Add reported functionality

Signed-off-by: Ronni Skansing <rskansing@gmail.com>

backend/controller/campaign.go

@@ -3,6 +3,8 @@ package controller
 import (
 	"bytes"
 	"encoding/csv"
+	"io"
+	"strings"
 	"time"
 
 	"github.com/go-errors/errors"
@@ -935,3 +937,70 @@ func (c *Campaign) GetAllCampaignStats(g *gin.Context) {
 	}
 	c.Response.OK(g, stats)
 }
+
+// UploadReportedCSV uploads a CSV file with reported recipients
+func (c *Campaign) UploadReportedCSV(g *gin.Context) {
+	// handle session
+	session, _, ok := c.handleSession(g)
+	if !ok {
+		return
+	}
+	// parse campaign id
+	id, ok := c.handleParseIDParam(g)
+	if !ok {
+		return
+	}
+
+	// get the uploaded file
+	file, header, err := g.Request.FormFile("file")
+	if err != nil {
+		c.Response.ValidationFailed(g, "file", err)
+		return
+	}
+	defer file.Close()
+
+	// validate file extension
+	if !strings.HasSuffix(strings.ToLower(header.Filename), ".csv") {
+		c.Response.ValidationFailed(g, "file", errors.New("file must be a CSV"))
+		return
+	}
+
+	// read file content
+	content, err := io.ReadAll(file)
+	if err != nil {
+		c.Response.ValidationFailed(g, "file", err)
+		return
+	}
+
+	// parse CSV
+	reader := csv.NewReader(strings.NewReader(string(content)))
+	records, err := reader.ReadAll()
+	if err != nil {
+		c.Logger.Errorw("failed to parse CSV file", "error", err)
+		c.Response.ValidationFailed(g, "file", errors.New("failed to parse CSV file: "+err.Error()))
+		return
+	}
+
+	if len(records) < 2 {
+		c.Logger.Debugw("CSV file has insufficient rows", "rows", len(records))
+		c.Response.ValidationFailed(g, "file", errors.New("CSV file must have header and at least one data row"))
+		return
+	}
+
+	c.Logger.Debugw("processing CSV", "rows", len(records), "headers", records[0])
+
+	// process CSV
+	processed, skipped, err := c.CampaignService.ProcessReportedCSV(g.Request.Context(), session, id, records)
+	if err != nil {
+		c.Logger.Errorw("failed to process reported CSV", "error", err)
+		if ok := c.handleErrors(g, err); !ok {
+			return
+		}
+	}
+
+	c.Response.OK(g, gin.H{
+		"processed": processed,
+		"skipped":   skipped,
+		"message":   "CSV processed successfully",
+	})
+}