Completely refactored

- simplified the code,
- dependency updated and handled via cmake instead of git submodules
- using spdlog,
- no ECB namespace,
- checking naming convention via clang-tidy,
- ecb_fetcher tool for getting the data,
- instructions how to set it up with nginx and cron,

.clang-format

@@ -1,31 +1,38 @@
-BasedOnStyle:  LLVM
-Language: Cpp
 AccessModifierOffset: -4
 AlignAfterOpenBracket: Align
-AlignConsecutiveAssignments: true
+AlignConsecutiveAssignments: false
+AlignConsecutiveDeclarations: false
 AlignOperands: true
-BreakBeforeBraces: Custom
+AllowShortFunctionsOnASingleLine: All
+AlwaysBreakTemplateDeclarations: 'Yes'
+BasedOnStyle: LLVM
 BraceWrapping:
-  AfterClass: false
+  AfterCaseLabel: true
+  AfterClass: true
   AfterControlStatement: true
-  AfterEnum:       true
-  AfterFunction:   true
-  AfterNamespace:  true
-  AfterObjCDeclaration: true
-  AfterStruct:     true
-  AfterUnion:      true
+  AfterEnum: true
   AfterExternBlock: true
-  BeforeCatch:     true
-  BeforeElse:      true
-  IndentBraces:    false
+  AfterFunction: true
+  AfterNamespace: true
+  AfterObjCDeclaration: true
+  AfterStruct: true
+  AfterUnion: true
+  BeforeCatch: true
+  BeforeElse: true
+  IndentBraces: false
   SplitEmptyFunction: true
-  SplitEmptyRecord: true
   SplitEmptyNamespace: true
-ColumnLimit:     120
-IndentWidth:     4
+  SplitEmptyRecord: true
+BreakBeforeBraces: Custom
+ColumnLimit: 120
+IndentCaseLabels: true
+IndentPPDirectives: BeforeHash
+IndentWidth: 4
+Language: Cpp
 NamespaceIndentation: All
 ObjCBlockIndentWidth: 4
-# SpaceBeforeInheritanceColon: true
-Standard:        Cpp11
-TabWidth:        4
-UseTab:          Never
+SpaceBeforeInheritanceColon: false
+SpaceBeforeRangeBasedForLoopColon: false
+Standard: c++17
+TabWidth: 4
+UseTab: Never

.clang-tidy

@@ -0,0 +1,51 @@
+Checks:          '-checks=-*,bugprone-*,clang-analyzer-*,cppcoreguidelines-*,modernize-*,readability-*,
+                  -bugprone-unchecked-optional-access,
+                  -cppcoreguidelines-avoid-c-arrays,
+                  -cppcoreguidelines-avoid-do-while,
+                  -cppcoreguidelines-avoid-magic-numbers,
+                  -cppcoreguidelines-pro-bounds-constant-array-index,
+                  -cppcoreguidelines-pro-bounds-pointer-arithmetic,
+                  -cppcoreguidelines-pro-bounds-array-to-pointer-decay,
+                  -cppcoreguidelines-pro-type-reinterpret-cast,
+                  -cppcoreguidelines-pro-type-union-access,
+                  -cppcoreguidelines-pro-type-vararg,
+                  -modernize-loop-convert,
+                  -modernize-pass-by-value,
+                  -modernize-use-nodiscard,
+                  -modernize-use-trailing-return-type,
+                  -readability-braces-around-statements,
+                  -readability-convert-member-functions-to-static,
+                  -readability-identifier-length,
+                  -readability-else-after-return,
+                  -readability-function-cognitive-complexity,
+                  -readability-function-size,
+                  -readability-magic-numbers,
+                  -readability-named-parameter,
+                  -readability-simplify-boolean-expr,
+                  -readability-uppercase-literal-suffix,
+                  -readability-use-anyofallof'
+
+WarningsAsErrors: ''
+HeaderFilterRegex: ''
+AnalyzeTemporaryDtors: false
+FormatStyle: none
+CheckOptions:
+    - key: cppcoreguidelines-special-member-functions.AllowSoleDefaultDtor
+      value: true
+    - key: modernize-use-override.IgnoreDestructors
+      value: 1
+    - key: readability-identifier-naming.ClassCase
+      value: Camel_Snake_Case
+    - key: readability-identifier-naming.ClassMemberCase
+      value: lower_case
+    - key: readability-identifier-naming.MemberPrefix
+      value: 'm_'
+    - key: readability-identifier-naming.ClassMethodCase
+      value: lower_case
+    - key: readability-identifier-naming.ConstexprVariableCase
+      value: UPPER_CASE
+    - key: readability-identifier-naming.StaticConstantCase
+      value: UPPER_CASE
+    - key: readability-identifier-naming.LocalVariableCase
+      value: lower_case
+...