holders_request.go

package main

import (
	"database/sql"
	"encoding/json"
	"io"
	"net/http"
	"time"

	"github.com/gorilla/mux"
)

// ImportHolder pulls in bots from the provided db
func (m *Manager) ImportHolder() {

	// query
	rows, err := m.DB.Query("SELECT clientID, token, nickname, activity, network, address, frequency, apiToken FROM holders")
	if err != nil {
		logger.Warningf("Unable to query tokens in db: %s", err)
		return
	}

	// load existing bots from db
	for rows.Next() {
		var importedHolders Holders

		err = rows.Scan(&importedHolders.ClientID, &importedHolders.Token, &importedHolders.Nickname, &importedHolders.Activity, &importedHolders.Network, &importedHolders.Address, &importedHolders.Frequency, &importedHolders.APIToken)
		if err != nil {
			logger.Errorf("Unable to load token from db: %s", err)
			continue
		}

		go importedHolders.watchHolders()
		m.WatchHolders(&importedHolders)
		logger.Infof("Loaded holder from db: %s", importedHolders.label())
	}
	rows.Close()

	// check all entries have id
	for _, holders := range m.WatchingHolders {
		if holders.ClientID == "" {
			id, err := getIDToken(holders.Token)
			if err != nil {
				logger.Errorf("Unable to get id from token: %s", err)
				continue
			}

			stmt, err := m.DB.Prepare("UPDATE holders SET clientId = ? WHERE token = ?")
			if err != nil {
				logger.Errorf("Unable to prepare id update: %s", err)
				continue
			}

			res, err := stmt.Exec(id, holders.Token)
			if err != nil {
				logger.Errorf("Unable to update db: %s", err)
				continue
			}

			_, err = res.LastInsertId()
			if err != nil {
				logger.Errorf("Unable to confirm db update: %s", err)
				continue
			} else {
				logger.Infof("Updated id in db for %s", holders.label())
				holders.ClientID = id
			}
		}
	}
}

// AddTicker adds a new Ticker or crypto to the list of what to watch
func (m *Manager) AddHolders(w http.ResponseWriter, r *http.Request) {
	m.Lock()
	defer m.Unlock()

	logger.Debugf("Got an API request to add a holders")

	// read body
	body, err := io.ReadAll(r.Body)
	if err != nil {
		logger.Errorf("%s", err)
		w.WriteHeader(http.StatusInternalServerError)
		return
	}

	// unmarshal into struct
	var holdersReq Holders
	if err := json.Unmarshal(body, &holdersReq); err != nil {
		logger.Errorf("Unmarshalling: %s", err)
		w.WriteHeader(http.StatusInternalServerError)
		return
	}

	// ensure token is set
	if holdersReq.Token == "" {
		logger.Error("Discord token required")
		w.WriteHeader(http.StatusBadRequest)
		return
	}

	// make sure token is valid
	if holdersReq.ClientID == "" {
		id, err := getIDToken(holdersReq.Token)
		if err != nil {
			logger.Errorf("Unable to authenticate with discord token: %s", err)
			w.WriteHeader(http.StatusBadRequest)
			return
		}
		holdersReq.ClientID = id
	}

	// ensure frequency is set
	if holdersReq.Frequency <= 0 {
		holdersReq.Frequency = 60
	}

	// ensure network is set
	if holdersReq.Network == "" {
		logger.Error("Network required")
		w.WriteHeader(http.StatusBadRequest)
		return
	}

	// ensure address is set
	if holdersReq.Address == "" {
		logger.Error("Address required")
		w.WriteHeader(http.StatusBadRequest)
		return
	}

