feat(database): added model

- added model
- added test for model

pkg/database/migrations/004_scrape_history.sql

@@ -0,0 +1,11 @@
+-- +migrate Up
+CREATE TABLE "ScrapeHistory"
+(
+    user_source_id CHAR(25)  NOT NULL REFERENCES "UserSource" (id),
+    scrape_task_id CHAR(25) PRIMARY KEY,
+    created_at     TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    finished_at    TIMESTAMP NULL,
+    error          TEXT      NULL,
+    added_posts    INT       NOT NULL,
+    deleted_posts  INT       NOT NULL
+);

pkg/models/scrape_history.go

@@ -0,0 +1,19 @@
+package models
+
+import (
+	"time"
+)
+
+type ScrapeHistory struct {
+	ScrapeTaskID string    `json:"scrape_task_id" gorm:"primaryKey"`
+	UserSourceID string    `json:"user_source_id" gorm:""`
+	CreatedAt    time.Time `json:"created_at" gorm:""`
+	FinishedAt   time.Time `json:"finished_at" gorm:"null"`
+	Error        string    `json:"error" gorm:"null"`
+	AddedPosts   int       `json:"added_posts" gorm:"not null"`
+	DeletedPosts int       `json:"deleted_posts" gorm:"not null"`
+}
+
+func (ScrapeHistory) TableName() string {
+	return "ScrapeHistory"
+}

pkg/models/scrape_history_test.go

@@ -0,0 +1,11 @@
+package models
+
+import "testing"
+
+func TestScrapeHistory_TableName(t *testing.T) {
+	scrapeHistory := ScrapeHistory{}
+	expectedTableName := "ScrapeHistory"
+	if tableName := scrapeHistory.TableName(); tableName != expectedTableName {
+		t.Fatalf("expected %s, but got %s", expectedTableName, tableName)
+	}
+}