initial commit

8 files changed, 202 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..15a7c3d
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,31 @@
+# If you prefer the allow list template instead of the deny list, see community template:
+# https://github.com/github/gitignore/blob/main/community/Golang/Go.AllowList.gitignore
+#
+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Dependency directories (remove the comment below to include it)
+# vendor/
+
+# Go workspace file
+go.work
+go.work.sum
+
+# env file
+.env
+
+# binary
+./uptfs
+
+# config
+config.yaml
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..6451759
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,18 @@
+BINARY_DIR=./cmd/uptfs
+
+.PHONY: all
+all: build
+
+.PHONY: build
+build:
+	@echo "Building Go uptfs..."
+	go build $(BINARY_DIR)
+
+.PHONY: clean
+clean:
+	@echo "Cleaning build artifacts..."
+	rm -f ./uptfs
+
+.PHONY: run
+run:
+	./uptfs
\ No newline at end of file
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..f5b0d9c
--- /dev/null
+++ b/README.md
@@ -0,0 +1 @@
+# Undeclared Purpose Text Filtering System (uptfs)
diff --git a/cmd/uptfs/main.go b/cmd/uptfs/main.go
new file mode 100644
index 0000000..c8fbf89
--- /dev/null
+++ b/cmd/uptfs/main.go
@@ -0,0 +1,44 @@
+package main
+
+import (
+	"bufio"
+	"errors"
+	"fmt"
+	"os"
+	"strings"
+	"uptfs/internal/config"
+	"uptfs/internal/split"
+)
+
+const filepath = ""
+
+func main() {
+	var config config.Config
+	config.LoadConfig(filepath)
+
+	scanner := bufio.NewScanner(os.Stdin)
+	scanner.Scan()
+	inputString := scanner.Text()
+
+	if inputString == "" {
+		err := errors.New("the input string is empty")
+		fmt.Printf("%v\n", err)
+		os.Exit(1)
+	}
+
+	additionalDelimeters := []string{",", "."}
+	tokens := strings.Split(inputString, " ")
+	tokens = formatInput(tokens, additionalDelimeters)
+
+	fmt.Println(tokens)
+}
+
+func formatInput(tokenArray []string, delimeterArray []string) []string {
+	for _, delimeter := range delimeterArray {
+		for index, element := range tokenArray {
+			tokenArray = split.NewArrayWithSplit(tokenArray, index, element, delimeter)
+		}
+	}
+
+	return tokenArray
+}
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..53c34e3
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,5 @@
+module uptfs
+
+go 1.23.2
+
+require gopkg.in/yaml.v3 v3.0.1 // indirect
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..4bc0337
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,3 @@
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/internal/config/config.go b/internal/config/config.go
new file mode 100644
index 0000000..ad35ee7
--- /dev/null
+++ b/internal/config/config.go
@@ -0,0 +1,56 @@
+package config
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"gopkg.in/yaml.v3"
+)
+
+type Config struct {
+	Filters    []string `yaml:"filters"`
+	Iterations int      `yaml:"iterations"`
+}
+
+func getDefaultConfigPath() (defaultPath string, err error) {
+	programName := "uptfs"
+	configFileName := "config.yaml"
+
+	if xdg := os.Getenv("XDG_CONFIG_HOME"); xdg != "" {
+		return filepath.Join(xdg, programName, configFileName), nil
+	}
+
+	if home := os.Getenv("HOME"); home != "" {
+		return filepath.Join(home, programName, configFileName), nil
+	}
+
+	return "", errors.New("both XDG_CONFIG_HOME and HOME are not set, can't proceed")
+}
+
+func (c *Config) LoadConfig(filepath string) *Config {
+	if filepath == "" {
+		var err error
+		filepath, err = getDefaultConfigPath()
+
+		if err != nil {
+			fmt.Printf("%v\n", err)
+			os.Exit(1)
+		}
+	}
+
+	yamlFile, err := os.ReadFile(filepath)
+
+	if err != nil {
+		fmt.Printf("%v\n", err)
+		os.Exit(1)
+	}
+	err = yaml.Unmarshal(yamlFile, c)
+	if err != nil {
+		fmt.Printf("%v\n", err)
+		os.Exit(1)
+	}
+
+	return c
+}
diff --git a/internal/split/split.go b/internal/split/split.go
new file mode 100644
index 0000000..65e1a14
--- /dev/null
+++ b/internal/split/split.go
@@ -0,0 +1,44 @@
+package split
+
+import (
+	"strings"
+)
+
+func checkArrayElementsEmpty(array []string) bool {
+	for _, str := range array {
+		if str != "" {
+			return false
+		}
+	}
+	return true
+}
+
+func NewArrayWithSplit(initialArray []string, index int, token string, delimeter string) (result []string) {
+	split := strings.Split(token, delimeter)
+	splitLength := len(split)
+
+	/*
+		When a token only consists of delimeter * N (N >= 0),
+		the resulting split consists of N empty elements.
+		Here we check if it is so and essentialy remove that token
+		from resulting array.
+	*/
+	splitIsEmpty := checkArrayElementsEmpty(split)
+	if splitIsEmpty {
+		result = append(initialArray[:index], initialArray[index+1:]...)
+		return result
+	}
+
+	if splitLength > 1 {
+		if split[splitLength-1] == "" {
+			split = split[:splitLength-1]
+		}
+
+		result = append(initialArray[:index], append(split, initialArray[index+1:]...)...)
+	}
+	if splitLength == 1 {
+		result = initialArray
+	}
+
+	return result
+}