allPercentages.js

[
  {
    "category": "genre",
    "uid": "32e195f0-f5c9-4646-b76c-b4a68cc11be2",
    "percentage": 100,
    "color": "rgb(53, 204, 113)",
    "catIndex": 0,
    "subcatIndex": 0
  },
  {
    "category": "situation",
    "uid": "4cfc25b9-9f71-4170-9066-db3b9bdb4977",
    "percentage": 100,
    "color": "rgb(67, 218, 127)",
    "catIndex": 0,
    "subcatIndex": 6
  },
  {
    "category": "genre",
    "uid": "78fbe83e-7b97-4ac0-a772-c8e2a66ab58d",
    "percentage": 84,
    "color": "rgb(59, 159, 226)",
    "catIndex": 1,
    "subcatIndex": 2
  },
  {
    "category": "mood",
    "uid": "88207876-6536-7ef0-79ac-ec7d0f97c3fb",
    "percentage": 84,
    "color": "rgb(183, 126, 200)",
    "catIndex": 2,
    "subcatIndex": 3
  }
]

method.js

    musimapRequests() {
      let mm = {
        requests: []
      }

      let query = {
        MUST: [],
        SHOULD: []
      }
      
      let genres = this.allPercentages.filter(perc => perc.catIndex === 0) // allPercentages 

      if (genres.length < 2) {
        /**
         * 0 or 1 genres, results in 1 query
         */
        this.allPercentages.forEach((perc, index) => {
          if (this.isType(perc.uid, 'genre') || this.isType(perc.uid, 'situation')) {
            query.MUST.push({
              MATCH: {
                predicted_lexicology_v1_1: {
                  id: perc.uid,
                  value: this.bound(perc.percentage) // Bound percentage range
                }
              }
            })
          } else {
            query.SHOULD.push({
              MATCH: {
                predicted_lexicology_v1_1: {
                  id: perc.uid,
                  value: this.bound(perc.percentage)
                }
              }
            })
          }
        })
        mm.requests.push(query)
      } else {
        /**
         * More than one genre
         */

        let maxMUST = Math.min(genres.length, 3)
        
        genres.forEach((genre, i) => {
          let innerQuery = {
            MUST: [],
            SHOULD: []
          }

          this.allPercentages.forEach(innerPerc => {
            if (i < maxMUST) {
              if (this.isType(innerPerc.uid, 'genre')) {
                innerQuery.MUST.push({
                  MATCH: {
                    predicted_lexicology_v1_1: {
                      id: innerPerc.uid,
                      value: this.bound(innerPerc.percentage)
                    }
                  }
                })
              } else {
                innerQuery.SHOULD.push({
                  MATCH: {
                    predicted_lexicology_v1_1: {
                      id: innerPerc.uid,
                      value: this.bound(innerPerc.percentage)
                    }
                  }
                })
              }
            }
            mm.requests.push(innerQuery)
          })
        })
      }

      return mm
    },

output

[
  // Beginning of the first request
  {
    "MUST": [
      {
        "MATCH": {
          "predicted_lexicology_v1_1": {
            "id": "32e195f0-f5c9-4646-b76c-b4a68cc11be2",
            "value": "[80:100]"
          }
        }
      },
      {
        "MATCH": {
          "predicted_lexicology_v1_1": {
            "id": "4cfc25b9-9f71-4170-9066-db3b9bdb4977",
            "value": "[80:100]"
          }
        }
      }
    ],
    "SHOULD": [
      {
        "MATCH": {
          "predicted_lexicology_v1_1": {
            "id": "78fbe83e-7b97-4ac0-a772-c8e2a66ab58d",
            "value": "[64:100]"
          }
        }
      },
      {
        "MATCH": {
          "predicted_lexicology_v1_1": {
            "id": "88207876-6536-7ef0-79ac-ec7d0f97c3fb",
            "value": "[64:100]"
          }
        }
      }
    ]
  },
  // Beginning of the second request
  {
    "MUST": [
      {
        "MATCH": {
          "predicted_lexicology_v1_1": {
            "id": "32e195f0-f5c9-4646-b76c-b4a68cc11be2",
            "value": "[80:100]"
          }
        }
      },
      {
        "MATCH": {
          "predicted_lexicology_v1_1": {
            "id": "4cfc25b9-9f71-4170-9066-db3b9bdb4977",
            "value": "[80:100]"
          }
        }
      }
    ],
    "SHOULD": [
      {
        "MATCH": {
          "predicted_lexicology_v1_1": {
            "id": "78fbe83e-7b97-4ac0-a772-c8e2a66ab58d",
            "value": "[64:100]"
          }
        }
      },
      {
        "MATCH": {
          "predicted_lexicology_v1_1": {
            "id": "88207876-6536-7ef0-79ac-ec7d0f97c3fb",
            "value": "[64:100]"
          }
        }
      }
    ]
  }
]

pseudo.js

[
	{
    id: 'a',
		type: genre,
		score: 100
	},
	{
    id: 'b',
		type: genre,
		score: 80
	},
	{
    id: 'c',
		type: situation,
		score: 100
	},
]

should output:

[
  // 1st query
  {
    MUST: [
      { MATCH: 'a' },
      { MATCH: 'b' },
    ],
    SHOULD: [
      { MATCH: 'c' },
    ]
  },
  // 2nd
  {
    MUST: [
      { MATCH: 'a' },
    ],
    SHOULD: [
      { MATCH: 'b' },
      { MATCH: 'c' },
    ]
  },
  // 3rd
  {
    MUST: [
      { MATCH: 'b' },
    ],
    SHOULD: [
      { MATCH: 'a' },
      { MATCH: 'c' },
    ]
  }
]