forked from the-gigi/delinkcious
/
in_memory_link_store.go
157 lines (130 loc) · 3.36 KB
/
in_memory_link_store.go
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package link_manager
import (
"errors"
"fmt"
om "github.com/EChigrina/delinkcious/pkg/object_model"
"regexp"
"time"
)
// User links are a map of url:TaggedLink
type UserLinks map[string]*om.Link
// Link store is a map of username:UserLinks
type InMemoryLinkStore map[string]UserLinks
func (m *InMemoryLinkStore) GetLinks(request om.GetLinksRequest) (result om.GetLinksResult, err error) {
userLinks := (*m)[request.Username]
if userLinks == nil {
return
}
// Prepare complied regexes
var urlRegex *regexp.Regexp
var titleRegex *regexp.Regexp
var descriptionRegex *regexp.Regexp
if request.UrlRegex != "" {
urlRegex, err = regexp.Compile(request.UrlRegex)
if err != nil {
return
}
}
if request.TitleRegex != "" {
titleRegex, err = regexp.Compile(request.UrlRegex)
if err != nil {
return
}
}
if request.DescriptionRegex != "" {
descriptionRegex, err = regexp.Compile(request.UrlRegex)
if err != nil {
return
}
}
for _, link := range userLinks {
// Check wach link against the regular expressions
if urlRegex != nil && !urlRegex.MatchString(link.Url) {
continue
}
if titleRegex != nil && !titleRegex.MatchString(link.Title) {
continue
}
if descriptionRegex != nil && !descriptionRegex.MatchString(link.Description) {
continue
}
// If there no tag was requested add link immediately and continue
if request.Tag == "" {
result.Links = append(result.Links, *link)
continue
}
// Add link only if it has the request tag
if link.Tags[request.Tag] {
result.Links = append(result.Links, *link)
}
}
return
}
func (m *InMemoryLinkStore) AddLink(request om.AddLinkRequest) (link *om.Link, err error) {
if request.Url == "" {
err = errors.New("URL can't be empty")
return
}
if request.Username == "" {
err = errors.New("User name can't be empty")
return
}
userLinks := (*m)[request.Username]
if userLinks == nil {
userLinks = UserLinks{}
} else {
if userLinks[request.Url] != nil {
msg := fmt.Sprintf("User %s already has a link for %s", request.Username, request.Url)
err = errors.New(msg)
return
}
}
link = &om.Link{
Url: request.Url,
Title: request.Title,
Description: request.Description,
CreatedAt: time.Now().UTC(),
UpdatedAt: time.Now().UTC(),
Tags: request.Tags,
}
userLinks[request.Url] = link
return
}
func (m *InMemoryLinkStore) UpdateLink(request om.UpdateLinkRequest) (link *om.Link, err error) {
userLinks := (*m)[request.Username]
if userLinks == nil || userLinks[request.Url] == nil {
msg := fmt.Sprintf("User %s doesn't have a link for %s", request.Username, request.Url)
err = errors.New(msg)
return
}
link = userLinks[request.Url]
if request.Title != "" {
link.Title = request.Title
}
if request.Description != "" {
link.Description = request.Description
}
newTags := request.AddTags
for t, _ := range link.Tags {
if request.RemoveTags[t] {
continue
}
newTags[t] = true
}
return
}
func (m *InMemoryLinkStore) DeleteLink(username string, url string) error {
if url == "" {
return errors.New("URL can't be empty")
}
if username == "" {
return errors.New("User name can't be empty")
}
userLinks := (*m)[username]
if userLinks == nil || userLinks[url] == nil {
msg := fmt.Sprintf("User %s doesn't have a link for %s", username, url)
return errors.New(msg)
}
delete((*m)[username], url)
return nil
}