// Parses the information in swarm.info file and places each entry into a Peer
// struct and appends that struct to the array of peers
// @param string swarmPath - The path to the swarminfo file
// @return error - An error can be produced when issues arise from trying to access
// the swarm file or from an invalid swarm file type - otherwise error will be nil.
func parseSwarminfo(swarmPath string) error {
lynkName := getTLynkName(swarmPath)
lynk := lynxutil.GetLynk(tLynks, lynkName)
//fmt.Println(lynk)
lynk.Peers = nil // Resets peers array
swarmFile, err := os.Open(swarmPath)
if err != nil {
return err
} else if !strings.Contains(swarmPath, "swarm.info") {
return errors.New("Invalid File Type")
}
scanner := bufio.NewScanner(swarmFile)
tempPeer := lynxutil.Peer{}
// Scan each line
for scanner.Scan() {
line := strings.TrimSpace(scanner.Text()) // Trim helps with errors in \n
split := strings.Split(line, ":::")
tempPeer.IP = split[0]
tempPeer.Port = split[1]
lynk.Peers = append(lynk.Peers, tempPeer)
}
//fmt.Println(lynk.Peers)
return swarmFile.Close()
}
// JoinLynk - Function which will allow a user to join an existing link by way of its meta.info file
// @param metaPath string - the path to the meta.info file which will be used to find the
// information about the lynk
func JoinLynk(metaPath string) error {
metaFile, err := os.Open(metaPath)
if err != nil {
return err
}
lynkName := ""
owner := ""
scanner := bufio.NewScanner(metaFile)
tempPeer := lynxutil.Peer{}
// Scan each line
for scanner.Scan() {
line := strings.TrimSpace(scanner.Text()) // Trim helps with errors in \n
split := strings.Split(line, ":::")
if split[0] == "announce" {
tempPeer.IP = split[metaValueIndex]
} else if split[0] == "port" {
tempPeer.Port = split[metaValueIndex]
} else if split[0] == "lynkName" {
lynkName = split[metaValueIndex]
} else if split[0] == "owner" {
owner = split[metaValueIndex]
} else {
return errors.New("Invalid Meta")
}
}
createJoin(lynkName, metaPath)
addLynk(lynkName, owner)
return UpdateLynk(lynkName) // Gets all of the files for the lynk over the network
}
// CreateSwarm - Creates a new swarm.info upon clicking of create button in gui
// @param string name - the name of the lynk
func CreateSwarm(name string) {
p1 := lynxutil.Peer{IP: "", Port: "8080"}
currentuser, err := user.Current()
trackerDir := currentuser.HomeDir + "/Lynx/" + name + "/" + name + "_Tracker"
os.Mkdir(trackerDir, 0755)
_, err = os.Create(trackerDir + "/swarm.info")
if err != nil {
fmt.Println(err)
}
p1.IP = lynxutil.GetIP()
addToSwarminfo(p1, trackerDir+"/swarm.info")
lynxutil.FileCopy(currentuser.HomeDir+"/Lynx/"+name+"/meta.info", trackerDir+"/meta.info")
}