move routes in seperate files; better error handling for enpoint functions

internal/routes/Index.go

@@ -0,0 +1,42 @@
+package routes
+
+import (
+	"crowsnest/internal/data"
+	"crowsnest/internal/model"
+	"crowsnest/internal/viewmodel"
+	"html/template"
+	"net/http"
+)
+
+// sort criteria
+type articleDateOrder struct {}
+func (ord articleDateOrder) Weight(a *model.Article) int {
+    return int(a.PublishDate.Unix())
+}
+
+// List the latest articles using the base template. 
+func Index(w http.ResponseWriter, req *http.Request) {
+    // retrieve from repo
+    fds, err := data.NewFileDatastore("./persistence/spiegel100.json")
+    if err != nil { http.Error(w, "Failed to load datastore", http.StatusInternalServerError); return; }
+    repo, err := data.NewDefaultRepository[*model.Article](fds, "article")
+    if err != nil { http.Error(w, "Failed to create repository", http.StatusInternalServerError); return; }
+    articles, err := repo.GetByCriteria(articleDateOrder{})
+    if err != nil { http.Error(w, "Failed to get articles", http.StatusInternalServerError); return; }
+
+    // truncate
+    if len(articles) > 10 {
+        articles = articles[:10]
+    }
+
+    // convert to viewmodel
+    articleVMs := make([]*viewmodel.ArticleViewModel, 0, len(articles))
+    for _, a := range articles {
+        articleVMs = append(articleVMs, viewmodel.NewArticleViewModel(a))
+    }
+
+    // render template
+    t := template.Must(template.ParseFiles("templates/article.html", "templates/layout.html"))
+    err = t.ExecuteTemplate(w, "base", articleVMs)
+    if err != nil { http.Error(w, "Failed to render template", http.StatusInternalServerError); return; }
+}

internal/routes/UpSearch.go

@@ -0,0 +1,68 @@
+package routes
+
+import (
+	"crowsnest/internal/data"
+	"crowsnest/internal/model"
+	"crowsnest/internal/viewmodel"
+	"html/template"
+	"net/http"
+	"regexp"
+	"strings"
+)
+
+// sort criteria
+type articleTermFrequency struct {
+    terms []string
+}
+
+func (ord articleTermFrequency) Weight(a *model.Article) int {
+    score := 0
+    for _, term := range ord.terms {
+        score += strings.Count(a.Content, term)
+    }
+    return score
+}
+
+// Enpoint that returns a list of articles given search terms in the post
+// request of a search form. Uses the content template.
+func UpSearch(w http.ResponseWriter, req *http.Request) {
+    // parse the form data
+    err := req.ParseForm()
+    if err != nil { http.Error(w, "Unable to parse form", http.StatusBadRequest); return; }
+
+    // collect search terms
+    p := regexp.MustCompile("\\s+")
+    searchTerms := make([]string, 0)
+    for _, elem := range p.Split(req.FormValue("search"), -1) {
+        elem = strings.TrimSpace(elem)
+        if elem == "" { continue }
+        searchTerms = append(searchTerms, elem)
+    }
+
+    // retrieve from repo
+    fds, _ := data.NewFileDatastore("./persistence/spiegel100.json")
+    if err != nil { http.Error(w, "Failed to read datastore", http.StatusInternalServerError); return; }
+
+    repo, _ := data.NewDefaultRepository[*model.Article](fds, "article")
+    if err != nil { http.Error(w, "Failed to create repository", http.StatusInternalServerError); return; }
+
+    var articles []*model.Article
+    if len(searchTerms) != 0 {
+        articles, err = repo.GetByCriteria(articleTermFrequency{ terms: searchTerms })
+    } else {
+        Index(w, req)
+        return
+    }
+    if err != nil { http.Error(w, "Failed to get articles from repo", http.StatusInternalServerError); return; }
+
+    // convert to viewmodel
+    articleVMs := make([]*viewmodel.ArticleViewModel, 0, len(articles))
+    for _, a := range articles {
+        articleVMs = append(articleVMs, viewmodel.NewArticleViewModel(a))
+    }
+    
+    // render template
+    t := template.Must(template.ParseFiles("templates/article.html"))
+    err = t.ExecuteTemplate(w, "content", articleVMs)
+    if err != nil { http.Error(w, "Failed to render template", http.StatusInternalServerError); return; }
+}

internal/viewmodel/ArticleViewModel.go

@@ -13,8 +13,8 @@ type ArticleViewModel struct {
 
 func NewArticleViewModel(a *model.Article) *ArticleViewModel {
     summary := a.Content
-    if len(a.Content) > 200 {
-        summary = summary[:200]
+    if len(a.Content) > 300 {
+        summary = summary[:300]
     }
 
     return &ArticleViewModel{