Add remove_from_file.php

Author: matks

README.md

@@ -12,19 +12,27 @@ php explore_url.php <url> [--urldecode]
 Explode an URL in different parts to ease reading
 
 explore_sql_query
------------
+-----------------
 
 ```bash
 php explore_sql_query.php <query>
 ```
 Display a SQL query formatted in a more readable way
 
 compare_sql_tables
------------
+------------------
 
 ```bash
 php compare_sql_tables.php
 ```
 Compare two SQL tables to check whether their content is identical
 
 Add settings/credentials in a config.php file to run it
+
+remove_from_file
+------------------
+
+```bash
+php remove_from_file.php file1 file2 output
+```
+Compare two text files and remove from file1 the lines from file2

Util/TextColorWriter.php

@@ -14,6 +14,7 @@ class TextColorWriter
     const BASH_PROMPT_GREEN  = 32;
     const BASH_PROMPT_YELLOW = 33;
     const BASH_PROMPT_BLUE   = 34;
+    const BASH_PROMPT_CYAN   = 36;
     const BASH_PROMPT_WHITE  = 37;
 
     /**
@@ -49,7 +50,8 @@ private function getKnownColors()
             static::BASH_PROMPT_GREEN,
             static::BASH_PROMPT_YELLOW,
             static::BASH_PROMPT_BLUE,
-            static::BASH_PROMPT_WHITE
+            static::BASH_PROMPT_WHITE,
+            static::BASH_PROMPT_CYAN,
         );
 
         return $colors;

remove_from_file.php

@@ -0,0 +1,94 @@
+<?php
+
+
+/**
+ * Validate console input
+ *
+ * Die if input is not valid
+ *
+ * @param  array $argv user inputs
+ */
+function validateInput($argv)
+{
+    if (count($argv) !== 4) {
+        echo 'php remove_from_file <file1> <file2> <output>' . PHP_EOL;
+        die(1);
+    }
+
+    if (!file_exists($argv[1])) {
+        echo "Error: " . $argv[1] . " is not a valid file" . PHP_EOL;
+        die(1);
+    }
+    if (!file_exists($argv[2])) {
+        echo "Error: " . $argv[2] . " is not a valid file" . PHP_EOL;
+        die(1);
+    }
+}
+
+/**
+ * @param string $filepath
+ *
+ * @return array blacklist is in keys
+ * @throws Exception
+ */
+function computeBlackListFromFile($filepath)
+{
+    $handle = fopen($filepath, "r");
+
+    if (false === $handle) {
+        throw new \Exception("Could not open file $filepath");
+    }
+
+    $blackList = array();
+
+    while (($line = fgets($handle)) !== false) {
+        $blackList[trim($line)] = true;
+    }
+
+    fclose($handle);
+
+    return $blackList;
+}
+
+validateInput($argv);
+
+require 'Util/TextColorWriter.php';
+
+$filepath1 = $argv[1];
+$filepath2 = $argv[2];
+$outputFilepath = $argv[3];
+
+$blackList = computeBlackListFromFile($filepath2);
+
+$fileHandle1 = fopen($filepath1, "r");
+$outputFile = fopen($outputFilepath, 'w');
+
+if (false === $fileHandle1) {
+    throw new \Exception("Could not open file $fileHandle1");
+}
+if (false === $outputFile) {
+    throw new \Exception("Could not write file $outputFile");
+}
+
+$i = 0;
+$removed = 0;
+while (($line = fgets($fileHandle1)) !== false) {
+
+    $isNotInBlacklist = (false === isset($blackList[trim($line)]));
+
+    if ($isNotInBlacklist) {
+        fwrite($outputFile, $line);
+    } else {
+        $removed++;
+    }
+
+    $i++;
+}
+
+fclose($fileHandle1);
+fclose($outputFile);
+
+// echo result
+echo TextColorWriter::textColor('Done', TextColorWriter::BASH_PROMPT_GREEN) . PHP_EOL;
+echo TextColorWriter::textColor("Processed : $i lines", TextColorWriter::BASH_PROMPT_CYAN) . PHP_EOL;
+echo TextColorWriter::textColor("Removed : $removed lines", TextColorWriter::BASH_PROMPT_CYAN) . PHP_EOL;