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feeds_db.go
113 lines (86 loc) · 2.35 KB
/
feeds_db.go
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package main
import (
"errors"
"fmt"
"sort"
"time"
)
type DBFeed struct {
collection []FeedsDBModel
}
type FeedsDBModel struct {
Id string
CreatedAt string
UpdatedAt string
Name string
URL string
UserId string
LastFetchedAt string
}
func (dbFeed *DBFeed) save(feed FeedsDBModel, dbOperator *DB) (FeedsDBModel, error) {
if !dbOperator.isConnected() {
dbOperator.connect()
}
msg, err := dbOperator.execute(feed.Id, "save")
if err != nil {
fmt.Println(fmt.Printf("ERROR: %s", err))
return feed, errors.New(fmt.Sprintf("Error trying to save feed: %s", feed.Id))
}
dbFeed.collection = append(dbFeed.collection, feed)
fmt.Println(fmt.Sprintf("SUCCESS: %s", msg))
return feed, nil
}
func (dbFeed *DBFeed) getAll(dbOperator *DB) ([]FeedsDBModel, error) {
var user []FeedsDBModel
if !dbOperator.isConnected() {
dbOperator.connect()
}
msg, err := dbOperator.execute("nil", "get all")
if err != nil {
fmt.Println(fmt.Printf("ERROR: %s", err))
return user, errors.New(fmt.Sprintf("error trying to get all feeds %s", msg))
}
return dbFeed.collection, nil
}
func (dbFeed *DBFeed) getNextFeedsToFetch(limit int, dbOperator *DB) ([]FeedsDBModel, error) {
feedsToFetch := []FeedsDBModel{}
allFeeds, err := dbFeed.getAll(dbOperator)
if err != nil {
fmt.Println(fmt.Printf("ERROR: %s", err))
return feedsToFetch, errors.New("error trying to get feeds to fetch")
}
if len(allFeeds) == 0 {
return feedsToFetch, nil
}
if len(allFeeds) < limit {
limit = len(allFeeds)
}
sort.Slice(allFeeds, func(i, j int) bool {
if allFeeds[i].LastFetchedAt == "" {
return false
}
if allFeeds[j].LastFetchedAt == "" {
return true
}
return allFeeds[i].LastFetchedAt > allFeeds[j].LastFetchedAt
})
return allFeeds[:limit], nil
}
func (dbFeed *DBFeed) markFeedAsFetched(idFeed string, dbOperator *DB) (bool, error) {
if !dbOperator.isConnected() {
dbOperator.connect()
}
msg, err := dbOperator.execute(idFeed, "update feed")
if err != nil {
fmt.Println(fmt.Printf("ERROR: %s", err))
return false, errors.New("error trying to update feeds")
}
fmt.Println(fmt.Sprintf("SUCCESS: %s", msg))
for i, feed := range dbFeed.collection {
if feed.Id == idFeed {
dbFeed.collection[i].LastFetchedAt = time.Now().String()
return true, nil
}
}
return false, errors.New("feed not found on db")
}