Code improvement, fixed staticcheck and linter warnings

.github/dependabot.yml

@@ -0,0 +1,18 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://docs.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
+version: 2
+updates:
+  - package-ecosystem: "gomod" # See documentation for possible values
+    directory: "/" # Location of package manifests
+    schedule:
+      interval: "daily"
+    # Allow up to 10 open pull requests for dependencies
+    open-pull-requests-limit: 10
+
+  - package-ecosystem: github-actions
+    directory: /
+    schedule:
+      interval: daily

.github/workflows/codeql.yml

@@ -0,0 +1,79 @@
+# For most projects, this workflow file will not need changing; you simply need
+# to commit it to your repository.
+#
+# You may wish to alter this file to override the set of languages analyzed,
+# or to provide custom queries or build logic.
+#
+# ******** NOTE ********
+# We have attempted to detect the languages in your repository. Please check
+# the `language` matrix defined below to confirm you have the correct set of
+# supported CodeQL languages.
+#
+name: "CodeQL"
+
+on:
+  push:
+    branches:
+      - "main"
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches:
+      - "main"
+  schedule:
+    - cron: "19 7 * * 2"
+
+permissions:
+  contents: read
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language:
+          - "go"
+        # CodeQL supports [ 'cpp', 'csharp', 'go', 'java', 'javascript', 'python', 'ruby' ]
+        # Learn more about CodeQL language support at https://aka.ms/codeql-docs/language-support
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      # Initializes the CodeQL tools for scanning.
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v3
+        with:
+          languages: ${{ matrix.language }}
+          # If you wish to specify custom queries, you can do so here or in a config file.
+          # By default, queries listed here will override any specified in a config file.
+          # Prefix the list here with "+" to use these queries and those in the config file.
+
+          # Details on CodeQL's query packs refer to : https://docs.github.com/en/code-security/code-scanning/automatically-scanning-your-code-for-vulnerabilities-and-errors/configuring-code-scanning#using-queries-in-ql-packs
+          # queries: security-extended,security-and-quality
+
+      # Autobuild attempts to build any compiled languages  (C/C++, C#, Go, or Java).
+      # If this step fails, then you should remove it and run the build manually (see below)
+      - name: Autobuild
+        uses: github/codeql-action/autobuild@v3
+
+      # ℹ️ Command-line programs to run using the OS shell.
+      # 📚 See https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#jobsjob_idstepsrun
+
+      #   If the Autobuild fails above, remove it and uncomment the following three lines.
+      #   modify them (or add more) to build your code if your project, please refer to the EXAMPLE below for guidance.
+
+      # - run: |
+      #   echo "Run, Build Application using script"
+      #   ./location_of_script_within_repo/buildscript.sh
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v3
+        with:
+          category: "/language:${{matrix.language}}"

.github/workflows/go.yml

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+name: Go
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Cache
+        uses: actions/cache@v4
+        with:
+          path: |
+            **/go.sum
+            **/go.mod
+          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+          restore-keys: |
+            ${{ runner.os }}-go-
+
+      - name: Setup Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: 1.20.14
+      - run: go version
+
+      - name: Examine source code for Linux AMD
+        run: GOOS=linux GOARCH=amd64 go vet -v ./...
+
+      - name: Examine source code for MacOS AMD
+        run: GOOS=darwin GOARCH=amd64 go vet -v ./...
+
+      - name: Examine source code for Windows AMD
+        run: GOOS=windows GOARCH=amd64 go vet -v ./...
+
+      - name: Examine source code for Linux ARM
+        run: GOOS=linux GOARCH=arm64 go vet -v ./...
+
+      - name: Examine source code for MacOS ARM
+        run: GOOS=darwin GOARCH=arm64 go vet -v ./...
+
+      - name: Examine source code for Windows ARM
+        run: GOOS=windows GOARCH=arm64 go vet -v ./...
+
+      - name: Test source code
+        run: go test -v -cover ./...
+
+      - name: Build for Linux AMD
+        run: GOOS=linux GOARCH=amd64 go build -v ./...
+
+      - name: Build for MacOS AMD
+        run: GOOS=darwin GOARCH=amd64 go build -v ./...
+
+      - name: Build for Windows AMD
+        run: GOOS=windows GOARCH=amd64 go build -v ./...
+
+      - name: Build for Linux ARM
+        run: GOOS=linux GOARCH=arm64 go build -v ./...
+
+      - name: Build for MacOS ARM
+        run: GOOS=darwin GOARCH=arm64 go build -v ./...
+
+      - name: Build for Windows ARM
+        run: GOOS=windows GOARCH=arm64 go build -v ./...

.github/workflows/golangci-lint.yml

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+name: golangci-lint
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+permissions:
+  contents: read
+  # Optional: allow read access to pull request. Use with `only-new-issues` option.
+  pull-requests: read
+
+jobs:
+  golangci:
+    name: lint
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Cache
+        uses: actions/cache@v4
+        with:
+          path: |
+            **/go.sum
+            **/go.mod
+          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+          restore-keys: |
+            ${{ runner.os }}-go-
+
+      - name: Setup Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: 1.20.14
+      - run: go version
+
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@v6
+        with:
+          # Optional: version of golangci-lint to use in form of v1.2 or v1.2.3 or `latest` to use the latest version
+          version: latest
+
+          # Optional: working directory, useful for monorepos
+          # working-directory: somedir
+
+          # Optional: golangci-lint command line arguments.
+          args: --timeout 3m --verbose
+
+          # Optional: show only new issues if it's a pull request. The default value is `false`.
+          only-new-issues: true
+
+          # Optional: if set to true then the action don't cache or restore ~/go/pkg.
+          # skip-pkg-cache: true
+
+          # Optional: if set to true then the action don't cache or restore ~/.cache/go-build.
+          # skip-build-cache: true