feat: initialize project structure with SQLite database, crawler framework, and LLM-based JD analysis integration

internal/db/db.go

@@ -0,0 +1,86 @@
+package db
+
+import (
+	"database/sql"
+	"fmt"
+	"log"
+
+	_ "github.com/mattn/go-sqlite3"
+)
+
+type DB struct {
+	*sql.DB
+}
+
+func InitDB(dbPath string) (*DB, error) {
+	if dbPath == "" {
+		dbPath = "data/db/hireme.db"
+	}
+
+	conn, err := sql.Open("sqlite3", dbPath+"?_foreign_keys=on")
+	if err != nil {
+		return nil, fmt.Errorf("failed to open sqlite database: %w", err)
+	}
+
+	if err := conn.Ping(); err != nil {
+		return nil, fmt.Errorf("failed to ping sqlite database: %w", err)
+	}
+
+	database := &DB{DB: conn}
+	if err := database.migrate(); err != nil {
+		return nil, fmt.Errorf("failed to run sqlite migrations: %w", err)
+	}
+
+	log.Printf("[DB] SQLite database initialized successfully at %s", dbPath)
+	return database, nil
+}
+
+func (db *DB) migrate() error {
+	schema := `
+	CREATE TABLE IF NOT EXISTS search_targets (
+		id INTEGER PRIMARY KEY AUTOINCREMENT,
+		name TEXT NOT NULL,
+		target_url TEXT NOT NULL,
+		platform TEXT NOT NULL,
+		is_active BOOLEAN NOT NULL DEFAULT 1,
+		last_crawled_at DATETIME
+	);
+
+	CREATE TABLE IF NOT EXISTS raw_jobs (
+		id INTEGER PRIMARY KEY AUTOINCREMENT,
+		canonical_id TEXT UNIQUE NOT NULL,
+		target_id INTEGER REFERENCES search_targets(id),
+		title TEXT NOT NULL,
+		company TEXT NOT NULL,
+		location TEXT,
+		apply_url TEXT NOT NULL,
+		raw_content TEXT NOT NULL,
+		status TEXT NOT NULL DEFAULT 'PENDING',
+		crawled_at DATETIME DEFAULT CURRENT_TIMESTAMP
+	);
+
+	CREATE TABLE IF NOT EXISTS job_analyses (
+		id INTEGER PRIMARY KEY AUTOINCREMENT,
+		raw_job_id INTEGER UNIQUE NOT NULL REFERENCES raw_jobs(id) ON DELETE CASCADE,
+		score REAL DEFAULT 0.0,
+		is_qualified BOOLEAN NOT NULL DEFAULT 0,
+		matched_highlights JSON,
+		missing_highlights JSON,
+		tailoring_suggestions JSON,
+		status TEXT NOT NULL DEFAULT 'PENDING',
+		analyzed_at DATETIME
+	);
+
+	CREATE TABLE IF NOT EXISTS job_applications (
+		id INTEGER PRIMARY KEY AUTOINCREMENT,
+		raw_job_id INTEGER UNIQUE NOT NULL REFERENCES raw_jobs(id) ON DELETE CASCADE,
+		status TEXT NOT NULL DEFAULT 'SAVED',
+		notes TEXT,
+		applied_at DATETIME,
+		updated_at DATETIME DEFAULT CURRENT_TIMESTAMP
+	);
+	`
+
+	_, err := db.Exec(schema)
+	return err
+}