headerKeys {
header := keyNames[key]
glf.WriteCell(header)
}
glf.EndRow()
for _, l := range lines {
if l.Printed && l.Error == nil {
l.Error = fmt.Errorf("no data received")
}
l.Printed = true
if l.Error != nil {
glf.WriteCell(l.Fields["host"])
glf.Feed(l.Error.Error())
continue
}
for _, key := range headerKeys {
glf.WriteCell(l.Fields[key])
}
glf.EndRow()
}
glf.Flush(buf)
// clear the flushed data
glf.Reset()
gridLine := buf.String()
if glf.prevLineCount != len(lines) {
glf.index = 0
}
glf.prevLineCount = len(lines)
if !glf.includeHeader || glf.index != 0 {
// Strip out the first line of the formatted output,
// which contains the headers. They've been left in up until this point
// in order to force the formatting of the columns to be wide enough.
firstNewLinePos := strings.Index(gridLine, "\n")
if firstNewLinePos >= 0 {
gridLine = gridLine[firstNewLinePos+1:]
}
}
glf.index++
if glf.index == headerInterval {
glf.index = 0
}
if len(lines) > 1 {
// For multi-node stats, add an extra newline to tell each block apart
gridLine = fmt.Sprintf("\n%s", gridLine)
}
glf.increment()
return gridLine
}