feat(service.url): add service to list urls by filter for admin

service/url/admin.go

@@ -0,0 +1,47 @@
+package url
+
+import (
+    "net/http"
+
+    "github.com/adhocore/urlsh/common"
+    "github.com/adhocore/urlsh/model"
+    "github.com/adhocore/urlsh/orm"
+    "github.com/adhocore/urlsh/request"
+)
+
+func ListUrlsFilteredFromRequest(req *http.Request) ([]model.Url, error) {
+    _ = req.ParseForm()
+
+    filter := request.UrlFilter{
+        ShortCode: req.Form.Get("short_code"),
+        Keyword:   req.Form.Get("keyword"),
+        Page:      req.Form.Get("page"),
+    }
+
+    return ListUrlsFiltered(filter)
+}
+
+func ListUrlsFiltered(filter request.UrlFilter) ([]model.Url, error) {
+    var urls []model.Url
+
+    limit, conn := 50, orm.Connection().Select("short_code, origin_url, hits, expires_on")
+    if filter.ShortCode != "" {
+        limit = 1
+        conn  = conn.Where("short_code = ?", filter.ShortCode)
+    } else {
+        conn.Offset(filter.GetOffset(limit))
+    }
+
+    if filter.Keyword != "" {
+        conn = conn.
+            Joins("LEFT JOIN url_keywords ON url_keywords.url_id = urls.id").
+            Joins("LEFT JOIN keywords ON url_keywords.keyword_id = keywords.id").
+            Where("keyword = ?", filter.Keyword)
+    }
+
+    if conn.Limit(limit).Find(&urls); len(urls) == 0 {
+        return urls, common.ErrNoMatchingData
+    }
+
+    return urls, nil
+}