	// check if already existing
	if _, ok := m.WatchingHolders[holdersReq.label()]; ok {
		logger.Error("Network already exists")
		w.WriteHeader(http.StatusConflict)
		return
	}

	go holdersReq.watchHolders()
	m.WatchHolders(&holdersReq)

	if *db != "" {
		m.StoreHolders(&holdersReq)
	}

	w.Header().Set("Content-Type", "application/json; charset=UTF-8")
	w.WriteHeader(http.StatusOK)
	err = json.NewEncoder(w).Encode(holdersReq)
	if err != nil {
		logger.Errorf("Unable to encode holders: %s", err)
		w.WriteHeader(http.StatusBadRequest)
	}
	logger.Infof("Added holder: %s-%s\n", holdersReq.Network, holdersReq.Address)
}

func (m *Manager) WatchHolders(holders *Holders) {
	holdersCount.Inc()
	id := holders.label()
	m.WatchingHolders[id] = holders
}

// StoreTicker puts a holder into the db
func (m *Manager) StoreHolders(holders *Holders) {

	// store new entry in db
	stmt, err := m.DB.Prepare("INSERT INTO holders(clientId, token, nickname, activity, network, address, frequency, apiToken) values(?,?,?,?,?,?,?,?)")
	if err != nil {
		logger.Warningf("Unable to store holders in db %s: %s", holders.label(), err)
		return
	}

	res, err := stmt.Exec(holders.ClientID, holders.Token, holders.Nickname, holders.Activity, holders.Network, holders.Address, holders.Frequency, holders.APIToken)
	if err != nil {
		logger.Warningf("Unable to store holders in db %s: %s", holders.label(), err)
		return
	}

	_, err = res.LastInsertId()
	if err != nil {
		logger.Warningf("Unable to store holders in db %s: %s", holders.label(), err)
		return
	}
}

// DeleteHolders addds a new holders or crypto to the list of what to watch
func (m *Manager) DeleteHolders(w http.ResponseWriter, r *http.Request) {
	m.Lock()
	defer m.Unlock()

	logger.Debugf("Got an API request to delete a holders")

	vars := mux.Vars(r)
	id := vars["id"]

	if _, ok := m.WatchingHolders[id]; !ok {
		logger.Errorf("No holders found: %s", id)
		w.WriteHeader(http.StatusNotFound)
		return
	}

	// send shutdown sign
	m.WatchingHolders[id].Shutdown()
	holdersCount.Dec()

	var noDB *sql.DB
	if m.DB != noDB {
		// remove from db
		stmt, err := m.DB.Prepare("DELETE FROM holders WHERE network = ? AND address = ?")
		if err != nil {
			logger.Warningf("Unable to query holder in db %s: %s", id, err)
			return
		}

		_, err = stmt.Exec(m.WatchingHolders[id].Network, m.WatchingHolders[id].Address)
		if err != nil {
			logger.Warningf("Unable to query holder in db %s: %s", id, err)
			return
		}
	}

	// remove from cache
	delete(m.WatchingHolders, id)

	logger.Infof("Deleted holders %s", id)
	w.WriteHeader(http.StatusNoContent)
}

// RestartHolders stops and starts a holder
func (m *Manager) RestartHolders(w http.ResponseWriter, r *http.Request) {
	m.Lock()
	defer m.Unlock()

	logger.Debugf("Got an API request to restart a holders")

	vars := mux.Vars(r)
	id := vars["id"]

	if _, ok := m.WatchingHolders[id]; !ok {
		logger.Errorf("No holders found: %s", id)
		w.WriteHeader(http.StatusNotFound)
		return
	}

	// send shutdown sign
	m.WatchingHolders[id].Shutdown()

	// wait twice the update time
	time.Sleep(time.Duration(m.WatchingHolders[id].Frequency) * 2 * time.Second)

	// start the holder again
	go m.WatchingHolders[id].watchHolders()

	logger.Infof("Restarted holder %s", id)
	w.WriteHeader(http.StatusNoContent)
}

// GetHolders returns a list of what the manager is watching
func (m *Manager) GetHolders(w http.ResponseWriter, r *http.Request) {
	m.RLock()
	defer m.RUnlock()
	w.Header().Set("Content-Type", "application/json; charset=UTF-8")
	w.WriteHeader(http.StatusOK)
	if err := json.NewEncoder(w).Encode(m.WatchingHolders); err != nil {
		logger.Errorf("Serving request: %s", err)
	}
}