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add sorting; implement sort criteria in default repo ; adding html header

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This commit is contained in:
Elias Kohout
2025-01-01 23:28:12 +01:00
parent db91ebeece
commit fe9ac81281
6 changed files with 43 additions and 9 deletions
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9
cmd/frontend/main.go
View File

@@ -9,14 +9,19 @@ import (
"net/http"
)
type articleDateOrder struct {}
func (ord articleDateOrder) Weight(a *model.Article) int {
return int(a.PublishDate.Unix()) * -1
}
func index(w http.ResponseWriter, req *http.Request) {
fds, _ := data.NewFileDatastore("./persistence/spiegel100.json")
repo, _ := data.NewDefaultRepository[*model.Article](fds, "article")
articles, _ := repo.GetAll()
articles, _ := repo.GetByCriteria(articleDateOrder{})
t := template.Must(template.ParseFiles("templates/article.html", "templates/layout.html"))
_ = t.ExecuteTemplate(w, "base", articles)
_ = t.ExecuteTemplate(w, "base", articles[:10])
}
func main() {

24
internal/data/DefaultRepository.go
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@@ -3,6 +3,7 @@ package data
import (
"encoding/json"
"errors"
"slices"
"strings"
)
@@ -111,7 +112,24 @@ func (repo *DefaultRepository[T]) GetById(id string) (T, error) {
return obj, nil
}
func (repo *DefaultRepository[T]) GetByCriteria(c ISearchCriteria[T]) ([]T, error) {
// TODO
return nil, nil
// Returns a slice of all elememts in the repo sort by the given an
// ISearchCriteria. Throws an error when the elememts cannot be retrieved from
// the repo.
func (repo *DefaultRepository[T]) GetByCriteria(c ISortCriteria[T]) ([]T, error) {
all, err := repo.GetAll()
if err != nil { return nil, err }
slices.SortFunc(all, func(a, b T) int {
wa, wb := c.Weight(a), c.Weight(b)
switch {
case wa > wb:
return 1
case wa < wb:
return -1
default:
return 0
}
})
return all, nil
}

2
internal/data/IRepository.go
View File

@@ -9,5 +9,5 @@ type IRepository[T IIdentifiable] interface {
Delete(t T) error
GetAll() ([]T, error)
GetById(id string) (T, error)
GetByCriteria(c ISearchCriteria[T]) ([]T, error)
GetByCriteria(c ISortCriteria[T]) ([]T, error)
}

4
internal/data/ISearchCriteria.go
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@@ -1,6 +1,6 @@
package data
// TODO docstring
type ISearchCriteria[T any] interface {
Matches(t T) bool
type ISortCriteria[T any] interface {
Weight(t T) int
}

3
templates/article.html
View File

@@ -1,10 +1,11 @@
{{ define "content" }}
{{ range . }}
<div class="card" style="">
<div class="card p-2 m-4" style="">
<div class="card-body">
<h5 class="card-title">{{ .Title }}</h5>
<h6 class="card-subtitle mb-2 text-body-secondary">{{ .Author }}</h6>
<h6 class="card-subtitle mb-2 text-body-secondary">{{ .PublishDate }}</h6>
<p class="card-text">{{ .Content }}</p>
<a href="{{ .SourceUrl }}" class="card-link">Link</a>
</div>

10
templates/layout.html
View File

@@ -4,6 +4,16 @@
<meta name="viewport" content="width=device-width, initial-scale=1">
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-QWTKZyjpPEjISv5WaRU9OFeRpok6YctnYmDr5pNlyT2bRjXh0JMhjY6hW+ALEwIH" crossorigin="anonymous">
<body>
<nav class="navbar sticky-top bg-dark">
<div class="container-fluid">
<a class="navbar-brand">crowsnest</a>
<form class="d-flex" role="search">
<input class="form-control me-2" type="search" placeholder="Suche" aria-label="Suche">
<button class="btn btn-outline-success" type="submit">Suchen</button>
</form>
</div>
</nav>
{{ template "content" . }}