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main.go
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main.go
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package main
import (
"bufio"
"errors"
"fmt"
"log"
"os"
"regexp"
"strconv"
"strings"
"time"
"github.com/fsnotify/fsnotify"
"github.com/inconshreveable/log15"
)
const (
tasksFile = "To Do List.md"
overdueTasks = "Overdue Tasks"
upcomingTasks = "Upcoming Tasks"
completedTasks = "Completed Tasks"
repeatingEvents = "Regular Events"
inactiveEvents = "Inactive Events"
backgroundStuff = "Background Perspective Stuff"
headerLineFmt = "\n- %s\n"
genTextFmt = "\n\t\t- *%s*"
)
var genTextMatcher *regexp.Regexp
func main() {
logger := log15.New()
logger.SetHandler(log15.LvlFilterHandler(log15.LvlInfo, log15.StdoutHandler))
genTextMatcher, _ = regexp.Compile(`\t{2}- \*(.+)\*`)
quitChan := make(chan bool)
writeTimer := time.NewTimer(0)
writeDelay := 10 * time.Second
turnBlindEye := false
// Create new watcher.
watcher, err := fsnotify.NewWatcher()
if err != nil {
log.Fatal(err)
}
defer watcher.Close()
previousTasks := []*Task{}
refreshList := func() {
logger.Info("Updating task list")
ourEvents, ourTasks, err := readFromFile(logger)
if err != nil {
logger.Error(err.Error())
return
}
err = sortTasks(ourTasks, time.Now(), ourEvents, logger)
if err != nil {
logger.Warn("Unable to sort tasks, dumping text with err warning")
writeToFile(ourEvents, ourTasks, &turnBlindEye, err, logger)
return
}
if compareLists(previousTasks, ourTasks, logger) {
writeToFile(ourEvents, ourTasks, &turnBlindEye, nil, logger)
time.Sleep(1 * time.Second)
writeTimer.Stop()
} else {
logger.Debug("Task list not different enough, skipping write.")
}
previousTasks = ourTasks
}
// get api password from arguments
// define handlers
// quit
// mostUrgent
// thread for hourly updates
// change this to on the hour updates
// only write update if order of tasks is different
// file watcher lets us update 20 seconds? after last change
// refresh list on startup
refreshList()
// refresh every hour on the hour
go func() {
for {
waitForTopOfHour()
refreshList()
}
}()
// refresh on delay after file change
go func() {
for {
select {
case event, ok := <-watcher.Events:
if !ok {
logger.Error("event not OK")
return
}
if strings.Contains(event.Name, tasksFile) {
if turnBlindEye {
logger.Debug("Turning a blind eye to file update")
continue
}
if event.Has(fsnotify.Write) {
logger.Debug("File has been modified", "event", event.Name)
writeTimer.Stop()
writeTimer = time.AfterFunc(writeDelay, refreshList)
}
}
case err, ok := <-watcher.Errors:
if !ok {
logger.Error("error not OK")
return
}
logger.Error("File watching error", "err", err.Error())
}
}
}()
// Add a path.
dir := os.Getenv("NOTESDIR")
err = watcher.Add(dir + "/")
if err != nil {
logger.Error("Problem watching path", "err", err.Error())
}
// run server
<-quitChan
logger.Info("Perspective is shutting down.")
}
// read/write events to md file
func readFromFile(logger log15.Logger) ([]*GeneralEvent, []*Task, error) {
dir := os.Getenv("NOTESDIR")
if dir == "" {
fmt.Println("Don't forget to set NOTESDIR")
dir = "~/Documents/Logseq/personal/pages"
logger.Warn("Empty notes directory, adding default", "default", dir)
}
// pull in tasks file
readFile, err := os.Open(dir + "/" + tasksFile)
if err != nil {
logger.Error("Error reading Task file", "err", err.Error())
}
defer func() {
err := readFile.Close()
if err != nil {
logger.Warn("Unable to close writing file handler; perhaps restart is needed", "err", err.Error())
}
}()
fileScanner := bufio.NewScanner(readFile)
fileScanner.Split(bufio.ScanLines)
lines := []string{}
for fileScanner.Scan() {
line := fileScanner.Text()
lines = append(lines, line)
}
if len(lines) < 3 {
return []*GeneralEvent{}, []*Task{}, errors.New("tried the default notes directory but no dice")
}
ev, ta := mdToStructs(lines, logger)
return ev, ta, nil
}
func writeToFile(events []*GeneralEvent, tasks []*Task, turnBlindEye *bool, writeError error, logger log15.Logger) {
dir := os.Getenv("NOTESDIR")
*turnBlindEye = true
defer func() {
*turnBlindEye = false
}()
if dir == "" {
fmt.Println("Don't forget to set NOTESDIR")
dir = "~/Documents/Logseq/personal/pages"
logger.Warn("Empty notes directory, adding default", "default", dir)
}
w, err := os.Create(dir + "/" + tasksFile)
defer func() {
err := w.Close()
if err != nil {
logger.Warn("Unable to close writing file handler; perhaps restart is needed", "err", err.Error())
}
}()
if err != nil {
logger.Error("Error writing to Task file", "err", err.Error())
}
w.WriteString(fmt.Sprintf("Updated at %s: %s\n", time.Now().Format(updateLineFmt), whatDayIsIt(time.Now(), logger)))
if writeError != nil {
w.WriteString("Formatting error\n")
w.WriteString(writeError.Error())
}
w.WriteString(outputTasks(tasks))
w.WriteString(outputEvents(events))
logger.Info("Updated To Do List file")
}
func organizeLines(rawLine string) (string, int) {
tokens := strings.Split(rawLine, " ")
return strings.Trim(rawLine, "- "), len(tokens)
}
func mdToStructs(rawLines []string, logger log15.Logger) ([]*GeneralEvent, []*Task) {
events := []*GeneralEvent{}
tasks := []*Task{}
offsets := []int{}
lines := []string{}
// add a newline to the raw text
rawLines = append(rawLines, "\n")
// generate list of lines and matching offsets
for _, raw := range rawLines {
line, offset := organizeLines(raw)
lines = append(lines, line)
offsets = append(offsets, offset)
}
// loop through lines until we get to one of the literature headers
for ind := 0; ind < len(lines); {
line := lines[ind]
offset := offsets[ind]
if line == upcomingTasks || line == overdueTasks || line == completedTasks || line == repeatingEvents || line == inactiveEvents {
newInd := ind
// loop over all lines within the header, judged by waiting until the offset matches the header's offset (new potential header)
for newInd < len(lines)-1 {
newInd++
newOffset := offsets[newInd]
if newOffset == offset {
// now we have an index corresponding to the end of this section
break
}
}
switch line {
case upcomingTasks, overdueTasks, completedTasks:
tasks = append(tasks, mdToTasks(rawLines[ind+1:newInd], lines[ind+1:newInd], offsets[ind+1:newInd], logger)...)
