Greatest Movies Lab

src/movies.js

@@ -1,25 +1,106 @@
 // Iteration 1: All directors? - Get the array of all directors.
 // _Bonus_: It seems some of the directors had directed multiple movies so they will pop up multiple times in the array of directors.
 // How could you "clean" a bit this array and make it unified (without duplicates)?
-function getAllDirectors(moviesArray) {}
+function getAllDirectors(moviesArray) {
+  return moviesArray.map((movie) => movie.director);
+}
+const directors = getAllDirectors(moviesArray);
 
 // Iteration 2: Steven Spielberg. The best? - How many drama movies did STEVEN SPIELBERG direct?
-function howManyMovies(moviesArray) {}
+function howManyMovies(moviesArray) {
+  if (movies.length === 0) return 0;
+
+  const howManyMovies = moviesArray.filter(
+    (movie) =>
+      movie.director === "Steven Spielberg" && movie.genre.includes("Drama")
+  );
+  return howManyMovies.length;
+}
 
 // Iteration 3: All scores average - Get the average of all scores with 2 decimals
-function scoresAverage(moviesArray) {}
+function scoresAverage(moviesArray) {
+  if (moviesArray.length === 0) return 0;
+
+  const averageScore = moviesArray.reduce((acc, movie) => {
+    if (movie.score) {
+      return acc + movie.score;
+    } else {
+      return acc;
+    }
+  }, 0);
+
+  return Number((averageScore / moviesArray.length).toFixed(2));
+}
 
 // Iteration 4: Drama movies - Get the average of Drama Movies
-function dramaMoviesScore(moviesArray) {}
+function dramaMoviesScore(moviesArray) {
+  const dramaMovies = moviesArray.filter((movie) =>
+    movie.genre.includes("Drama")
+  );
+  return scoresAverage(dramaMovies);
+}
 
 // Iteration 5: Ordering by year - Order by year, ascending (in growing order)
-function orderByYear(moviesArray) {}
+function orderByYear(moviesArray) {
+  const moviesByYear = moviesArray.slice().sort((a, b) => {
+    if (a.year === b.year) {
+      return a.title.localeCompare(b.title);
+    } else {
+      return a.year - b.year;
+    }
+  });
+  return moviesByYear;
+}
 
 // Iteration 6: Alphabetic Order - Order by title and print the first 20 titles
-function orderAlphabetically(moviesArray) {}
+function orderAlphabetically(moviesArray) {
+  const moviesAlphabetically = moviesArray
+    .map((movie) => movie.title)
+    .sort((a, b) => a.localeCompare(b))
+    .slice(0, 20);
+  return moviesAlphabetically;
+}
 
 // BONUS - Iteration 7: Time Format - Turn duration of the movies from hours to minutes
-function turnHoursToMinutes(moviesArray) {}
+function turnHoursToMinutes(moviesArray) {
+  const moviesDuration = moviesArray.map((movie) => {
+    const duration = movie.duration.split(" ");
+    let totalDuration = 0;
+    for (let time of duration) {
+      if (time.includes("h")) {
+        totalDuration += parseInt(time) * 60;
+      } else {
+        totalDuration += parseInt(time);
+      }
+    }
+    return { ...movie, duration: totalDuration };
+  });
+  return moviesDuration;
+}
 
 // BONUS - Iteration 8: Best yearly score average - Best yearly score average
-function bestYearAvg(moviesArray) {}
+function bestYearAvg(moviesArray) {
+    if (moviesArray.length === 0) return null;
+
+    const moviesByYear = moviesArray.reduce((acc, movie) => {
+        if (!acc[movie.year]) {
+        acc[movie.year] = [movie];
+        } else {
+        acc[movie.year].push(movie);
+        }
+        return acc;
+    }, {});
+
+    let bestYear = 0;
+    let bestAverage = 0;
+
+    for (let year in moviesByYear) {
+        const average = scoresAverage(moviesByYear[year]);
+        if (average > bestAverage) {
+        bestAverage = average;
+        bestYear = year;
+        }
+    }
+
+    return `The best year was ${bestYear} with an average score of ${bestAverage}`;
+}