case repeatingEvents, inactiveEvents:
events = append(events, mdToEvents(rawLines[ind+1:newInd], lines[ind+1:newInd], offsets[ind+1:newInd], logger)...)
}
ind = newInd
continue
}
ind++
}
return events, tasks
}
func mdToTasks(rawLines []string, lines []string, offsets []int, topLogger log15.Logger) []*Task {
topLogger = topLogger.New("function", "mdToTasks")
// offset goes up; that's the name, beginning of new Task
// offset stays equal or goes down; that's a field
newTask := &Task{}
tasks := []*Task{}
namesOffset := -1
for index, line := range lines {
line = strings.Trim(line, " ")
offset := offsets[index]
if index == 0 {
namesOffset = offset
}
loopLogger := topLogger.New("line", line, "offset", offset, "NamesOffset", namesOffset, "index", index)
loopLogger.Debug("Analyzing new Task line")
switch {
case (offset == namesOffset):
loopLogger.Debug("Adding Name")
newTask = &Task{
Name: line,
}
tasks = append(tasks, newTask)
case offset > namesOffset:
tokens := strings.Split(line, "; ")
switch tokens[0] {
case "Deadline":
loopLogger.Debug("Adding Deadline", "deadline", tokens[1])
newTask.Deadline = tokens[1]
case "Estimated Hours":
loopLogger.Debug("Adding Estimated Hours", "hours", tokens[1])
num, err := strconv.Atoi(tokens[1])
if err != nil {
loopLogger.Error("Error transforming hours into number", "err", err.Error(), "hours", tokens[1])
}
newTask.EstimatedHours = num
default:
loopLogger.Debug("Line didn't correspond to Name, Deadline, or Hours; skipping")
}
case offset < namesOffset:
loopLogger.Warn("We're parsing a line that has fewer offsets than the first line did...")
}
newTask.AddRaw(rawLines[index])
}
return tasks
}
func mdToEvents(rawLines []string, lines []string, offsets []int, topLogger log15.Logger) []*GeneralEvent {
topLogger = topLogger.New("function", "mdToEvents")
// offset goes up; that's the name, beginning of new Task
// offset stays equal or goes down; that's a field
newEvent := &GeneralEvent{}
namesOffset := -1
events := []*GeneralEvent{}
for index, line := range lines {
line = strings.Trim(line, " ")
offset := offsets[index]
if index == 0 {
namesOffset = offset
}
loopLogger := topLogger.New("line", line, "offset", offset, "namesOffset", namesOffset, "index", index)
loopLogger.Debug("Analyzing new Event line")
switch {
case (offset == namesOffset):
loopLogger.Debug("Adding Name")
newEvent = &GeneralEvent{
Name: line,
}
events = append(events, newEvent)
case offset > namesOffset:
tokens := strings.Split(line, "; ")
switch tokens[0] {
case "Rotation":
loopLogger.Debug("Adding Rotation", "rotation", tokens[1])
newEvent.Rotation = rotation(tokens[1])
case "Days":
loopLogger.Debug("Adding Days", "days", tokens[1])
newEvent.Days = tokens[1]
case "Start Time":
loopLogger.Debug("Adding Start Time", "start", tokens[1])
num, err := strconv.Atoi(tokens[1])
if err != nil {
loopLogger.Error("Error transforming start time into number", "err", err.Error(), "start", tokens[1])
}
newEvent.StartTime = num
case "Duration":
loopLogger.Debug("Adding Duration", "duration", tokens[1])
num, err := strconv.Atoi(tokens[1])
if err != nil {
loopLogger.Error("Error transforming duration into number", "err", err.Error(), "duration", tokens[1])
}
newEvent.Duration = num
case "Inactive":
loopLogger.Debug("Adding Inactivity", "inactive", tokens[1])
ans, err := strconv.ParseBool(tokens[1])
if err != nil {
loopLogger.Error("Error transforming inactivity into boolean", "err", err.Error(), "inactive", tokens[1])
}
newEvent.Inactive = ans
default:
loopLogger.Debug("Line didn't correspond to Name, Rotation, Days, Start, Duration, or Inactivity; skipping")
}
case offset < namesOffset:
loopLogger.Warn("We're parsing a line that has fewer offsets than the first line did...")
}
newEvent.AddRaw(rawLines[index])
}
return events
}